objective-c - Objective-C Thread 1:Program received signal: "SIGABRT"

Question

I have an error in this line.

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    // Override point for customization after application launch.
    [self.window addSubview:_viewController.view];
    [self.window makeKeyAndVisible];
    return YES;
}

I'm using Xcode 4.1 and reading Appress Book "Beginning iPhone 4 Development" Chapter 4.

Regards, Herman

Answer 1

检查您的 IBOutlets。查看它们是否都已连接，如果您看到!右侧有任何插座，则删除该插座，这意味着您之前已连接了插座，然后在标题中将其删除。这会导致 SIGABRT 崩溃。检查 IBActions 的相同内容。