iOS小工具和通知中心
[英]iOS Widgets & Notification Center
问题描述
Do Widgets in iOS 11 run in the foreground or background ? 
iOS 11中的小部件可以在foreground还是在background运行？
Are Widgets updated/call the containing app when the Today View or Notification Center is simply interacted with on an iPhone? 当仅在iPhone上与“今日视图”或“通知中心”进行交互时，小部件是否会更新/调用包含的应用程序？ or must the Widget be physically touched/selected to update or communicate with the containing app? 还是必须物理触摸/选择小部件才能与包含的应用进行更新或通信？
1 个解决方案
解决方案1
0 2018-02-05 18:13:58
Widgets are small apps containing all the business logic, networking and UI elements. 窗口小部件是包含所有业务逻辑，网络和UI元素的小型应用程序。
When user sees the widget, widgetPerformUpdate(completionHandler:) method gets called and at this instance we have to update its data. 当用户看到窗口小部件时，将调用widgetPerformUpdate(completionHandler:)方法，在这种情况下，我们必须更新其数据。
There is limited functionality available for data sharing & interaction between widget and the application and very little memory is provided for widget so it needs to be light in weight without big third party frameworks. 窗口小部件与应用程序之间的数据共享和交互功能有限，并且为窗口小部件提供的内存很少，因此，在没有大型第三方框架的情况下，其重量应轻巧。
Have a look at this tutorial to get you started: https://www.raywenderlich.com/150953/today-extension-tutorial-getting-started 请看一下本教程以开始使用： https : //www.raywenderlich.com/150953/today-extension-tutorial-getting-started
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