2023-11-8-1

src/tool/util.js

@@ -28,6 +28,28 @@ function blobToFile(blob, fileName){
     return blob;
 }
 
+//下载图片
+function downloadIamge (imgsrc, name) { // 下载图片地址和图片名
+	var image = new Image()
+	// 解决跨域 Canvas 污染问题
+	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/jpeg') // 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 || 'generate' // 设置图片名称
+	  a.href = url // 将生成的URL设置为a.href属性
+	  a.target='_blank'
+	  a.dispatchEvent(event) // 触发a的单击事件
+	}
+	image.src = imgsrc
+}
+
 function dataURLtoFile(dataurl, filename){
     var arr = dataurl.split(','), mime = arr[0].match(/:(.*?);/)[1],
     bstr = atob(arr[1]), n = bstr.length, u8arr = new Uint8Array(n);
@@ -144,4 +166,5 @@ export{
     formatTime,
     dataURLtoBlob,
     isMoible,
+	downloadIamge,
 }