uniapp获取（下载）图片_uniapp下载图片

代码：

saveImage(imgSrc, content = "是否允许获取保存相册权限", failTip = '暂无图片', successTip = "已保存到本地相册，请打开相册扫描") {
		uni.getImageInfo({
			src: imgSrc,
			success: function(sres) {
				console.log('图片信息', sres.path);
				uni.saveImageToPhotosAlbum({
					filePath: sres.path,
					// 保存成功，直接给出提示
					success: (res) => {
						uni.showModal({
							title: '提示',
							content: successTip,
							showCancel: false,
							confirmText: "好的"
						})
					},
					// 保存失败，判断是否授权，未授权则调用授权，否则弹出失败信息
					fail(err) {
						console.error(err);
						if (err.errMsg === "saveImageToPhotosAlbum:fail auth deny" || err.errMsg ===
							"saveImageToPhotosAlbum:fail authorize no response" || err.errMsg ===
							"saveImageToPhotosAlbum:fail auth denied") { // 没有授权，重新授权，兼容iso和Android
							uni.showModal({
								title: '授权提示',
								content: content,
								success: (res) => {
									if (res.confirm) { // 点击确定，则调用相册授权
										uni.openSetting({
											success(settingdata) {
												if (settingdata.authSetting[
														"scope.writePhotosAlbum"
													]) {
													console.log(
														"获取权限成功，再次点击图片保存到相册"
													)
													uni.showToast({
														title: '授权成功，请重试哦~'
													});
												} else {
													console.log("获取权限失败")
													uni.showToast({
														title: '请确定已打开保存权限',
														icon: "none"
													});
												}
											}
										})
									}
								}
							})
						} else if (err.errMsg === "saveImageToPhotosAlbum:fail file not found" ||
							err.errMsg ===
							"saveImageToPhotosAlbum:fail file not exists" || err.errMsg ===
							"saveImageToPhotosAlbum:fail get file data fail"
						) { // 无图片，则提示
							uni.showToast({
								title: failTip,
								icon: "none"
							});
						}
					}
				})
			}
		})
 
	},