The navigation bar can response the pan gestures in ZUUIRevealController. But I want to make the whole screen of frontViewController response the pan gestures like Path2, so I write code like this:
UIPanGestureRecognizer *recognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self.navigationController.parentViewController action:#selector(revealGesture:)];
[self.view addGestureRecognizer:recognizer];
It works fine except in UITableViewController. When I put it in viewDidLoad method of UITableViewController, the table can not response any other pan gestures, so it can not scroll.
How can I make it work like Path2: pan it horizontally is to reveal, and vertically is to works like normal table view?
There is a simple solution:
in the frontViewController:
- (void)viewDidLoad
{
...
UIPanGestureRecognizer *recognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self.navigationController.parentViewController action:#selector(revealGesture:)];
recognizer.delegate = self;
...
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
return TRUE;
}
Related
I have added Long Tap gesture on UIWebView. But I want UIWebView to process a standard Tap event before my Long Tap will be recognized. (Two gestures should be processed on Long Tap - a simple Tap and my Long Tap). How to do this?
I think it's required to send Tap event to UIWebView on TouchBegin. Is it correct?
The correct code:
- (void)viewDidLoad {
UILongPressGestureRecognizer* gesture = [[[UILongPressGestureRecognizer alloc] initWithTarget:self action:#selector(handleLongPress:)] autorelease];
gesture.delegate = self;
[myWebView addGestureRecognizer:gesture];
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
return YES;
}
Please refer this section UIGestureRecognizerDelegate
http://developer.apple.com/library/ios/#documentation/uikit/reference/UIGestureRecognizerDelegate_Protocol/Reference/Reference.html
you found this is called when 2 gesture simultaneous work.
gestureRecognizer:shouldRecognizeSimultaneouslyWithGestureRecognizer:
I have created a webview to display the pdf, now using the gesture recognizer on single tap I have to call some method but single tap is not recognising
I have used this code
UIWebView *webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0, 450,450)];
UITapGestureRecognizer *DoubleFingerDTap = [[UITapGestureRecognizer alloc]
initWithTarget:self action:#selector(screenTappedtwice:)];
DoubleFingerDTap.numberOfTapsRequired = 1;
[webView addGestureRecognizer:DoubleFingerDTap];
[DoubleFingerDTap release];
method called
- (void)screenTappedtwice:(UIGestureRecognizer *)sender {
CGPoint tapPoint = [sender locationInView:sender.view.superview];
[UIView beginAnimations:nil context:NULL];
sender.view.center = tapPoint;
//Check the current state of the navigation bar...
//BOOL navBarState = [self.navigationController isNavigationBarHidden];
// Set the navigationBarHidden to the opposite of the current state.
// [self.navigationController setNavigationBarHidden:TRUE animated:YES];
[self.navigationController setNavigationBarHidden:YES animated:YES];
[UIView commitAnimations];
}
Have you tried setting:
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer;
to return YES? Also, ensure you set your tap gesture's delegate to self so that the message is properly received. I just tested this in a new project and it does work.
EDIT
Not quite sure what your animation begin & commit is for - the method setNavigationBarHidden:animated: animates itself. Additionally, the use of these animation definitions are discouraged in iOS 4 onwards - look into using block-based animations on UIView instead.
For your navigation controller, you are pretty much there - implement something like this:
- (void)screenTappedTwice:(UITapGestureRecognizer *)sender
{
BOOL shouldHideNavBar = [self.navigationController isNavigationBarHidden] ? NO : YES;
[self.navigationController setNavigationBarHidden:shouldHideNavBar animated:YES];
}
I've got an app that displays a page of text with the ability to tap a button or swipe in a view to advance or retreat through various pages. The container view has two UISwipeGestureRecognizers attached, for swipe left and swipe right. No trouble with these gestures. But now I'm trying to add UITapGestureRecognizer to another view, providing an ability similar to iBooks or the Kindle app, tap the left to go back, the right to go forward. Nothing I do can get the gesture to fire. No hint that it is ever being triggered, even if I put the gesture on my topmost view and disable other gestures.
The view controller implements UIGestureRecognizerDelegate, though I've not needed to implement delegate methods. I did try implementing shouldReceiveTouch: without success.
Here's a snippet of code where I create and attach the gesture recognizer:
UITapGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(tapGestureTurnPage:)];
[self.view addGestureRecognizer:recognizer];
[recognizer release];
Try this on the view you're adding the gesture recognizers:
view.userInteractionEnabled = YES;
You mention that you've tried this, but just in case go through it again.
Try using the delegate with <UIGestureRecognizerDelegate> in the header and then setting the delegate:
UITapGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(tapGestureTurnPage:)];
[self.view addGestureRecognizer:recognizer];
recognizer.delegate = self;
[recognizer release];
Then implement this method:
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer
shouldReceiveTouch:(UITouch *)touch {
return YES;
}
Then use a debugger or toss an NSLog into the above method and also tapGestureTurnPage: to see if these methods are being called.
Add this where you initialize the gesture:
recognizer.delegate = self;
and add this in the "self" class:
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
return YES;
}
This allows me to have gestures recognized on the UIWebView, and the UIWebView will still respond to the taps. (which i wanted - you may not)
Hello I have an opengl view and on that I have a tab bar. I'm using a tap recognizer to tap different 3d objects on screen. In the tab bar I have a button but it doesn't work because the tap recognizer catches these taps too. How do I stop this? I've already tried this:
- (BOOL) gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
if ([touch.view isKindOfClass:[UIBarButtonItem class]]) return FALSE;
return TRUE;
}
I think I am somehow comparing wrong classess because when I debug it returns TRUE always.
Or you can just do [singleTap setCancelsTouchesInView:NO]. Example:
UITapGestureRecognizer *singleTap = [
[UITapGestureRecognizer alloc]
initWithTarget: self
action: #selector(yourSelector:)
];
[singleTap setCancelsTouchesInView:NO];
[[self view] addGestureRecognizer: singleTap];
if ([touch.view.superview isKindOfClass:[UIToolbar class]]) return FALSE;
This is how I got it to work. The superview is a UIToolbar, probably UIBarButtonIttem is a view after all.
I have an application with UIScrollView added as a subview of UIView. This Scroll view has a textfield with keyboard type set to numberPad.
Now the problem is , i want to dismiss the keyboard when i tap anywhere else in the scroll view. how can i do this ... ?
Just call the textField's resignFirstResponder in the touch handler.
(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
[myTextField resignFirstResponder];
}
When I added the gesture to a subclass of UIScrollView, I was having problems with the various gestures in my view tree interfering with each other, such as being able to click on subviews, scroll the view, and have the keyboard dismiss in all cases. I came up with this solution, which can be setup from a superclass of UIScrollView or from a UIViewController.
The DismissKeyboardTapGesture class uses ARC, works with any text fields under the view, and doesn't take over any clicks from subviews like buttons. Also takes advantage of iOS7 scrolling effect to dismiss keyboard.
Setting up from UISScrollView superclass:
_dismissKeyboard = [[DismissKeyboardTapGesture alloc] initWithView:self];
or from UIViewController:
_dismissKeyboard = [[DismissKeyboardTapGesture alloc] initWithView:self.view];
Here is the class:
#interface DismissKeyboardTapGesture : NSObject <UIGestureRecognizerDelegate>
#end
#implementation DismissKeyboardTapGesture
- (id)initWithView:(UIView *)view
{
self = [super init];
if (self) {
UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(singleTap:)];
singleTap.cancelsTouchesInView = NO;
singleTap.delegate = self;
[view addGestureRecognizer:singleTap];
if ([view respondsToSelector:#selector(setKeyboardDismissMode:)]) {
// Bonus effect to dismiss keyboard by scrolling
((UIScrollView *)view).keyboardDismissMode = UIScrollViewKeyboardDismissModeInteractive;
}
}
return self;
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
// Don't stop any existing gestures in our view from working
if (otherGestureRecognizer.view == gestureRecognizer.view) {
return YES;
}
return NO;
}
- (void)singleTap:(UIGestureRecognizer*)gestureRecognizer
{
// Close keyboard for any text edit views that are children of the main view
[gestureRecognizer.view endEditing:YES];
}
#end