不能按返回键隐藏键盘

Question

我的代码如下：

.h文件中：

    @interface TouchLabelViewController : UIViewController<UITextFieldDelegate>
@property (strong, nonatomic) IBOutlet UITextField *aTextField;        
-(IBAction)hideKeyboard:(id)sender;

.m文件：

-(IBAction)hideKeyboard:(id)sender{
    [(UITextField*)sender resignFirstResponder];
}

后来我还尝试了

.h文件：

- (void)viewDidLoad
{
    [super viewDidLoad];
    aTextField.delegate = self;
}
@property (strong, nonatomic) IBOutlet UITextField *aTextField;
-(BOOL) textFieldShouldReturn:(UITextField *)textField;

.m文件

-(BOOL) textFieldShouldReturn:(UITextField *)textField{

    [aTextField resignFirstResponder];
    return YES;
}

但是按返回键的时候，还是不能隐藏键盘啊

Answer 1

-(IBAction)hideKeyboard:(id)sender{
    [self. aTextField resignFirstResponder];
    ［self  aaaa];
}
-(void)aaaa{
   你要返回按钮做的事情；
}

或者是

-(IBAction)hideKeyboard:(id)sender{
    ［self  aaaa];
    你返回按钮要做的事情；
}
-(void)aaaa{
   [self. aTextField resignFirstResponder];
}