uniapp截屏并保存到相册

let pages = getCurrentPages();
let page = pages[pages.length - 1];
let webView = page.$getAppWebview();
let bitmap = new plus.nativeObj.Bitmap('drawScreen');
webView.draw(bitmap, () => {
	//保存到本地
	bitmap.save('_doc/'+ datefmt(new Date(), 'YYYYMMDDHHmmss') + ".png", {
		overwrite: true
	}, res => {
		const locationUrl = res.target; // 图片地址  
		console.log('本地路径:'+locationUrl)
		//保存到相册
		uni.saveImageToPhotosAlbum({
			filePath:locationUrl,
			success: function () {
				console.log('save success');
			}
		});
		bitmap.clear(); // 清除Bitmap对象  
		//分享给微信
		uni.share({
		    provider: "weixin",
		    scene: "WXSceneSession",
		    type: 0,
		    href: this.shareUrl+"?source=app&shareId="+this.user.id,
		    title: this.shareTitle,
		    summary: this.shareContent,
		    imageUrl: locationUrl,
		    success: function (res) {
		        console.log("success:" + JSON.stringify(res));
		    },
		    fail: function (err) {
		        console.log("fail:" + JSON.stringify(err));
		    }
		});
		
	}, error => {
		console.log(JSON.stringify(error)); // 保存失败信息  
		bitmap.clear(); // 清除Bitmap对象  
	});
	
	
}, error => {
	console.log(JSON.stringify(error)); // 绘制失败  
}, {
	check: true, // 设置为检测白屏  
});

注意：android云端打包后可能出现-100错误，检查manifest.json权限配置