uniapp 微信小程序下载文件 完整方法

uniapp 微信小程序下载文件 完整方法@TOC

//1. 获取相册授权
getSettingFun() {
				wx.getSetting({
					success(res) {
						if (!res.authSetting['scope.writePhotosAlbum']) {
							wx.authorize({
								scope: 'scope.writePhotosAlbum',
								success() {
									console.log('授权成功')
								}
							})
						}
					}
				})
			},

//2. 保存图片/视频到本地
			
			dlImg(type) {
				let url = null;
				let api = null;
				// 保存视频到本地
				if( type == 'video' ){
					url = this.data.url;
					api = 'saveVideoToPhotosAlbum';
				}
				// 保存图片到本地
				if( type == 'image' ){
					url = this.data.cover;
					api = 'saveImageToPhotosAlbum';
				}
				
				uni.showLoading({
					title: '加载中..'
				});
				wx.downloadFile({
					url, //图片地址
					success: (res) => {
						console.log(res);
						//图片保存到本地
						// saveVideoToPhotosAlbum
						wx[api]({
							filePath: res.tempFilePath,
							success: (data) => {
								wx.hideLoading()
								wx.showModal({
									title: '提示',
									content: type=='video'?'短视频保存成功~':'封面保存成功~',
									showCancel: false,
								});
								this.$refs.uToast.close();
							},
							fail: (err) => {
								if (err.errMsg === api+":fail:auth denied" ||
									err.errMsg === api+":fail auth deny" ||
									err.errMsg === api+":fail authorize no response") {
									// 这边微信做过调整，必须要在按钮中触发，因此需要在弹框回调中进行调用
									wx.showModal({
										title: '提示',
										content: '需要您授权保存相册',
										showCancel: false,
										success: modalSuccess => {
											wx.openSetting({
												success(settingdata) {
													console.log("settingdata",
														settingdata)
													if (settingdata
														.authSetting[
															'scope.writePhotosAlbum'
														]) {
														wx.showModal({
															title: '提示',
															content: '获取权限成功,再次点击保存海报即可保存',
															showCancel: false,
														})
													} else {
														wx.showModal({
															title: '提示',
															content: '获取权限失败，将无法保存到相册哦~',
															showCancel: false,
														})
													}
												},
												fail(failData) {
													console.log("failData",
														failData);
												},
												complete(finishData) {
													console.log("finishData",
														finishData);
												}
											})
										}
									})
								}
							},
							complete(res) {
								wx.hideLoading()
							}
						})
					}
				})
				setTimeout(() => {
					uni.hideLoading();
				}, 5000)
			}