我正在制作一個具有UITextField的注冊Alertview，用戶可以在其中輸入其注冊號。一切都差不多，但是我想以編程方式從文本字段中刪除復(fù)制粘貼功能，因?yàn)樗鼈儾皇俏谋咀侄蔚腎nterfaceBuilder版本，所以我不知道該怎么做。到目前為止是我的UIalertview ...- (void)pleaseRegisterDevice {    UIAlertView *myAlertView = [[UIAlertView alloc] initWithTitle:@"Please Register Device!" message:@"this gets covered" delegate:self cancelButtonTitle:nil otherButtonTitles:@"OK", nil];    regTextField = [[UITextField alloc] initWithFrame:CGRectMake(12.0, 45.0, 260.0, 25.0)];    [regTextField setBackgroundColor:[UIColor whiteColor]];    regTextField.textAlignment = UITextAlignmentCenter;    [myAlertView addSubview:regTextField];    [myAlertView show];    [myAlertView release];}