ios - 更改首先打开的 View (Xcode)

Question

<分区>

Answer 1

这是由 AppDelegate.m 文件(或应用程序委托(delegate)文件的标题)中名为 didFinishLaunchingWithOptions 的方法控制的。例如，在我创建的标签栏应用程序中，它看起来像这样:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    // Override point for customization after application launch.
    // Add the tab bar controller's current view as a subview of the window

    self.window.rootViewController = self.tabBarController;
    [self.window makeKeyAndVisible];
    return YES;
}

您所要做的就是更改 self.window.rootViewController 的值。例如，假设您希望 MapViewController 成为打开的第一个页面。你可以这样做:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    // Override point for customization after application launch.
    // Add the tab bar controller's current view as a subview of the window
    MapViewController *mvc = [[MapViewController alloc]initWithNibName:@"MapViewController" bundle:nil]; //Allocate the View Controller

    self.window.rootViewController = mvc;   //Set the view controller
    [self.window makeKeyAndVisible];  
    [mvc release];    //Release the memory
    return YES;
}