Wechat applet image saving function

uni.authorize({
					scope: "scope.writePhotosAlbum",
					success: (success) => {
						//  Save pictures to local 
						this.saveImg()
					},
					fail: (fail) => {
						uni.getSetting({
						  success: (setting) => {
						    //  Not allowed to save 
						    if (setting.authSetting["scope.writePhotosAlbum"] == false) {
						      wx.showModal({
						        title: " reminder ",
						        content: " Please allow the applet to save an album or video ",
						        success: (res) => {
						          if (res.confirm) {
						            wx.openSetting();
						          }
						        },
						      });
						    } else {
						      //  Save pictures to local 
						      this.saveImg();
						    }
						  },
						});
					}
				})




//  How to save pictures 
saveImg() {
				console.log('this.codeImage', this.codeImage);
				uni.saveImageToPhotosAlbum({
				  filePath: this.codeImage,
				  success: () => {
				    uni.showToast({
				      title: " Picture saved successfully ",
				      icon: "success",
				    });
				  },
				  fail: (fail) => {
						console.log('fail', fail);
				    uni.showToast({
				      title: " Picture not saved ",
				      icon: "none",
				    });
				  },
				});
			},