关闭UITextField上的键盘

Question

我是iOS设备的新手.我在InterfaceBuilder上插入了一个UITextField,并分配了代码:

@interface ComposeViewController : UIViewController {
 id <ComposeViewControllerDelegate> delegate;
 IBOutlet UITextField *notificationTitle;
}

当用户按下"返回"键时,如何关闭键盘？

Answer 1

将UITextField的Delegate设置为ViewController,在File的Owner和UITextField之间添加一个引用插座,然后实现此方法:

- (BOOL)textFieldShouldReturn:(UITextField *)textField {
   if (textField == yourTextField) {
       [textField resignFirstResponder];
   }
   return NO;
}

Answer 2

继承UITextFieldDelegate协议在viewDidLoad方法集中:

yourTextField.delegate = self

实现下面的委托方法:

- (BOOL)textFieldShouldReturn:(UITextField *)textField
{ 
   [yourTextField resignFirstResponder];
   return NO;
}