小程序保存图片到手机相册

item.tempFilePath :图片地址(如果网路地址先下载)

        //图片保存到本地
        wx.saveImageToPhotosAlbum({
          filePath: item.tempFilePath,
          success: function (data) {
            console.log(data)
            wx.hideLoading()
            wx.showToast({
              title: '保存成功',
              icon: 'success',
              duration: 2000
            })
          },
          fail: function (err) {
            console.log(err);
            // $yjpToast.show({
            //   text: `保存失败`
            // })
            if (err.errMsg === "saveImageToPhotosAlbum:fail auth deny" || err.errMsg === "saveImageToPhotosAlbum:fail:auth denied") {
              console.log("当初用户拒绝，再次发起授权")
              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,再次点击图片即可保存',
                          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)
                    }
                  })
                }
              })
            }
          }
        });