来自 AppDelegate 的警告

Question

当我调用其他视图控制器时，我收到以下警告。

WindowMultivewAppDelegate 可能不会响应 -switchView 来查看

这是我在 Firstviewcontroller.m 中的代码

- (IBAction)swapViews:(id)sender{

WindowMultiViewAppDelegate *delegate = (WindowMultiViewAppDelegate *)[[UIApplication       sharedApplication] delegate];
SecondViewController *secondView = [[SecondViewController alloc]    initWithNibName:@"SecondViewController" bundle:nil];
[delegate switchView:self toView:secondView.view];

 }

这是我在 Firstviewcontroller.h 中的代码

#import <UIKit/UIKit.h>


@interface FirstViewController : UIViewController {



}

- (IBAction)swapViews:(id)sender;

@end

appdelegate.m

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:     (NSDictionary *)launchOptions {    


 initWithNibName:@"FirstViewController" bundle:nil];
[self.window addSubview:navigationController.view];

locationManager = [[CLLocationManager alloc] init];
locationManager.distanceFilter = kCLDistanceFilterNone; // whenever we move
locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters; // 100 m
if ([CLLocationManager locationServicesEnabled]) {

    [locationManager startUpdatingLocation];     
}



[self.window makeKeyAndVisible];

return YES;
}

中的 appdelegate.h

@interface WindowMultiViewAppDelegate : NSObject <UIApplicationDelegate,     CLLocationManagerDelegate , MKMapViewDelegate> {
UIWindow *window;
UINavigationController *navigationController;

CLLocationManager *locationManager;



}


@property (nonatomic, retain) IBOutlet UIWindow *window;

@property (nonatomic, retain) IBOutlet CLLocationManager *locationManager;

@property (nonatomic, retain) IBOutlet UINavigationController *navigationController;

@end

我已将 UInavgationcontroller 放入 mainWindow.xib 中，这会导致我命名为 FirstViewController 的根视图控制器

当按下下一个按钮时，应用程序会在第二个视图控制器中停止，该按钮内部有该操作

- (IBAction)swapNext:(id)sender
{
WindowMultiViewAppDelegate *delegate = (WindowMultiViewAppDelegate *)[[UIApplication sharedApplication] delegate];
MediaViewController *mediaView = [[MediaViewController alloc] initWithNibName:@"MediaViewController" bundle:nil];
[delegate switchView:self toView:mediaView.view];

}

我做错了什么？

谁能告诉我如何将更多子视图连接到 UINavigationController 中 我希望其中一个子视图成为视频播放器 - 离线 - 另一个子视图成为查找用户位置的地图

我是初学者....当我知道我将帮助其他人时，谢谢大家： ））

Answer 1

我没有看到您在任何地方定义了 switchView: 方法，因此您收到有关此问题的警告也就不足为奇了。