小编jla*_*jla的帖子

我在构建时遇到2个错误,它们位于AppDelegatem文件中

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

有两个错误的行:

self.viewController = [[ViewController alloc] initWithNibName:@"ViewController" bundle:nil];

ERROR1:

Receiver type "ViewController" for instance messages is a forward declaration

误差2:

Receiver "ViewController" for class messages is a forward declaration

警报线:

self.window.rootViewController = self.viewController;

警报:

Incompatible pointer types assigning to 'UIViewController *' from 'ViewController*'

如果需要,你可以找到ViewControllerm的文本文件ViewControllerh AppDelegatem这里 …