小程序长按保存图片

爱被打了一巴掌 2022-09-04 15:57 273阅读 0赞

只需复制代码即可

longPressSaveImg (e) { 
        let that = this
        let url = e.currentTarget.dataset.url;
        console.log(url);
        if (!wx.saveImageToPhotosAlbum) { 
          wx.showModal({ 
            title: '提示',
            content: '当前微信版本过低，无法使用该功能，请升级到最新微信版本后重试。'
          })
          return;
        }
        // 检查用户授权
        wx.getSetting({ 
          success(res) { 
            if (!res.authSetting['scope.writePhotosAlbum']) { 
              // 接口调用询问 
              wx.authorize({ 
                scope: 'scope.writePhotosAlbum',
                success() { 
                  that.saveImg(url);
                },
                fail() { 
                  // 用户拒绝授权 
                  wx.showModal({ 
                    title: '保存图片',
                    content: '保存图片需要您授权',
                    showCancel: true,
                    confirmText: '确定',
                    success (res) { 
                      if (res.confirm) { 
                        // 打开设置页面 
                        wx.openSetting({ 
                          success (res) { 
                            if (res.authSetting['scope.writePhotosAlbum']) { 
                              that.saveImg(url);
                            } else { 
                              wx.showToast({ 
                                title:'授权失败!',
                                icon:"none"
                               });
                            }
                          },
                          fail (res) { 
                            wx.showToast({ 
                              title:'授权失败!',
                              icon:"none"
                             });
                          }
                        });
                      } else if (res.cancel) { 
                        wx.showToast({ 
                          title:'您已取消授权!',
                          icon:"none"
                         });
                      }
                    }
                  })
                }
              })
            } else { 
              that.saveImg(url)
            }
          },
          fail(res) { 
            console.log(res);
          }
        })
      },
      saveImg (imageUrl) {  
         wx.getImageInfo({ 
             src: imageUrl,
             success:(res)=> { 
              let path = res.path;
                wx.saveImageToPhotosAlbum({ 
                 filePath:path,
                 success:(res)=> {  
                    wx.showToast({ 
                    title:'保存成功'
                    });
                 },
                 fail:(res)=>{ 
                    wx.showToast({ 
                      title:'您已取消保存',
                      icon:"none"
                    });
                 }
                })
               },
             fail:(res)=> { 
              console.log(res);
            }
        })
      },