I have add a view with button as a subview to MKAnnotationView
CCBigBubleViewController* buble = [[CCBigBubleViewController alloc] init];
[annotationView addSubView:buble.view];
It is shown perfectly, but the button does't respond to tapping.
In your implementation of MKAnnotationView, override the hitTest method:
- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event
{
if (CGRectContainsPoint(_button.frame, point)) {
return _button;
}
return [super hitTest:point withEvent:event];
}
Your button will then receive touch events.
your annotationView has probably not the right size. Out of it's frame subviews dont respond to touches. For testing this you can clip to bounds.
So make sure your button is inside the frame of your AnnotationView, perhaps sizeToFit will help here.
you will have to create button action in coding like this
[buttonInstance addTarget:self action:#selector(youraction:) forControlEvents:UIControlEventTouchUpInside];
Related
It seems that the button simply doesn't get pressed.
I tried:
UIPageViewController Gesture recognizers
However, here is the catch
if page transition of UIPageViewController is UIPageViewControllerTransitionStyleScroll then
self.view.gestureRecognizers = self.pageViewController.gestureRecognizers;
NSLog(#"%#",self.pageViewController.gestureRecognizers.description);
NSLog(#"%#",self.pageViewController.gestureRecognizers.description);
will simply be empty.
I tried adding my own gestureRecoqnizers instead of button into the UIViewControllers's subview. It still doesn't work.
So I have a UIPageViewController that display a UIViewController whose view has some button. How do I get that button pressed?
I also tried both solutions here:
http://emlyn.net/posts/stopping-gesture-recognizers-in-their-tracks
None works. First of all I cannot disable gesture recoqnizers of the UIPageViewController because there is no such thing. In scrollView mode, UIPageViewController doesn't have gesture recoqnizers.
I tried to add my own gesture recoqnizers to my own button but those are never called.
I want the UIPageViewController to still handle swipe though. But not tap.
I can't access the gesture recoqnizers of UIPageViewControllers because self.pageViewController.gestureRecognizers is empty. The UIPageViewController seems to just "absorb" all tap events. So my button doesn't get it.
I can add button in front of UIPageViewController but that button will absorb the swiping action which I want UIPageVIewController to still handle.
By the way if we uses the template from IOS (Create a page based app, and change the transition to scroll the pageviewcontroller.gesturerecoqnizers will be empty
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
// Configure the page view controller and add it as a child view controller.
self.pageViewController = [[UIPageViewController alloc] initWithTransitionStyle:UIPageViewControllerTransitionStyleScroll navigationOrientation:UIPageViewControllerNavigationOrientationHorizontal options:nil];//Turn this to scroll view
self.pageViewController.delegate = self;
SDDataViewController *startingViewController = [self.modelController viewControllerAtIndex:0 storyboard:self.storyboard];
NSArray *viewControllers = #[startingViewController];
[self.pageViewController setViewControllers:viewControllers direction:UIPageViewControllerNavigationDirectionForward animated:NO completion:NULL];
self.pageViewController.dataSource = self.modelController;
[self addChildViewController:self.pageViewController];
[self.view addSubview:self.pageViewController.view];
// Set the page view controller's bounds using an inset rect so that self's view is visible around the edges of the pages.
CGRect pageViewRect = self.view.bounds;
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) {
pageViewRect = CGRectInset(pageViewRect, 40.0, 40.0);
}
self.pageViewController.view.frame = pageViewRect;
[self.pageViewController didMoveToParentViewController:self];
// Add the page view controller's gesture recognizers to the book view controller's view so that the gestures are started more easily.
self.view.gestureRecognizers = self.pageViewController.gestureRecognizers;
NSLog(#"%#",self.pageViewController.gestureRecognizers.description); //This is empty
while (false);
}
Maybe you can set up a custom gesture recognizer in your UIPageViewController. This way, you will be able to filter through UITouch Events, by implementing this in your gesture recognizer delegate (the one for your UIPageViewController) :
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gesture shouldReceiveTouch:(UITouch *)touch {
if (touch.tapCount > 1) { // It will ignore touch with less than two finger
return YES;
}
return NO;
}
This, you will tell the UIPageViewController gestureRecognizer to not care about touch with one finger. You'll have to try it, but i think it might do the trick. The problem here is you have to ask your user for a two-finger swipe...
Check here for an other answer
I'm trying to implement a uitableview that its rows can be dragged to right and left (and show something behind them).
The code works fine, I've implemented it using the following methods:
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event;
My problem is that the rows also contain UIButtons that when clicking them- should be clicked but when dragging - should drag the entire cell.
I've found this solution. Basically to bubble up the events when clicking on the UIButtons:
[super touchesBegan:touches withEvent:event];
[self.nextResponder touchesBegan:touches withEvent:event];
But, it seems taht the event touchesMoved only bubbles once.
I've seen all sort of questions in this area. Example. But I don't see any solution or responses.
Any help, suggestion or creative workaround would be appreciated!
Instead of implementing touchesBegan, etc. why not use a UIPanGestureRecognizer? I tested this with just a simple rectangular view which was mostly covered by a UIButton. The view was dragged, no matter where I touched, and the button method fired if I clicked over the button.
#implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:#selector(handlePanGesture:)];
[self.theView addGestureRecognizer:panGesture]; //theView is IBOutlet for small view containing a button
}
-(void)viewDidAppear:(BOOL)animated {
self.currentViewFrame = self.theView.frame;
}
- (IBAction)handlePanGesture:(UIPanGestureRecognizer *)sender {
CGPoint translate = [sender translationInView:self.view];
CGRect newFrame = self.currentViewFrame;
newFrame.origin.x += translate.x;
newFrame.origin.y += translate.y;
sender.view.frame = newFrame;
if (sender.state == UIGestureRecognizerStateEnded)
self.currentViewFrame = newFrame;
}
-(IBAction)doClick:(id)sender {
NSLog(#"click");
}
Just check to see which one was touched using the tag system.
I want to close the keyboard, when a user do a single tap on uitextview and when he is in edit mode. Does anyone know how to do that?
touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event is not fired.
I can't use the textViewDidBeginEditing though.
Have included UITextViewDelegate in my header file. In .m file, I have set the delegate as self.textView.delegate = self and below is the code to capture touch event
- (void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
[super touchesBegan:touches withEvent:event];
if([self.textView isFirstResponder])
{
[self.textView resignFirstResponder];
}
}
But it is not getting called by the textView I am using.
When using Pinch and touch events you have to initialize the touch event. I can't remember of the top of my head but it is something like
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:nil];
tap.numberOfTapsRequired = 1;
put this in your viewDidLoad and then touchesBegan should get called when you tap the screen, Oh don't forget to add the (tapGesture) to the view like so
[self.view addGestureRecognizer:tapGesture];
Hope this helps.
I have a viewcontroller that via "[self.view addSubview: secondView.view]," adds a second view. The problem is that the second view is added outside half.
secondView = [[SecondView alloc] initWithFrame: CGRectMake (-160, 0, 320, 460)];
[self.view addSubview: secondView.view]; "
I have noticed, however, that the part before the 0 (-160) is not interagibile. Is this normal? is there a way to solve?
Thank you!
You can allow subviews to receive touches outside of the parent's bounds by overriding pointInside:withEvent: for the parent view.
- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event
{
BOOL pointInside = NO;
// step through our subviews' frames that exist out of our bounds
for (UIView *subview in self.subviews)
{
if(!CGRectContainsRect(self.bounds, subview.frame) && [subview pointInside:[self convertPoint:point toView:subview] withEvent:event])
{
pointInside = YES;
break;
}
}
// now check inside the bounds
if(!pointInside)
{
pointInside = [super pointInside:point withEvent:event];
}
return pointInside;
}
I fear that given the way the UIResponder chain works, what you want is not directly possible (the superview will only pass to its subviews the events that it recognizes as affecting itself).
On the other hand, if you really need to have this view outside of its parent's frame, you could associate a gesture recognizer (reference) to the subview. Indeed, gesture recognizers are handled outside the normal touch event dispatching and it should work.
Try this for a tap:
UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleSingleTap:)];
[secondView addGestureRecognizer:singleTap];
I'm using a custom UIGestureRecognizer subclass to track gestures on my InfoView class. The InfoView class is a subview of a custom UITableViewCell subclass called InfoCell.
I've added my gesture recognizer to my root view (the parent view of everything else on screen, because the purpose of my custom gesture recognizer is to allow dragging of InfoCell views between tables). Now, everything works as it should except one thing. I'm using the following code in my UIGestureRecognizer subclass to detect touches on the InfoView view:
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
UIView *touchView = [[touches anyObject] view];
if ([touchView isKindOfClass:[InfoView class]]) {
// Do stuff
}
The problem here is that the touches on the InfoView object are being intercepted, therefore they are not being forwarded to the UITableView which contains the InfoCell, which is the parent view of the InfoView. This means that I can no longer scroll the table view by dragging on the InfoView view, which is an issue because the InfoView covers the entire InfoCell.
Is there any way I can forward the touches onto the table view so that it can scroll? I've tried a bunch of things already:
[super touchesBegan:touches withEvent:event];
[touchView.superview.superview touchesBegan:touches withEvent:event]; (touchView.superview.superview gets a reference to its parent UITableView)
But nothing has worked so far. Also, the cancelsTouchesInView propery of my UIGestureRecognizer is set to NO, so thats not interfering with the touches.
Help is appreciated. Thanks!
Check out the UIGestureRecognizerDelegate method: - (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
If this returns YES it will prevent your gesture recognizer from stomping on the one that UIScrollView is using to detect scrolling.
UIGestureRecognizer has a property "cancelsTouchesInView" which is set to YES by default. This means that touches in a UIView are cancelled when a gesture is recognized. Try to set it to NO to allow the UIScrollView to receive further touch events.
I had a line in my touchesBegan method that set the state property of the gesture recognizer to UIGestureRecognizerStateBegan. Removing this line seems to fix the problem.
You can try add this notification
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer {
if ([gestureRecognizer class] == [UIPanGestureRecognizer class]) {
UIPanGestureRecognizer *panGestureRec = (UIPanGestureRecognizer *)gestureRecognizer;
CGPoint point = [panGestureRec velocityInView:self];
if (fabsf(point.x) > fabsf(point.y) ) {
return YES;
}
}
return NO;
}