vue下载图片(根据链接下载)
downs(){
this.downloadIamge(this.pic.url, 'pic')
}
解决浏览器下载图片的问题:
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/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;
},
输入之后向下滚动:
@blur="temporaryRepair($event)"
temporaryRepair(){
var currentPosition,timer;
var speed=1;//页面滚动距离
timer=setInterval(function(){
currentPosition=document.documentElement.scrollTop || document.body.scrollTop;
currentPosition-=speed;
window.scrollTo(0,currentPosition);//页面向上滚动
currentPosition+=speed; //speed变量
window.scrollTo(0,currentPosition);//页面向下滚动
clearInterval(timer);
},1);
},
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