Question

您好我有didFinishLaunching方法的问题。我真的对这个问题感到困惑，这就是我粘贴所有代码的原因。问题是应用程序没有启动，它崩溃了，它在控制台中显示了这条消息：

**[Demo1AppDelegate setMapViewController:]: unrecognized selector sent to instance 0x5649a30
2011-05-25 14:17:58.724 Demo1[10630:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[Demo1AppDelegate setMapViewController:]: unrecognized selector sent to instance 0x5649a30'**

我正在使用此代码在Demo1appDelegate.h文件中

#import <UIKit/UIKit.h>
#import "MapViewController.h"

@interface Demo1AppDelegate : NSObject <UIApplicationDelegate> {
    UIWindow *window;
    MapViewController *mapViewController;
}

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

@end

并且在 Demo1AppDelegate.m文件

#import "Demo1AppDelegate.h"
@interface Demo1AppDelegate ()
@property (nonatomic, retain) MapViewController *mapViewController;
@end

@implementation Demo1AppDelegate

@synthesize window;


#pragma mark -
#pragma mark Application lifecycle

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

    MapViewController *viewController = [[MapViewController alloc] init];
    self.mapViewController = viewController;

    [viewController release];

    [window addSubview:self.mapViewController.view];
    [window makeKeyAndVisible];

    return YES;
}


- (void)dealloc {
    [mapViewController release];

    [window release];
    [super dealloc];
}


@end

Answer 1

我认为

self.mapViewController = viewController;

是问题所在。您@synthesize没有mapViewController。因此，您无法通过self

进行访问

或另一种选择是试试这个

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

    mapViewController = [[MapViewController alloc] init];
    [window addSubview:mapViewController.view];
    [window makeKeyAndVisible];

    return YES;
}

Answer 2

您需要实施UIApplication

更改

@interface Demo1AppDelegate : NSObject

到

@interface Demo1AppDelegate : NSObject  < UIApplicationDelegate>

这将解决您的问题

Answer 3

问题在于此行self.mapViewController = viewController;

你忘记了@synthesize mapViewController;

Answer 4

你必须在Demo1AppDelegate.m

中@synthesize mapViewController;

您还应该在Demo1AppDelegate.m的[mapViewController release];方法中添加dealloc（mapViewController是一个实例变量）。

Answer 5

合成地图视图控制器。

Answer 6

添加委托如下......这可能是问题所在： @interface Demo1AppDelegate : NSObject <UIApplicationDelegate>

Answer 7

尝试添加

@class MapViewController

在Demo1AppDelegate.h中的@implementation Demo1AppDelegate

之前

Answer 8

喂！添加子视图的位置

[window addSubview:self.mapViewController.view]; [window makeKeyAndVisible];

尝试没有“自我”

[window addSubview:mapViewController.view]; [window makeKeyAndVisible];

只是一个飞跃的猜测。

在iphone的应用中，DidFinishLaunching问题

8 个答案: