553 lines
16 KiB
Vue
553 lines
16 KiB
Vue
<template>
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<view class="u-cropper">
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<view class="u-cropper__container"
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@touchstart.prevent="handleTouchStart"
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@touchmove.prevent="handleTouchMove"
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@touchend.prevent="handleTouchEnd">
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<!-- 遮罩层和裁剪框 -->
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<view class="u-cropper__mask">
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<!-- 裁剪框边框 -->
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<view class="u-cropper__cropbox" :class="[showGrid && 'u-cropper__cropbox_grid', `u-cropper__cropbox_${shape}`]" :style="cropBoxStyle">
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<view v-if="shape === 'square'" class="u-cropper__edge u-cropper__edge--1"></view>
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<view v-if="shape === 'square'" class="u-cropper__edge u-cropper__edge--2"></view>
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<view v-if="shape === 'square'" class="u-cropper__edge u-cropper__edge--3"></view>
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<view v-if="shape === 'square'" class="u-cropper__edge u-cropper__edge--4"></view>
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</view>
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</view>
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<!-- 图片层 -->
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<image
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v-if="viewData.imageLoaded && viewData.imageSrc"
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class="u-cropper__image"
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:src="viewData.imageSrc"
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:style="imageStyle"
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mode="aspectFit"
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@error="onImageError"
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/>
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</view>
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<!-- 工具栏 -->
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<view class="u-cropper__tools">
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<view class="u-cropper__button__cancel" @click="close">
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<text>取消</text>
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</view>
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<view class="cropper__button__choose" @click="chooseImage">
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<u-icon name="photo" size="36" color="#fff"/>
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</view>
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<view class="cropper__button__rotate" @click="rotateImage">
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<u-icon name="rotate" size="36" color="#fff"/>
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</view>
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<view class="u-cropper__button__confirm" @click="confirmCrop(false)">
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<text>确定</text>
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</view>
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</view>
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<!-- Canvas层 -->
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<canvas
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<!-- #ifdef MP-WEIXIN -->
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type="2d"
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<!-- #endif -->
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canvas-id="cropper"
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id="cropper"
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class="u-cropper__canvas" :style="canvasStyle"></canvas>
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</view>
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</template>
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<script>
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import props from './props.js';
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import mixin from '../../libs/mixin/mixin'
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import mpMixin from '../../libs/mixin/mpMixin';
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import ImageCropper from './cropper.js';
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/**
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* Cropper 图片裁剪组件
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* @description 封装的图片裁剪组件，支持图片选择、裁剪、旋转等功能，适用于头像上传、图片编辑等场景
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* @tutorial https://uview.d3u.cn/components/cropper.html
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*
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* @property {Boolean} autoChoose 每次显示时是否自动打开选择图片（默认 false ）
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* @property {String | Number} rectWidth 裁剪框宽度，单位px（默认 200 ）
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* @property {String | Number} rectHeight 裁剪框高度，单位px（默认 200 ）
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* @property {String | Number} width 输出图片宽度，单位px（默认 200 ）
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* @property {String | Number} height 输出图片高度，单位px（默认 200 ）
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* @property {String} fileType 输出图片格式，支持jpg/png，建议使用jpg减小文件大小（默认 'jpg' ）
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* @property {Boolean} showGrid 是否显示网格线（默认 true ）
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* @property {String} shape 输入框形状，circle-圆形，square-方形 （ 默认 'square' ）
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* @event {Function} change 选择图片时触发，返回原始图片路径
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* @event {Function} open 打开裁剪弹窗时触发
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* @event {Function} close 关闭裁剪弹窗时触发
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* @event {Function} confirm 确认裁剪时触发，返回裁剪后的图片临时路径
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* @example <u-cropper @confirm="onCropperConfirm"></u-cropper>
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*/
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export default {
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name: "u-cropper",
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mixins: [mpMixin, mixin, props],
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data() {
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return {
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cropper: null,
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canvasId: uni.$u.guid(),
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viewData: {
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imageLoaded: false,
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imageSrc: '',
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imageData: {},
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canvasWidth: 0,
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canvasHeight: 0,
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rectWidth: 0,
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rectHeight: 0
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}
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};
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},
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computed: {
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// 图片样式 - 从原始数据计算
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imageStyle() {
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const imageData = this.viewData.imageData;
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if (!this.viewData.imageLoaded || !imageData || !imageData.width) return {};
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let duration = '0s';
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let transform = `translate3d(${imageData.x}px, ${imageData.y}px,0)`;
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if (imageData.angle && imageData.angle !== 0) {
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duration = '0.3s';
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transform += ` rotate(${imageData.angle}deg)`;
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}
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return {
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width: uni.$u.addUnit(imageData.width),
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height: uni.$u.addUnit(imageData.height),
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transform: transform,
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transitionDuration: duration
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};
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},
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// 裁剪框样式 - 从原始数据计算
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cropBoxStyle() {
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if (!this.viewData.canvasWidth) return {};
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const rectX = (this.viewData.canvasWidth - this.viewData.rectWidth) / 2;
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const rectY = (this.viewData.canvasHeight - this.viewData.rectHeight) / 2;
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return {
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boxShadow: '0 0 0 '+ this.viewData.canvasWidth +'px rgba(0, 0, 0, 0.5)',
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left: uni.$u.addUnit(rectX),
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top: uni.$u.addUnit(rectY),
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width: uni.$u.addUnit(this.viewData.rectWidth),
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height: uni.$u.addUnit(this.viewData.rectHeight)
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};
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},
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canvasStyle() {
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return {
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width: uni.$u.addUnit(this.width),
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height: uni.$u.addUnit(this.height)
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}
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}
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},
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mounted() {
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this.$nextTick(async ()=>{
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await uni.$u.sleep(30)
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this.initCropper();
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})
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},
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watch: {
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},
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// #ifdef VUE3
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emits: ['change', 'open', 'close','confirm'],
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// #endif
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methods: {
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// 初始化裁剪器
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async initCropper() {
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const options = {
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canvasId: 'cropper',
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width: uni.$u.getPx(this.width),
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height: uni.$u.getPx(this.height),
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rectWidth: uni.$u.getPx(this.rectWidth),
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rectHeight: uni.$u.getPx(this.rectHeight),
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fileType: 'jpg',
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quality: 0.8,
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onUpdate: (viewData) => {
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this.viewData = viewData;
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}
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};
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// #ifdef MP-WEIXIN
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options.type = '2d';
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// #endif
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this.cropper = new ImageCropper(this, options);
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this.$emit('open');
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if(this.autoChoose) {
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this.chooseImage();
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}
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},
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// 加载图片
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loadImage(src) {
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if (!this.cropper) return;
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this.cropper.setImage(src).catch(err => {
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console.error('图片加载失败:', err);
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uni.showToast({
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title: '图片加载失败',
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icon: 'none'
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});
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});
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},
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// 选择图片
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chooseImage() {
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uni.chooseImage({
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count: 1,
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sizeType: ['original', 'compressed'],
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sourceType: ['album', 'camera'],
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success: (res) => {
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const imagePath = res.tempFilePaths[0];
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this.$emit('change', imagePath);
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this.loadImage(imagePath);
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},
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fail: () => {
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uni.showToast({
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title: '选择图片失败',
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icon: 'none'
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});
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}
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});
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},
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// 图片加载失败
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onImageError(e) {
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console.error('图片加载失败', e);
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uni.showToast({
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title: '图片加载失败',
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icon: 'none'
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});
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},
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// 旋转图片
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rotateImage() {
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if (this.cropper) {
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this.cropper.rotate(90);
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}
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},
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// 重置图片
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resetImage() {
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if (this.cropper) {
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this.cropper.reset();
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}
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},
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// 确认裁剪
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async confirmCrop() {
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if (!this.cropper || !this.viewData.imageLoaded) {
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uni.showToast({
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title: '请先选择图片',
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icon: 'none'
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});
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return;
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}
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uni.showLoading({
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title: '裁剪中...',
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mask: true
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});
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this.cropper.getCropperImage().then((res)=>{
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this.$emit('confirm',res);
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this.close();
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}).catch(err => {
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console.error('裁剪失败:', err);
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uni.showToast({
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title: '裁剪失败',
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icon: 'none'
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});
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}).finally(()=>{
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uni.hideLoading();
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});
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},
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// 关闭裁剪器
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close() {
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if (this.cropper) {
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this.cropper.destroy();
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this.cropper = null;
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}
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this.viewData = {};
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this.$emit('close');
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},
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// 处理触摸开始 - 兼容各平台
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handleTouchStart(e) {
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if (!this.cropper) return;
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// 阻止默认行为和事件冒泡
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e.preventDefault && e.preventDefault();
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e.stopPropagation && e.stopPropagation();
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// 兼容不同平台的触摸事件
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let touch;
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// #ifdef H5
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touch = e.touches ? e.touches[0] : e;
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// #endif
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// #ifndef H5
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touch = e.touches && e.touches[0] ? e.touches[0] : e.changedTouches && e.changedTouches[0] ? e.changedTouches[0] : e;
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// #endif
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const event = {
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touches: [{
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clientX: touch.clientX || touch.x || touch.pageX,
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clientY: touch.clientY || touch.y || touch.pageY
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}]
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};
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this.cropper.touchStart(event);
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},
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// 处理触摸移动 - 兼容各平台
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handleTouchMove(e) {
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if (!this.cropper) return;
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// 阻止默认行为和事件冒泡
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e.preventDefault && e.preventDefault();
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e.stopPropagation && e.stopPropagation();
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// 兼容不同平台的触摸事件
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let touch;
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// #ifdef H5
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touch = e.touches ? e.touches[0] : e;
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// #endif
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// #ifndef H5
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touch = e.touches && e.touches[0] ? e.touches[0] : e.changedTouches && e.changedTouches[0] ? e.changedTouches[0] : e;
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// #endif
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const event = {
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touches: [{
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clientX: touch.clientX || touch.x || touch.pageX,
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clientY: touch.clientY || touch.y || touch.pageY
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}],
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preventDefault: () => {}
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};
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this.cropper.touchMove(event);
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},
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// 处理触摸结束 - 兼容各平台
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handleTouchEnd(e) {
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if (!this.cropper) return;
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// 阻止默认行为和事件冒泡
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e.preventDefault && e.preventDefault();
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e.stopPropagation && e.stopPropagation();
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this.cropper.touchEnd(e);
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}
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},
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// #ifdef VUE2
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beforeDestroy() {
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if (this.cropper) {
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this.cropper.destroy();
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this.cropper = null;
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}
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}
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// #endif
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// #ifdef VUE3
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beforeUnmount() {
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if (this.cropper) {
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this.cropper.destroy();
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this.cropper = null;
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}
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}
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// #endif
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};
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</script>
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<style scoped lang="scss">
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.u-cropper {
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position: fixed;
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top: 0;
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left: 0;
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right: 0;
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bottom: 0;
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z-index: 999;
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background: #000;
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&__mask {
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position: absolute;
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top: 0;
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left: 0;
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right: 0;
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bottom: 0;
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z-index: 2;
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}
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&__cropbox {
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position: absolute;
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background: transparent;
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box-sizing: border-box;
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border: 1px solid rgba(255, 255, 255, .5);
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&_grid {
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&::before{
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content: '';
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position: absolute;
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top: 33.3333%;
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height: 33.3333%;
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left: 0;
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width: 100%;
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border: 1px dashed rgba(255, 255, 255, .5);
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}
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&::after{
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content: '';
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position: absolute;
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top: 0;
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left: 33.3333%;
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width: 33.3333%;
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height: 100%;
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border: 1px dashed rgba(255, 255, 255, .5);
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}
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}
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&_circle{
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border-radius: 100%;
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overflow: hidden;
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}
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&_square{
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}
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}
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&__edge {
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position: absolute;
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border:3px solid #ffffff;
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width: 15px;
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height: 15px;
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&--1 {
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top: -3px;
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left: -3px;
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border-right: 0;
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border-bottom: 0;
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}
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&--2 {
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top: -3px;
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right: -3px;
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border-left: 0;
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border-bottom: 0;
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}
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&--3 {
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bottom: -3px;
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left: -3px;
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border-right: 0;
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border-top: 0;
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}
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&--4 {
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bottom: -3px;
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right: -3px;
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border-left: 0;
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border-top: 0;
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}
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}
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&__image {
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position: absolute;
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left: 0;
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top: 0;
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z-index: 1;
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display: block;
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transform-origin: center center;
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}
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// &__grid {
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// position: absolute;
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// top: 0;
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// left: 0;
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// right: 0;
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// bottom: 0;
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// &-line {
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// position: absolute;
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// background: rgba(255, 255, 255, 0.3);
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// &--v {
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// top: 0;
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// bottom: 0;
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// width: 1px;
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// &1 {
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// left: 33.33%;
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// }
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// &2 {
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// left: 66.67%;
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// }
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// }
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// &--h {
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// left: 0;
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// right: 0;
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// height: 1px;
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// &1 {
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// top: 33.33%;
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// }
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// &2 {
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// top: 66.67%;
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// }
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// }
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// }
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// }
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&__tools {
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position: absolute;
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bottom: 0;
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left: 0;
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right: 0;
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z-index: 100;
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padding: 20px;
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display: flex;
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flex-direction: row;
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align-items: center;
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justify-content: space-between;
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}
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&__button{
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&__cancel{
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color:#fff;
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font-weight: 700;
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width: 70px;
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height: 40px;
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line-height: 40px;
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text-align: center;
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}
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&__confirm {
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color:#fff;
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font-weight: 700;
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width: 70px;
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height: 40px;
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line-height: 40px;
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background-color: $u-primary;
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border-radius: 4px;
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text-align: center;
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}
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}
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&__canvas {
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position: absolute;
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left: -9999px;
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top: -9999px;
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opacity: 0;
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}
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}
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</style> |