Question

我想在按下按钮时更改视图。在根视图中。我有这个：

@interface MainViewController : UIViewController

-(IBAction)switchToMap;

@end

在.m我有这个：

-(IBAction)switchToMap
{
    CustomViewController *customViewController = [[CustomViewController alloc] initWithNibName:@"CustomViewController" bundle:nil];
    customViewController.title = @"Mappa";
    [self.navigationController pushViewController:customViewController animated:YES];
    //[self.view addSubview:customViewController.view];
}

代码不起作用，但如果我使用第二种方法[self.view addSubview:customViewController.view];起作用，我不知道为什么。

Answer 1

这是因为您没有UINavigationController作为rootViewController。

AppDelegate.m

UINavigationController *navigation=[[UINavigationController alloc] initWithRootViewController:mainVC];
self.window.rootViewController=navigation;

Answer 2

尝试这样做：

ViewController *CustomViewController = [[ViewController alloc] init];    
[self presentViewController:CustomViewController animated:YES completion:nil];

按下按钮时切换视图

2 个答案: