위챗 애플릿 기초 라이브러리 버전 크기 판단

 wx.getSystemInfo({
          success: function (res) {
            var version = res.SDKVersion;
            version = version.replace(/\./g, "")
            console.log(version)
            if (parseInt(version)<230) {//  230   
            	wx.showModal({
                title: ' ',
                content: ' ， ！',
                showCancel : false,
                success(res) {
                  if (res.confirm) {
                    console.log(' ')
                  } else if (res.cancel) {
                    console.log(' ')
                  }
                }
              })
            }
          }

wx.getSetting({
            success(res) {
              if (!res.authSetting['scope.camera']) {   // 
                wx.authorize({
                  scope: 'scope.camera',
                  success() {
                    console.log(' ')
                  }, fail() {
                    wx.showModal({
                      title: ' ',
                      content: ' ， ',
                      showCancel: false,
                      success(res) {
                        if (res.confirm) {
                          console.log(' ')
                          wx.openSetting({
                            success: (res) => {
                              if (!res.authSetting['scope.camera']) {
                                wx.authorize({
                                  scope: 'scope.camera',
                                  success() {
                                    console.log(' ');
                                  }, fail() {
                                    console.log(' ');
                                  }
                                })
                              }
                            },
                            fail: function () {
                              console.log(" ");
                            }
                          })

                        } else if (res.cancel) {
                          console.log(' ')
                        }
                      }
                    })
                  }
                })
              };