test.vue
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// cdn图片有问题 需要换成本地的图片
<template>
<div class="index">
<div class="canvas" ref="canvas">
<div class="avatar">
<img src="https://wjjtest.ys2.cnliveimg.com/shop/img/2019/12/31/5e0b06db22be5.jpg" alt="">
</div>
<div>
杜致阳签名
</div>
</div>
<div class="save_btn" @click="savecanvas">
保存图片
</div>
</div>
</template>
<script>
import html2canvas from 'html2canvas';
export default {
data () {
return {
imgUrlbase64:null
};
},
mounted(){
},
// 直接获取图片url传给原生
getimgUrl(imgData){
// 调用原生方法
// 调用分享（新方法）
if (window.webkit && window.webkit.messageHandlers && window.webkit.messageHandlers.CNDSCheckAllowVisitPhotoAlbumHandler) {
// 获取URL图片
window.webkit.messageHandlers.CNDSCheckAllowVisitPhotoAlbumHandler.postMessage({body: {imgData: imgData}});
} else if (window.obj && window.obj.CNDSCheckAllowVisitPhotoAlbumHandler) {
// 获取URL图片
window.obj.CNDSCheckAllowVisitPhotoAlbumHandler(imgData);
}
},
methods: {
savecanvas(){
let canvas = document.querySelector('.canvas');
let that = this;
html2canvas(canvas,{scale:2,logging:false,useCORS:true}).then(function(canvas) {
let type = 'png';
let imgData = canvas.toDataURL(type);
// 照片格式处理
let _fixType = function(type) {
type = type.toLowerCase().replace(/jpg/i, 'jpeg');
let r = type.match(/png|jpeg|bmp|gif/)[0];
return 'image/' + r;
};
imgData = imgData.replace(_fixType(type),'');
let filename = "证书" + '.' + type;
if(that.isCNLive){
that.getimgUrl(imgData)
}else {
that.saveFile(imgData,filename);
}
});
},
saveFile(data, filename){
debugger
let save_link = document.createElementNS('http://www.w3.org/1999/xhtml', 'a');
save_link.href = data;
save_link.download = filename;
console.log(save_link.download)
console.log(save_link.href)
let event = document.createEvent('MouseEvents');
event.initMouseEvent('click', true, false, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null);
save_link.dispatchEvent(event);
}
}
}
</script>
<style lang='less' scoped>
.index{
height: 100%;
width: 100%;
.canvas{
height: 100%;
height: 100%;
background: #d5574a;
padding: 0.5067rem 0.6rem 0;
box-sizing: border-box;
img{
width: 100%;
}
}
.save_btn{
height: 100px;
line-height: 100px;
background: #333333;
text-align: center;
color: #ffffff;
font-size: 36px;
}
}
</style>