Ios 简单委托方法不起作用

我们将非常感谢您的帮助

我有一个简单的项目用于测试：

我想在委托方法中传递NSString，但使用此代码不起作用

testDelegateViewController.h

@protocol testDelegateViewControllerDelegate; 


@interface testDelegateViewController : UIViewController {


id<testDelegateViewControllerDelegate> delegate;

IBOutlet UIButton *button;

}

@property (nonatomic, assign) id<testDelegateViewControllerDelegate> delegate;
@property (nonatomic, retain) IBOutlet UIButton *button;

- (void)pass;

@end

@protocol testDelegateViewControllerDelegate

- (void)passSomeToDelegate:(NSString *)some;

@end

AppDelegate.h

#import "testDelegateViewController.h"

@interface AppDelegate : NSObject <UIApplicationDelegate, testDelegateViewControllerDelegate> {

}

但在我的控制台中，当按下按钮时，不会打印任何内容

---

谢谢你忘了设置你的代表。您可以在

应用程序：didFinishLaunchingWithOptions:

方法中设置委托

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{   
    self.viewController.delegate = self;

    self.window.rootViewController = self.viewController;
    [self.window makeKeyAndVisible];
    return YES;
}

---

我添加了

self.viewController.delegate=self

设置委托。

您忘记设置委托。您可以在

应用程序：didFinishLaunchingWithOptions:

方法中设置委托

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{   
    self.viewController.delegate = self;

    self.window.rootViewController = self.viewController;
    [self.window makeKeyAndVisible];
    return YES;
}

---

我添加了

self.viewController.delegate=self

设置代理。

这对像我这样的初学者很有帮助。这对像我这样的初学者很有帮助。

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{   
    self.viewController.delegate = self;

    self.window.rootViewController = self.viewController;
    [self.window makeKeyAndVisible];
    return YES;
}