I am quite familiar with cocos2D (been working with it for over 1 year) and I encountered a problem with my multitouch game - the multitouch.
What I have:
[glView setMultipleTouchEnabled:YES] in my delegate.
A playscene that does NOT implement touches.
Many objects (of my own, inherits CCLayer) that are added to playscene.
These objects implement touches and are delegates of the targeted protocol.
[CCTouchDispatcher sharedDispatcher] addTargetedDelegate:self priority:0 swallowsTouches:YES];
The very same architecture is used in the touches test from cocos2D and it's working.
The only difference is that they use CCSprite instead of CCLayer as the parent class for the objects.
Does anyone have any ideas?
I do it this way:
in app delegate:
[glView setMultipleTouchEnabled:YES]
then in you game you see the touches like this:
self.isTouchEnabled = YES;
- (void)ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {}
- (void)ccTouchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {}
- (void)ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {}
- (void)ccTouchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event {}
With this I sold my problem I hope it helps
Well, you will never guess! Of course I knew XCode is not the best IDE in the world and that sometimes you should clean the project and rebuild...but I never thought to do a new project and import everything in there. That was the problem!!! How f**ked up...I thought I only had to code... After that , everything worked ok.
Related
on the current project I am working on, on one of the views, I have a UIView and on top of it UIScrollView which is constructed from the interface builder.
I have implemented the following UIResponder instance methods:
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
but the control comes to this methods only when touch event occur in area where is not covered by the UIScrollView.
how I can get the hold of a touch event on the UIScrollView also?
you could create a subclass of UIScrollView and override:
- (BOOL)touchesShouldBegin:(NSSet *)touches withEvent:(UIEvent *)event inContentView:(UIView *)view
you have to be careful that you don't interfere with the scrolling gestures etc tho.
I am working on a semi-piano app with a diffrent keyboard-layout then a usual one.
I created the view manually with UIButtons,
My problem was I that I didn't know how to slide from a UIButton to another,
I figured that out with addTarget with the option of withEvent, which gave me the access to the touches.
Now, after I added the target like this:
[C addTarget:self action:#selector(outsideOfKey: forEvent:) forControlEvents:UIControlEventTouchDragOutside|UIControlEventTouchDragInside];
[C addTarget:self action:#selector(keyGetsLeft: forEvent:) forControlEvents:UIControlEventTouchUpOutside | UIControlEventTouchUpInside];
(also for all of the other keys),
I maneged to make them slideable,
outsideOfKey:forEvent: is as follows:
-(void) outsideOfKey:(id)sender forEvent:(UIEvent *)event
{
for(UITouch *t in [event allTouches])
{
CGPoint touchPoint = [t locationInView:window];
if(CGRectContainsPoint(C.frame, touchPoint))
{
C.highlighted = YES;
}
else{
C.highlighted = NO;
}
(Done for all the other keys as well)
I can slide from and into other keys, and when I leave them in keyGetsLeft:forEvent: I have just used the same syntx without the else, and the highlighted became NO.
Up to here it's easy,
But then when I try to do multi-touch, I can slide only one of the touches all around and the others must stay in the same position.
And even more, If I take one of the fingers away all of them are becoming non-highlighted,
I know the reasons to all of that, but I don't know how to fix it and make it to work.
I would probably move away from UIButtons altogether and implement my own custom touch tracking code. See Handling Multitouch Events in the docs. Namely, you will be implementing the following methods:
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
I would probably just implement hit areas, which you could setup in IB, with perhaps a custom UIView touch overlay (just a UIView with a custom subclass). This would let you setup the view in IB with images, titles, etc., but do all of your touch tracking in your custom subclass.
I am afraid, bensnider is right. But I'd implement it via GestureRecognizer:
https://developer.apple.com/documentation/uikit/touches_presses_and_gestures/handling_uikit_gestures
https://developer.apple.com/documentation/uikit/uigesturerecognizer
Each key has one TapRecognizer, while a parent view has a SwipeRecognizer to detect slides form one key to another.
Very useful, on Apple Developer Video Archivelogin with development account required:
WWDC2010: Session 120 — Simplifying Touch Event Handling with Gesture Recognizers
WWDC2010: Session 121 — Advanced Gesture Recognition
I'd use one view for all buttons and manually implement touch tracking as bensnider said. Manually drawing backgrounds/titles also is not so difficult.
Heres a link to an open source iOS piano app I made https://github.com/meech-ward/iOSPiano
I used CALayers for the piano keys and I used
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event;
to detect if the user is currently touching a piano key.
It works really well even with multiple touches.
I'm currently working on a music player app, and like the iPod application, I would like to shuffle songs with shake gesture.
I'm implementing motion methods like Apple recommends to, and in foreground everything works fine.
- (void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event;
- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event;
- (void)motionCancelled:(UIEventSubtype)motion withEvent:(UIEvent *)event;
But I just can't figure out how to call those methods from background. I've looked all over the internet, and there's not threads about this.
first things first: is it possible?
Thanx!
It's not possible now, whether you use iOS 4 or any lower SDK version.
I am developing a simple game photo puzzle. I have 9 pieces of an image. The image parts are placed on different UIView. Now I want to know how can I move the uiview parts on a touch ?
Thanks...
check this
you need to handle
- (void) touchesBegan:(NSSet*)touches withEvent:(UIEvent*)event {}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {}
events
I dont know if anyone of you guys know the Spin the Bottle application for the iphone. I want to make a simple app which offers the user a simple image with a bottle. The user should be able to rotate the bottle by using finger gestures. He/She should be able to rotate it with a rotation with the fingers and after releasing (touchesEnd) the bottle should spin further and slow down until it stop at a position based on the speed.
any clues or hints for a solution?
While it's better if you understand everything yourself, if you want a more concrete example the code here works
Narut's post which is like the 5th response has nice clean code for what you want.
In order to respond to a custom multi-touch gesture such as a rotation, you'll need to subclass either the image view or the view containing it and build a custom implementation of the following methods:
- (void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event;
- (void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event;
- (void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event;
- (void) touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event;
Essentially, think of the iPhone screen as a graph, and fingers as points. You use the above methods in a view to figure out how/where fingers are on the graph.
Good starting points:
http://developer.apple.com/IPhone/library/documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/EventHandling/EventHandling.html
https://stackoverflow.com/questions/tagged/multi-touch+iphone