H5页面生成图片
shareimg() {
let self = this;
var shareContent = document.getElementById("report-box");
var width = shareContent.offsetWidth; //获取dom 宽度
var height = shareContent.offsetHeight; //获取dom 高度
var canvas = document.createElement("canvas"); //创建一个canvas节点
var scale = 2; //定义任意放大倍数 支持小数
canvas.width = width * scale; //定义canvas 宽度 * 缩放
canvas.height = height * scale; //定义canvas高度 *缩放
// canvas.getContext("2d").scale(scale, scale); //获取context,设置scale
var opts = {
scale: scale, // 添加的scale 参数
canvas: canvas, //自定义 canvas
// logging: true, //日志开关,便于查看html2canvas的内部执行流程
width: width, //dom 原始宽度
height: height,
useCORS: true, // 【重要】开启跨域配置
};
html2canvas(shareContent, opts).then(function (canvas) {
var context = canvas.getContext("2d");
// 【重要】关闭抗锯齿
context.mozImageSmoothingEnabled = false;
context.webkitImageSmoothingEnabled = false;
context.msImageSmoothingEnabled = false;
context.imageSmoothingEnabled = false;
// 【重要】默认转化的格式为png,也可设置为其他格式
let canvasdata = canvas.toDataURL("image/png");
// canvasdata = canvasdata.replace("image/png","image/octet-stream");
uni.showToast({
title: "图片获取成功,请长按图片保存!",
});
self.imageurl = canvasdata;
self.imageheight = canvas.height * (1 / scale) * 0.8 + "px";
self.imageflag = true;
setTimeout(function () {
var selectquery = uni.createSelectorQuery();
console.log(selectquery.select(".imagebox"));
selectquery
.select(".imagebox")
.boundingClientRect((data) => {
self.blockboxheight = data.height;
})
.exec();
}, 0);
}
并且需要配置一个idv
写的比较简陋,这个可以把你当前页面所有的内容都生成一张长图。
欢迎留言讨论哈,比较也是小白一枚!