通知

//點擊後取消所有的編輯狀態
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
//可以直接寫在UIViewController當中
{
 [self.view endEditing:YES];
}

 //利用textField的delegate Implement UITextFieldDelegate: @interface yourClass : UIViewController Use the delegate method: 
- (BOOL)textFieldShouldReturn:(UITextField *)textField{ 

 //do whatever you need here 
 //maybe you have several textFields, so first check which one was hit the return key: 
 if(textField == outlet_to_your_textField_1){ //do this }
 else if(textField == outlet_to_your_textField_2){ //do that }
 else if .... blablabla and so on return YES; 
}