I adding subviews programmatic. for each subview I'm adding a gesture reconognizer:
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
imageView.frame = CGRectMake((position*1024)+200,0,image.size.width,image.size.height);
UITapGestureRecognizer *singleFingerTap = [[UITapGestureRecognizer alloc]
initWithTarget:self action:#selector(singleFingerTap:)];
singleFingerTap.numberOfTapsRequired = 1;
[imageView addGestureRecognizer:singleFingerTap];
[singleFingerTap release];
but the tap is not responding how can I verify the gesture has been add it to the subview ?
Add this after your code:
NSLog(#"imageView.gestureRecognizers: %#", [imageView.gestureRecognizers description]);
If you have properly added gestureRecognizers it will print the description of each to the console. If not, it will show (NULL) or an empty array in the console.
You can also set the gesture recognizer delegate:
[singleFingerTap setDelegate:self];
Then add the delegate method and set a break point to make sure it is getting called:
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer {
NSLog(#"gestureRecognizerShouldBegin: called");
return YES;
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
NSLog(#"shouldReceiveTouch: called");
return YES;
}
Related
I'm trying to add UITableView inside UIView but I got problem with gesture recognizer. This is my code:
_subView = [[UIView alloc] initWithFrame:CGRectMake(0, screenRect.size.height-100, screenRect.size.width, 300)];
_subView.backgroundColor = [UIColor colorWithRed:0.110f green:0.192f blue:0.298f alpha:1.00f];
[self.view addSubview:_subView];
UITapGestureRecognizer *singleFingerTap =
[[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(subViewToggle)];
[_subView addGestureRecognizer:singleFingerTap];
_moreTable = [[UITableView alloc] initWithFrame:CGRectMake(0,50, screenRect.size.width, 240)];
//Transforme to HOR scroll ;
CGRect frame = _moreTable.frame;
_moreTable.transform = CGAffineTransformRotate(CGAffineTransformIdentity, k90DegreesCounterClockwiseAngle);
_moreTable.frame = frame;
[_moreTable registerNib:[UINib nibWithNibName:#"MoreTableViewCell" bundle:nil] forCellReuseIdentifier:#"moreCell"];
_moreTable.backgroundColor = [UIColor groupTableViewBackgroundColor];
_moreTable.delegate = self;
_moreTable.dataSource = self;
[_subView addSubview:_moreTable];
[_subView bringSubviewToFront:_moreTable];
The problem is when I click on table cell instead of executing didSelectRowAtIndexPath method he execute the subViewToggle Method. I tried to bring my tableView to front but didn't help
your tap gesture eat the touch. there are two way you can deal:
first, you can implement - gestureRecognizer:shouldReceiveTouch: delegate method, and decide if tap gesture should occur.
second, you also can set cancelsTouchesInView property of tap to NO, so tableView will receive touch. but tap will receive touch at the some time too.
Try implementing the UIGestureRecognizerDelegate protocol's gestureRecognizer:shouldRecognizeSimultaneouslyWithGestureRecognizer:
This should call both your didSelectRow and GestureRecognizer
https://developer.apple.com/library/prerelease/ios/documentation/UIKit/Reference/UIGestureRecognizerDelegate_Protocol/index.html#//apple_ref/occ/intfm/UIGestureRecognizerDelegate/gestureRecognizer:shouldRecognizeSimultaneouslyWithGestureRecognizer:
Please try to use like this
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
if ([touch.view == _moreTable]) {
return NO;
}
return YES;
}
To solve this Problem I've changed the UIView Gesture from single finger tap to moveUP and moveDown gesture.
Note that I've tried only #dharmbir Solution and It haven't worked for me.
Update Also this solution, implementing the shouldReciveTouches, worked for the tapGesture and her's the code snippet :
-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
// UITableViewCellContentView => UITableViewCell
if([touch.view.superview isKindOfClass:[UITableViewCell class]]) {
return NO;
}
// UITableViewCellContentView => UITableViewCellScrollView => UITableViewCell
if([touch.view.superview.superview isKindOfClass:[UITableViewCell class]]) {
return NO;
}
return YES;
}
//Create tap gesture for menu transparent view
UITapGestureRecognizer *rightTableTransparentViewTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(rightTableTransparentViewTapMethod:)];
[rightTableTransparentViewTap setCancelsTouchesInView:NO];
[_rightTableTransparentView addGestureRecognizer:rightTableTransparentViewTap];
- (void)rightTableTransparentViewTapMethod:(UITapGestureRecognizer *)recognizer {
//Write your code here
}
Facing trouble with UITableViewCell.I tried to get the data of selected UITableViewCell. Initially it is working good but after the UITapGestureRecognizer its making this trouble. The table i've used is assigned to the one subview even few buttons are not taking the action at first click. I am facing this trouble exactly after adding the UITapGestureRecognizer.
tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self
action:#selector(didTapAnywhere:)];
[tapRecognizer setNumberOfTapsRequired:1];
[tapRecognizer setNumberOfTouchesRequired:1];
[self.view addGestureRecognizer:tapRecognizer];
[self.scrolling addGestureRecognizer:tapRecognizer];
[self.notesView addGestureRecognizer:tapRecognizer];
-(void)didTapAnywhere: (UITapGestureRecognizer*) recognizer {
[ageview removeFromSuperview];
[contiView removeFromSuperview];
[CountryTableview removeFromSuperview];
[notesView endEditing:YES];
[self.view endEditing:YES];
}
Your Tap Guesture is cancelling the touch guesture to your cell and your Buttons, make sure that the view to which you are assigning a tap guesture does not overlap the buttons which would result in cancellation of touch events
Did you implement delegate method of UIGestureRecognizerDelegate
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
UIView *view = (UIView *)touch.view;
if([view isKindOfClass:[<YOUR_BUTTON> class]]) {
return NO;
}
return YES;
}
OR you can give some tag to button like following
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
UIView *view = (UIView *)touch.view;
if(view.tag == 10000) {
return NO;
}
return YES;
}
I'm trying to add a UILongPressGestureRecognizer and a UITapGestureRecognizer to an IBOutletCollection of UIImageViews, but it's not working. Here's the code I'm using:
UILongPressGestureRecognizer *pressRecognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:#selector(deleteImage:)];
UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(selectImage:)];
pressRecognizer.delegate = self;
tapRecognizer.delegate = self;
for (UIImageView *imageView in myImageViewCollection)
{
[imageView addGestureRecognizer:pressRecognizer];
[imageView addGestureRecognizer:tapRecognizer];
imageView.userInteractionEnabled = YES;
}
- (void)selectImage:(UITapGestureRecognizer *)sender
{
NSLog(#"Select");
}
- (void)deleteImage:(UILongPressGestureRecognizer *)sender
{
NSLog(#"Delete");
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
return YES;
}
I've conformed to the UIGestureRecognizerDelegate. What am I doing wrong?
Refer to this question. Sounds like the same issue. I recreated your problem and the gesture recognizers are only bound to the last view.
Hello everyone I have a uitapgesture on my view using the following code :
UITapGestureRecognizer *tap= [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(TAPGestureRecognizer)];
tap.numberOfTapsRequired=1;
tap.delegate = self;
[self.view addGestureRecognizer:tap];
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
return YES;
}
And I have a uiwebview as a subview in my UIview. The problem is that on the uivewview HTML it had a onclick(); which in turn is calling the tapgesture. Any help?
FirstView.image=[UIImage imageNamed:#"shape1.jpg"];
FirstView.tag=1;
FirstView.userInteractionEnabled=YES;
[FirstView addGestureRecognizer:[[UITapGestureRecognizer alloc]initWithTarget:self action:#selector(firstimagetouch:)]];
SecondWebView.tag=2;
SecondWebView.userInteractionEnabled=YES;
[SecondWebView addGestureRecognizer:[[UITapGestureRecognizer alloc]initWithTarget:self action:#selector(firstimagetouch:)]];
-(void)firstimagetouch:(UIGestureRecognizer *)sender
{
UIView * view=sender.view;
NSLog(#"%ld",(long)view.tag);
}
try like this first add gesture recognizer to view and then your webview according to give him tag value and get tag value. and do what you want.
I have a subview of imageview with a PanGestureRecognizer, and the main view has a LongPressGestureRecognizer. I have added the longpress only to the view like this:
screenRecognize = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:#selector(screenTaped:)];
screenRecognize.minimumPressDuration = 0.0;
self.userInteractionEnabled = YES;
[self addGestureRecognizer:screenRecognize];
And here's the imageview:
imageViewPanRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:#selector(imageViewPulled:)];
imageView = [[UIImageView alloc] initWithFrame:CGRectMake(310, 50, 10, 40)];
imageView.image = [UIImage imageNamed:#"image.png"];
imageView.userInteractionEnabled = YES;
[imageView addGestureRecognizer:imageViewPanRecognizer];
[self addSubview:imageView];
When I touch the imageView, the UILongPressRecognizer is fired. Why is this?
The answer is already in your question. You set
screenRecognize.minimumPressDuration = 0.0;
that means, UILongPressGestureRecognizer will work as like UITapGestureRecognizer. By the line
[self addGestureRecognizer:screenRecognize];
you active this gesture on all over the self.
Now when you add imageView in the self, the imageView will also response to the UILongPressGestureRecognizer as well as UIPanGestureRecognizer which is only active on the imageView. As a result touching on the imageView is firing UILongPressGestureRecognizer.
To solve this problem you can try by increasing the minimumPressDuration value.
1) Why you use long gesture with minimumPressDuration=0? Can not properly use pan gesture?
2) If you want that gestures work together, try something like this:
longGesture.delegate = self;
...
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
return YES;
}
3) If you whan if user pan to UIImageView long gesture disable, try something like this:
self.tag = 1;
longGesture.delegate = self;
...
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
return touch.view.tag == 1;
}