//定義兩個文本框  
UITextField *textName; 
UITextField *textSummary; 
 
//點擊return 按鈕 去掉  
-(BOOL)textFieldShouldReturn:(UITextField *)textField 
{ 
    [textField resignFirstResponder]; 
    return YES; 
} 
//點擊屏幕空白處去掉鍵盤  
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event 
{ 
    [self.textName resignFirstResponder]; 
    [self.textSummary resignFirstResponder]; 
} 

摘自 like7xiaoben