UILongPressGestureRecognizer不工作

Question

我想檢測UILongPressGestureRecognizer爲UIWebView分接開關不放..such，當我長按近3秒鐘，然後下面的if條件應該是True那麼只有
if (navigationType == UIWebViewNavigationTypeLinkClicked && longGesture)但它不工作... 。它繼續在迴路每次..does爲longPressGesture不及時檢查...

即使我已經與條件試過..

if (navigationType == UIWebViewNavigationTypeLinkClicked && longGesture.minimumPressDuration> 3)

不working..where我會犯錯..

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType 
{ 


UILongPressGestureRecognizer *longGesture = [[UILongPressGestureRecognizer alloc] init]; 

longGesture.numberOfTapsRequired = 1; 
longGesture.numberOfTouchesRequired = 1; 
longGesture.minimumPressDuration = 3 
; 
longGesture.delegate = self; 
// longGesture.allowableMovement = 50; 

[self.webView addGestureRecognizer:longGesture]; 



if (navigationType == UIWebViewNavigationTypeLinkClicked && longGesture) 
{ 
    // Call your custom actionsheet and use the requestURL to do what you want :) 


    UIActionSheet *sheet = [[UIActionSheet alloc] 
          initWithTitle:@" OPTIONS " 
          delegate:self 
          cancelButtonTitle:nil 
          destructiveButtonTitle:nil 
          otherButtonTitles:nil]; 


    [sheet addButtonWithTitle:@"Open"]; 
    [sheet addButtonWithTitle:@"Copy"]; 

    // Set cancel button index to the one we just added so that we know which one it is in delegate call 
    // NB - This also causes this button to be shown with a black background 
    sheet.cancelButtonIndex = sheet.numberOfButtons-1; 

    [sheet showInView:webView]; 
    return NO; 
    } 

Answer 1

你應該能夠同時手勢識別，因爲UIWebView中設置了幾個識別器本身，你會被跳過： 在代碼中添加此

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer 
{ 
    return YES; 
} 

Answer 2

你沒有爲你的手勢識別器設置目標動作，對嗎？

UILongPressGestureRecognizer *longGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressGestureUpdated:)]; 

設置一個目標動作會讓你得到通知，如果手勢觸發或沒有！ 我首先用這種方法開始檢查是否調用了「longPressGestureUpdated」方法。

請嘗試以下的定義可能：

longPGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressGestureUpdated:)]; 
    longPressGesture.numberOfTouchesRequired = 1; 
    longPressGesture.delegate = self; 
    longPressGesture.cancelsTouchesInView = NO; 

（而且可以同時進行手勢識別爲銀河建議的話）

Answer 3

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(handleLongPress:)]; 
    longPress.numberOfTouchesRequired = 1; 
    [self.view addGestureRecognizer:longPress]; 
} 

-(void)handleLongPress:(UILongPressGestureRecognizer *)gesture 
{ 
    if (gesture.state == UIGestureRecognizerStateBegan) 
    { 
    UIActionSheet *sheet = [[UIActionSheet alloc] 
         initWithTitle:@" OPTIONS " 
         delegate:self 
         cancelButtonTitle:nil 
         destructiveButtonTitle:nil 
         otherButtonTitles:nil]; 


    [sheet addButtonWithTitle:@"Open"]; 
    [sheet addButtonWithTitle:@"Copy"]; 

    // Set cancel button index to the one we just added so that we know which one it is in delegate call 
    // NB - This also causes this button to be shown with a black background 
    sheet.cancelButtonIndex = sheet.numberOfButtons-1; 

    [sheet showInView:webView]; 
    } 
}