無法連接IBAction查看

Question

我是iOS新手，我正在關注this tutorial。

下面是我試圖將IBAction連接到我的視圖的屏幕截圖。

我想在每次觸摸視圖（即關閉鍵盤）時執行方法releaseKeyboard。

我不使用故事板。

我的文件：

• challAppDelegate.h
• challAppDelegate.m
• challViewController.h
• challViewController.m
• challViewController.xib

challAppDelegate.h

#import <UIKit/UIKit.h> 

@interface challAppDelegate : UIResponder <UIApplicationDelegate> 
{ 
    UINavigationController *navigationController; 
} 

@property (strong, nonatomic) UIWindow *window; 
@property (strong, nonatomic) UINavigationController *navigationController; 

@end 

challAppDelegate.m

#import "challAppDelegate.h" 
#import "challViewController.h" 

@implementation challAppDelegate 

@synthesize window = _window; 
@synthesize navigationController; 

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 
{ 
    UIViewController *rootController = 
    [[challViewController alloc] 
    initWithNibName:@"challViewController" bundle:nil]; 

    navigationController = [[UINavigationController alloc] 
          initWithRootViewController:rootController]; 

    self.window = [[UIWindow alloc] 
        initWithFrame:[[UIScreen mainScreen] bounds]]; 
    [self.window addSubview:navigationController.view]; 
    [self.window makeKeyAndVisible]; 
    return YES; 

} 
... 
... 

challViewController.h

#import <UIKit/UIKit.h> 

@interface challViewController : UIViewController 

@property(nonatomic, retain) IBOutlet UITextField *signInEmailAddress; 
@property(nonatomic, retain) IBOutlet UITextField *signInPassword; 

@property(nonatomic, retain) IBOutlet UIButton *signInSignInButton; 
@property(nonatomic, retain) IBOutlet UIButton *signInRegisterButton; 

-(void) releaseKeyboardAction; 

-(IBAction) signInAction:(int)sender; 

-(IBAction) registerAction:(int)sender; 

-(IBAction) releaseKeyboard:(id)sender; 

@end 

challViewController.m

#import "challViewController.h" 

@interface challViewController() 

@end 

@implementation challViewController 

@synthesize signInEmailAddress; // cria os getters e setters 
@synthesize signInPassword; // cria os getters e setters 

@synthesize signInSignInButton; // cria os getters e setters 
@synthesize signInRegisterButton; // cria os getters e setters 

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil 
{ 
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; 
    if (self) { 
     // Custom initialization 
    } 
    return self; 
} 

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view from its nib. 

    self.title = @"Sign In"; 
} 

- (void)didReceiveMemoryWarning 
{ 
    [super didReceiveMemoryWarning]; 
    // Dispose of any resources that can be recreated. 
} 

- (void)releaseKeyboardAction 
{ 
    [signInEmailAddress resignFirstResponder]; 
    [signInPassword resignFirstResponder]; 
} 

- (IBAction)releaseKeyboard:(id)sender 
{ 
    [self releaseKeyboardAction]; 
} 

- (IBAction)registerAction:(int)sender 
{ 
    // 
} 

- (IBAction)signInAction:(int)sender 
{ 
    // 
} 

@end 

我做錯了什麼？

感謝

Answer 1

您可以添加到UITapGestureRecognizerself.view。

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view from its nib. 

    self.title = @"Sign In"; 

    UITapGestureRecognizer *gesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(releaseKeyboardAction)]; 
    [self.view addGestureRecognizer:gesture]; 
} 

手勢識別器指向你的releaseKeyboardAction方法的目標。

Answer 2

只需在身份檢查員中將視圖的類從UIView更改爲UIControl，然後就可以連接IBActions。