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Tencent Cloud Mini Program Platform
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    App

    Last updated: 2024-11-21 18:34:18
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      App(Object object)

      Sign up for the Mini Program. Take one. Object Parameter that specifies the lifecycle callbacks of Mini Programs, and so on.
      App() Must be app.js Must be called and can be called only once. Or there will be unforeseen consequences.

      parameter

      Object object
      attribute
      type
      default
      required
      Introductions
      onLaunch
      function
      -
      no
      Lifecycle callback--Monitor Mini Program initialization.
      onShow
      function
      -
      no
      Lifecycle callback--Monitor Mini Program start or swicth to the frontend.
      onHide
      function
      -
      no
      Lifecycle callback--Monitor Mini Program swicth to the backend.
      onError
      function
      -
      no
      Error listener.
      function
      -
      no
      There is no listener function on the page.
      function
      -
      no
      Untreated Promise Rejects event listener functions.
      function
      -
      no
      Monitor subject changes
      Other
      any
      -
      no
      Developers can add any function or data variable to Object Parameter, with the this Can access
      For the definition of Mini Programs and the mechanism for running Mini Programs, see Operation mechanism.

      onLaunch(Object object)

      Mini Program initialization is completed when the trigger, the global trigger only once. Parameters can also be used wx.getLaunchOptionsSync Get.
      parameter: With wx.getLaunchOptionsSync Agreement

      onShow(Object object)

      Mini Program start, or from the background into the foreground triggered when the display. You can also use wx.onAppShow Bind listening.
      parameter: With wx.onAppShow Agreement

      onHide()

      Triggered when the Mini Program enters the background from the foreground. You can also use wx.onAppHide Bind listening.

      onError(String error)

      Script error or API Triggered on an error call. You can also use wx.onError Bind listening.
      parameter: With wx.onError Agreement

      onPageNotFound(Object object)

      Triggered when the page the Mini Program is trying to open does not exist. You can also use wx.onPageNotFound Bind listening. Attention please refer to wx.onPageNotFound.
      parameter: With wx.onPageNotFound Agreement
      Sample code:
      App({
        onPageNotFound(res) {
          wx.redirectTo({
            url: 'pages/...'
          }) // If it were Tabs Page, use the wx.switchTab
        }
      })

      onUnhandledRejection(Object object)

      Mini Programs have unhandled Promise Triggered when rejected. You can also use wx.onUnhandledRejection Bind listening. Attention please refer to wx.onUnhandledRejection.
      parameter: With wx.onUnhandledRejection Agreement

      onThemeChange(Object object)

      Triggered when the system switches topics. You can also use wx.onThemeChange Bind listening.
      parameter: With wx.onThemeChange Agreement
      The translations are provided by WeChat Translation and are for reference only. In case of any inconsistency and discrepancy between the Chinese version and the English version, the Chinese version shall prevail.Incorrect translation.

      Sample code:

      App({
        onLaunch (options) {
          // Do something initial when launch.
        },
        onShow (options) {
          // Do something when show.
        },
        onHide () {
          // Do something when hide.
        },
        onError (msg) {
          console.log(msg)
        },
        globalData: 'I am global data'
      })

      AppObject getApp(Object object)

      Gets the Mini Programs globally unique App Instance.

      parameter

      Object object
      attribute
      type
      default
      required
      Introductions
      allowDefault
      boolean
      false
      no
      in App Returns the default implementation when undefined. When the app is invoked, properties defined in the default implementation are overridden and incorporated into the app. Generally usedIndependent subcontracting

      Sample code

      // other.js
      var appInstance = getApp()
      console.log(appInstance.globalData) // I am global data

      Be careful

      Don't define App() Or call the App Precall getApp() , using this You can ge it. app Instance;
      adopt getApp() Do not privately call the lifecycle function after obtaining the instance.
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