resignFirstResponder无响应

Question

我有一个名为＆＃34; fieldPassword＆＃34;的文本字段。宣布为IBOutlet

@property (strong, nonatomic) IBOutlet UITextField *fieldPassword;

我稍后合成它然后，试图让返回键关闭键盘，我有：

- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
   fieldPassword.delegate = self;
   [fieldPassword resignFirstResponder];
   [self.view endEditing:YES];

   return YES;
}

问题是当我运行模拟器并在指定的文本字段中点击返回键时，没有任何反应。以前，我在fieldPassword.delegate = self;中也有-viewDidLoad，并且在模拟器崩溃时出现unrecognized selector错误。

非常感谢任何帮助！

Answer 1

应该是[self.fieldPassword resignFirstResponder];而不是[fieldPassword resignFirstResponder];

同样self.fieldPassword.delegate = self;应位于viewDidLoad或viewDidAppear

Answer 2

如果您之前没有设置代理，则无法获得委托回调。请在viewDidLoad中尝试此操作：

self.fieldPassword.delegate = self;

您之前可能错过了self。

Answer 3

遵循以下内容

  1.Go to xib or storyboard where you have set that your view.

  2.Right Click the TextField.If you click that you can see the 

       Outlets->Delegate with Empty Circle

  3.Just connect with File's  Owner.It is Yellow Color.

       Once you do this,the circle is not empty.It is filled now.

  4.Then go to declaration or .h part


       #import <UIKit/UIKit.h>

       @interface ViewController : UIViewController<UITextFieldDelegate>

 5.Then in .m

       -(BOOL)textFieldShouldReturn:(UITextField *)textField

       {

          [textField resignFirstResponder];

           return YES;
        }