iOS，無法在viewDidLoad之外進行委托

Question

我有這個appdelegate.h

#import <UIKit/UIKit.h>
@interface appDelegate : NSObject <UIApplicationDelegate> {
  UIWindow *window;
  NSString *name;

}
@property (nonatomic, retain) NSString *name;
@end

和.m文件

@synthesize name;

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

    name=@"john";
    return YES;
   }

現在...我想從另一個控制器獲取這個名稱，如果我嘗試在我的viewDidLoad方法中調用它，它就可以工作。

- (void)viewDidLoad
{
    appDelegate *test= (appDelegate *)[[UIApplication sharedApplication] delegate];
    NSLog(@"%@", test.name);
}

但是如果我嘗試在initWithNibName中做同樣的事情，那將是行不通的...

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
    {
        appDelegate *test= (appDelegate *)[[UIApplication sharedApplication] delegate];
        NSLog(@"%@", test.name);
    }

有人可以幫我嗎？ 這個問題使我發瘋...

Answer 1

如果要覆蓋-initWithNibName:需要返回該類的實例（或self ）； 在-initWithNibName:嘗試以下代碼-initWithNibName: 它為我工作。

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    appDelegate *test= (appDelegate *)[[UIApplication sharedApplication] delegate];
    NSLog(@"%@", test.name);

   if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) {

   }
   return self;
}

我認為這可能對您有用。