This commit is contained in:
pplokijuhyg 2020-02-07 18:38:52 +08:00
parent 165958a2d4
commit bf4b70506b

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@ -13,3 +13,41 @@
## 使用 ## 使用
页面现在默认已经写好了,通过页面进行生成了 页面现在默认已经写好了,通过页面进行生成了
``` ```
$(".download").click(() => {
new html2canvas(document.getElementById('app'), {
allowTaint: true,
taintTest: true,
useCORS: true,
background: null,
windowWidth:document.body.scrollWidth,
windowHeight:document.body.scrollHeight,
x:(document.body.scrollWidth - width)/2,
y:0
}).then(canvas => {
// canvas为转换后的Canvas对象
// imgBlob = canvas.toDataURL('image/jpeg', 1.0);
// imgBlob = imgBlob.toString().substring(imgBlob.indexOf(",") + 1);
// window.saveAs(imgBlob, 'my-node.png');
let imgUrl = Canvas2Image.convertToPNG(canvas,$("#app").width(),$("#app").height())
console.log($(imgUrl).attr('src'))
imgUrl = $(imgUrl).attr('src')
// 如果浏览器支持msSaveOrOpenBlob方法也就是使用IE浏览器的时候那么调用该方法去下载图片
if (window.navigator.msSaveOrOpenBlob) {
var bstr = atob(imgUrl.split(',')[1])
var n = bstr.length
var u8arr = new Uint8Array(n)
while (n--) {
u8arr[n] = bstr.charCodeAt(n)
}
var blob = new Blob([u8arr])
window.navigator.msSaveOrOpenBlob(blob, new Date().getTime() + '.' + 'png')
} else {
// 这里就按照chrome等新版浏览器来处理
const a = document.createElement('a')
a.href = imgUrl
a.setAttribute('download', new Date().getTime() + '.png')
a.click()
}
});
})
```