Cocoa Touch - viewDidLoad 方法的替代方法
我正在创建一个从网络读取文本文件的应用程序。当应用程序首次运行时，我希望显示一个带有徽标的启动页面。我有一个 SplashViewController 和一个 MainController。我正在使用教程中的一些代码，该代码允许您向 MainController 的 applicationDidFinishLaunching 方法添加子视图，并用启动屏幕替换主控制器的视图（到目前为止遵循？尽力解释）
我遇到的问题是我想要启动屏幕将一直显示，直到从网络加载数据并为活动指示器设置动画。但是，我正在从 MainController 中的 viewDidLoad 方法中检索数据，并且应用程序在启动画面加载之前开始检索数据，因此在用户看到任何内容之前会有延迟。
在显示启动画面后，是否可以使用另一种方法来开始检索过程？
I am creating an app that reads a text file from the web. WHen the app first runs, I want a splash page to be presented with a logo. I have a SplashViewController and a MainController. I am using some code from a tutorial that allows you to add a subview to the MainController's applicationDidFinishLaunching method and replace the main controller's view with the splash screen (follow so far? Trying my best to explain)
The issue I am having is that I want the splash screen to be present until the data is loaded from the web and animate an activity indicator. However, I am retrieving the data from within the viewDidLoad method in the MainController and the app starts retrieving the data before the splash screen loads so there is a delay before the user sees anything.
Is there another method that I can use to begin the retrieval process after the splash has been displayed?
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您是否尝试过
-viewDidAppear:而不是-viewDidLoad:？前者在视图添加到窗口时发送，而后者在视图加载（从 nib 文件）时发送，即尚未显示。Have you tried
-viewDidAppear:instead of-viewDidLoad:? The former is sent when the view has been added to the window whilst the latter is sent when the view has been loaded (from a nib file), i.e., hasn’t been shown yet.