how can i detect the touch event of an UIImageView
Hi, I have placed an image (UIImageView) on the navigation bar. Now I want to detect the touch event and want to handle the event. Could you let me know how can I do that? Thanks. ...
uitouch
Trying to reolve touch to location always returns zero (0) as x location.
While writing the touchesBegan handler for my view I ran into this interesting error. Code: ... UITouch *touch = [touches anyObject]; CGPoint point = [touch locationInView:self]; ... The problem is point.x is always zero, no matter where I "touch" and y is a huge number that flunctuates somewhere between 1070000000 and 1090000000. T...
possible to simulate a touch event instead of didSelectRowAtIndexPath
In my previous question I was asking for a next button and it had to act as if the cell was selected. Some decent answers were given and I was satisfied for the moment. However, I noticed that the actions behind my cells depend on a touch. Now, I read some stuff on the UITouch and I was wondering is it possible to simulate a touch here...
UITouch event or UIControlEvent for dragging through a set of images?
I have a grid of images. I want to create an effect so that when the finger dragging through "a line" of images, each image which is touched will do some event (say wobble for example) in the order of being touched. I tried to set the action:forControlEvents, but I couldn't find any appropiate UIControlEventxxx. I'm working in an UIVie...
Is there a way to fake a Touch into the system?
I discovered this: When a UIView's touchesBegan: method is fired and there is only one finger on the screen, the system will wait up to 0.25 seconds to see if the finger move far enough, before it will fire touchesMoved:. There is no programmatically way to get around this problem. But now the interesting part: If one finger is already ...
iPhone Objective C: How to get a pixel's color of the touched point on an UIImageView?
iPhone Objective C: How to get a pixel's color of the touched point on an UIImageView, even if the parent UIView or itself is being rotated by the CGAffineTransformMakeRotation function? Will the view property of the UITouch still correctly return the correct pixel of the touched point even if the UIView/UIImageView is being scaled and ...
Can I detect if higher subview has been touched?
I've got a big UIView that responds to touches, and it's covered with lots of little UIViews that respond differently to touches. Is it possible to touch anywhere on screen and slide around, and have each view know if it's being touched? For example, I put my finger down on the upper left and slide toward the lower right. The touchesBe...
Touch events not working on UIViews inside UIScrollView
Hi there, I have a series of UIViews inside a UIScrollView, and the UIViewControllers for those views are not receiving the touch events. If I take the views out of the scroll view then it works. I have enabled userInteraction on the views but it's still not working! This must be possible and I'd be really grateful if someone could po...
How to "transfer" first responder from one UIView to another?
I have a UIView subclass (CustomView for purposes of this question) that has its own handling of all touches events (Began, Moved, Ended, Cancelled). I also have a UIButton that is a sibling of CustomView that overlaps it. For example, my view hierarchy looks like this: UIView (Controller's view) CustomView with frame (0, 0, 300, 300...
Why won't my iPhone app debug from XCode?
After having a hell of a time trying to get my certificate to work, I finally deployed the app to my iTouch. However, if I try to run it via Build and Go, the app just displays with a blank screen. None of the breakspoints are hit (yes, I am in Debug mode). If I disconnect XCode and just run the app from the device by tapping it, it w...
Finding touch point in Objective c/cocoa touch
I have a problem to find the touch point. I have a function loadView() where I set 16 tiles(16 UIImage View). Then In function: - (void) touchesBegan:(NSSet*)touches withEvent:(UIEvent*)event { // Retrieve the touch point UITouch *touch=[[event allTouches]anyObject]; CGPoint point= [touch locationInView:touch.view]; ...
Handling UITouches for different parts of a game open gl ES iphone
A simplified example here: I have a game that I am writing in opengl es. The game has two different screens that do completely different things based on the user's touch input. What is the best way to abstract out the uitouch events from the view? I imagine that in a perfect world the touch events would be handled by my game loop, bu...
UIControlEventTouch...?
I have a grid of images/buttons, and I want the user to be able to drag their finger over the images/buttons such that when their finger touches each image/button an event is called. How do I do this??? The best example I can think of now is the Contacts app, how you drag your finger down the list of letters (on the right) and as you t...
[iphone] How to build a "virtual zippo" app?
Hey guys, You probably all know the famous virtual zippo app. I thought of making such an app too, just for learning objective-c. THe developer said he has used a video of flame. How is it possible to play a video inside a UIView? DO you have any ideas of how to achieving that? Thanks in advance! ...
How to send a touch event to iPhone OS?
Im writing an app running in background on a jailbreak iphone. I need to send touch event to iPhone OS to simulate finger touches. Is this possible? ...
How to tell if a subview was tapped twice
I have a UIImageView that I allocated inside of a UIView. I want to double tap that subview using the TOUCHESENDED or TOUCHESBEGAN and send a callback or at least a log. I would appreciate anyone who can upload some code. ...
Is there a way to retrieve every responder that has handled a UITouch?
I'm trying to debug some touchesBegan/Moved/Ended related slowdown in my game; I think that some of my touch responders are not unloading properly, and so as the game runs on more and more of them stack up and the touches get less responsive because they have to pass through a larger and larger responder chain. Is there some way to vi...
How to detect a two finger flick
I want to switch between a couple views with a flick gesture using two fingers. If anyone can tell me what I need to do please help. ...
Creating a UITouch object
In my iPhone app I'm overriding the touchesBegan:withEvent method in my view and what I want to do is make some tweaks to the UITouch object found in the NSSet and send it to another view. I couldn't find anywhere how to create a UITouch object. Any ideas? thanks, fbr ...
How do I access only one of my touches in my touches began event
I have: UITouch *touch = [touches anyObject]; if ([touches count] == 2) { //preforming actions } What I want to do Is ask it inside of the ifstatement where the two touches are seperatly. ...