漏提api文件

2019-10-29 10:35:30 +08:00
parent 330d643705
commit 38bab91fff
2 changed files with 35 additions and 0 deletions
@@ -0,0 +1,19 @@
+export const downloadImage = (imgsrc, name) => { //下载图片地址和图片名
+    var image = new Image();
+    image.setAttribute("crossOrigin", "anonymous");
+    image.onload = function() {
+        var canvas = document.createElement("canvas");
+        canvas.width = image.width;
+        canvas.height = image.height;
+        var context = canvas.getContext("2d");
+        context.drawImage(image, 0, 0, image.width, image.height);
+        var url = canvas.toDataURL("image/png"); //得到图片的base64编码数据
+
+        var a = document.createElement("a"); // 生成一个a元素
+        var event = new MouseEvent("click"); // 创建一个单击事件
+        a.download = name || "photo"; // 设置图片名称
+        a.href = url; // 将生成的URL设置为a.href属性
+        a.dispatchEvent(event); // 触发a的单击事件
+    };
+    image.src = imgsrc;
+}