线程1：AppDelegate.m文件中的断点1.3错误

Question

我的AppDelegate.m文件中出现运行时错误;项目编译正常，但不会在iOS模拟器中显示。在文件中，我得到一个绿色箭头说线程1：断点1.3错误，我无法弄清楚。

当它完成运行时，我得到一个指向此行的堆栈跟踪，但是没有发现代码有任何问题。我已经注意到了问题所在的界限。你能告诉我什么是错的吗？

WhereamiAppDelegate.m

#import "WhereamiAppDelegate.h"

#import "WhereamiViewController.h"

@implementation WhereamiAppDelegate

@synthesize window = _window;
@synthesize viewController = _viewController;

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
  self.viewController = [[WhereamiViewController alloc] initWithNibName:@"WhereamiViewController" bundle:nil];
  self.window.rootViewController = self.viewController;
    [self.window makeKeyAndVisible]; // Thread 1: breakpoint 1.3
    return YES;
}

- (void)applicationWillResignActive:(UIApplication *)application
{
  // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
  // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
}

- (void)applicationDidEnterBackground:(UIApplication *)application
{
  // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later. 
  // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
}

- (void)applicationWillEnterForeground:(UIApplication *)application
{
  // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
}

- (void)applicationDidBecomeActive:(UIApplication *)application
{
  // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
}

- (void)applicationWillTerminate:(UIApplication *)application
{
  // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}

@end

Answer 1

检查您的xib文件是否仍然链接的已删除插座：

我想要检查的第一个优先级是你的根视图控制器的xib文件WhereamiViewController.xib