iOS webview swipegesturerecognizer和缩放

Question

In my app i have a webview with left and right swipegesturerecognizers. The problem is when i zoom in webview. It seems that swipegesturerecognizers are disturbing the webview scrollview delegate and webview zoom works bad. How can i do this correctly?

- (void)viewDidLoad
{
  [super viewDidLoad];
  UISwipeGestureRecognizer *swipeRight = [[UISwipeGestureRecognizer alloc] initWithTarget:self  action:@selector(swipeRightAction:)];
  swipeRight.direction = UISwipeGestureRecognizerDirectionRight;
  swipeRight.delegate = self;
  [webView addGestureRecognizer:swipeRight];

  UISwipeGestureRecognizer *swipeLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeLeftAction:)];
  swipeLeft.direction = UISwipeGestureRecognizerDirectionLeft;
  swipeLeft.delegate = self;
  [webView addGestureRecognizer:swipeLeft];
}

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
  return YES;
}

- (void)swipeRightAction:(id)ignored
{
  NSLog(@"Swipe Right");
  //add Function
}

- (void)swipeLeftAction:(id)ignored
{
  NSLog(@"Swipe Left");
  //add Function
}

I solved it changing above delegate method with this one:

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

Answer 1

You've already answered your own question, but I'm going to add this answer for people who find this in the future:

If you only need to support iOS 8+, you can use WKWebView from the new WebKit framework, which replaces UIWebView . WKWebView supports back/forward swipes out of the box (you'll need to set its allowsBackForwardNavigationGestures property to YES (the default is NO )). This means you won't need to add your own gesture recognisers for back/forward swipes.

It behaves just like Safari, which means it nicely handles the distinction between a forward/back swipe and a zoom gesture.

Answer 2

I solved it changing above delegate method with this one:

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