Shulou(Shulou.com)06/01 Report--

This article mainly shows you "how to use the App () function", the content is easy to understand, clear, hope to help you solve your doubts, let the editor lead you to study and learn "how to use the App () function" this article.

AppApp ()

The App () function registers a Mini Program. Accept an object parameter that specifies the life cycle function of Mini Program, and so on.

Object parameter description:

Attribute type description trigger timing onLaunchFunction lifecycle function-monitor Mini Program initialization when Mini Program initialization is completed, onLaunch (global trigger only once) onShowFunction lifecycle function is triggered-monitoring Mini Program shows that when Mini Program is started, or enters the foreground display from the background, it will trigger the onShowonHideFunction lifecycle function-monitoring Mini Program hidden when Mini Program enters the background from the foreground The onHideonErrorFunction error listener function will be triggered when a script error occurs in Mini Program or when the api call fails, onError will be triggered with the error message. Other Any developers can add any function or data to the Object parameter, which can be accessed with this.

Foreground, background definition: when the user clicks the upper-left corner to close, or press the device Home key to leave Wechat, Mini Program is not directly destroyed, but into the background; when re-enter Wechat or re-open Mini Program, it will enter the foreground from the background. It should be noted that only when Mini Program enters the background for a certain period of time, or when the system resources are too high, it will be really destroyed.

Disable Mini Program (supported from basic library version 1.1.0): when users enter Mini Program from scanning, forwarding, etc. (scene values are 1007, 1008, 1011, 1025) and exit without setting the top Mini Program, Mini Program will be destroyed.

The operating mechanism of Mini Program has changed in the base library version 1.4.0: the previous shutdown logic is no longer applicable in the new version.

Sample code:

App ({onLaunch: function (options) {/ / Do something initial when launch. }, onShow: function (options) {/ / Do something when show. }, onHide: function () {/ / Do something when hide. }, onError: function (msg) {console.log (msg)}, globalData:'I am global data'}) onLaunch, onShow Parameter Field Type description path for pathString to open Mini Program queryObject to open Mini Program querysceneNumber to open Mini Program scene value shareTicketStringshareTicketreferrerInfoObject when the scene is opened from another Mini Program or official account or App, return this field referrerInfo.appIdString source Mini Program or official account or App appId For more information, please see below to explain the data sent by Mini Program from referrerInfo.extraDataObject source. Scene=1037 or 1038 support all the contents of this article "how to use the App () function". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.