UILongPressGestureRecognizer在Textfield上顯示警報

我有一個UILongPressGestureRecognizer添加到UITextField中。當我按下UITextField時，它顯示我警覺，但這是三個警告給我看。這是我的代碼：UILongPressGestureRecognizer在Textfield上顯示警報

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    UILongPressGestureRecognizer *gs = [[UILongPressGestureRecognizer  alloc]initWithTarget:self action:@selector(AlertServer:)]; 
    gs.delegate = self; 
    [_companyidTxt addGestureRecognizer:gs]; 
    [gs release]; 
} 
-(void)AlertServer:(UILongPressGestureRecognizer *)gs 
{ 
    alertView = [[UIAlertView alloc] initWithTitle:@"Server" message:@"" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"Okay", nil]; 
    alertView.alertViewStyle = UIAlertViewStylePlainTextInput; 
    myTextField = [alertView textFieldAtIndex:0]; 
    myTextField.text=mainString; 
    [alertView show]; 
    [alertView release]; 
    [alertView retain]; 
}

誰能解釋爲什麼出現這種情況，以及如何預防？ Thanx

來源

2013-10-31 kamlesh shingarakhiya

重複：http://stackoverflow.com/questions/3319591/uilongpressgesturerecognizer-gets-called-twice-when-pressing-down和內容：HTTP：//計算器。 com/questions/3243812/uilongpressgesturerecognizer-問題和這：http://stackoverflow.com/questions/15306942/uialertview-alert-repeat-three-times-within-long-press-gesture-recognizer?rq=1和這個： http://stackoverflow.com/questions/15727203/longpress-on-iphone-app-opens-3-alerts-alertview-or-gesture-code-issue?rq=1請在查詢之前檢查其他問題。 – fishinear

試試這個，的

- (void)AlertServer:(UILongPressGestureRecognizer*)sender { 
    if (sender.state == UIGestureRecognizerStateEnded) { 
     alertView = [[UIAlertView alloc] initWithTitle:@"Server" message:@"" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"Okay", nil]; 
    alertView.alertViewStyle = UIAlertViewStylePlainTextInput; 
    myTextField = [alertView textFieldAtIndex:0]; 
    myTextField.text=mainString; 
    [alertView show]; 
    [alertView release]; 

    } 
    else if (sender.state == UIGestureRecognizerStateBegan){ 
     NSLog(@"UIGestureRecognizerStateBegan."); 
    //Do Whatever You want on Began of Gesture 
    } 
    }

來源

2013-10-31 08:39:05 karthika

謝謝，我嘗試代碼，但它不工作:( –

根據您的觀察結果更改您的longPressGestureRecognizer.minimumPressDuration（時間間隔以秒爲單位，默認持續時間爲0.5秒）或使用某些標誌來檢查是否已顯示警報。

來源

2013-10-31 07:36:54

謝謝你，但它不工作:( –

UILongPressGestureRecognizer在Textfield上顯示警報

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