I am developing some games using multi touch for iPhone (cocos). Could anyone teach me how to start, from very scratch beginning. I am not sure where to start or any resources that can help. I really appreciate the helps.
#implementation GameScene
- (id)init
{
if (self = [super init])
{
Sprite *background = [Sprite spriteWithFile:#"unzip.png"];
background.position = CGPointMake(240,160);
[self addChild:background];
Label *aboutContent = [Label labelWithString:#"Welcome to the game" fontName:#"Helvetica" fontSize:30];
aboutContent.position = CGPointMake(240,160);
[self addChild:aboutContent];
}
return self;
}
#end
I have this code. This import the image . The just want the players can touch 2 points A and B in the centre and move them in the opposite sides far from each other. Could anyone give me some examples.?
Monocle Studios has a whitepaper: introduction to cocos2d iphone.
Pretty good place to start from.
Touches can be detected by any Layer by settings isTouchEnabled property to YES.
Any other CocosNode class descendant can implement the protocol TargetedTouchDelegate and StandardTouchDelegate and then register itself with the touch dispatcher:
[[TouchDispatcher sharedDispatcher] addTargetedDelegate:self
priority: 0 swallowsTouches:YES];
You must then implement:
- (BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event
- (void)ccTouchMoved:(UITouch *)touch withEvent:(UIEvent *)event
- (void)ccTouchEnded:(UITouch *)touch withEvent:(UIEvent *)event
in that object.
Hope that helps.
Related
self.isTouchEnabled = YES;
in init method ofcourse.
-(void) ccTouchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [touches anyObject];
CGPoint location = [touch locationInView:[touch view]];
location = [[CCDirector sharedDirector] convertToGL:location];
}
-(void) ccTouchMoved:(UITouch *)touch withEvent:(UIEvent *)event
{
CGPoint location = [touch locationInView:[touch view]];
location = [[CCDirector sharedDirector] convertToGL:location];
}
in Above code ccTouchesMoved works fine but ccTouchMoved doesn't call..
any help ?!
Cocos2d supports two different ways of handling touch events. These are defined by two different types of delegates (both defined in CCTouchDelegateProtocol.h).
Standard Touch Delegate:
#optional
- (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;
These are the same sorts of events you'd get in a standard CocoaTouch app. You'll get all events, and all touches; it will be up to you to sort out which touches you care about in a multi-touch environment.To get these events in a CCLayer subclass, you simply set isTouchEnabled = YES, like so:
self.isTouchEnabled = YES;
Targeted Touch Delegate
- (BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event;
#optional
- (void)ccTouchMoved:(UITouch *)touch withEvent:(UIEvent *)event;
- (void)ccTouchEnded:(UITouch *)touch withEvent:(UIEvent *)event;
- (void)ccTouchCancelled:(UITouch *)touch withEvent:(UIEvent *)event;
Note two important differences between the targeted and the standard touch delegate:
These methods provide only a single touch, rather than a set of them – and for that reason, the method names start with “ccTouch” rather than “ccTouches”.
The ccTouchBegan method is required and returns a boolean value.
So ccTouchBegan will be invoked separately for each of the available touches, and you return YES to indicate a touch you care about. Only touches claimed by ccTouchBegan will be subsequently passed on to the Moved, Ended, and Cancelled events (all of which are optional).
To receive these events, you must register as a targeted touch delegate with the global dispatcher. In a CCLayer subclass, override registerWithTouchDispatcher as follows:
-(void) registerWithTouchDispatcher {
[[CCTouchDispatcher sharedDispatcher] addTargetedDelegate:self priority:0 swallowsTouches:YES];
}
(which will mean importing “CCTouchDispatcher.h” at the top of your file).
Which to use?
Apart from the more complex registration, the targeted touch delegate is generally easier to use, since you don't have to split the NSSet up yourself, and you don't have to keep checking whether the event is the one you want in the Moved/Ended/Cancelled events. But if you want to deal with multiple touches in one method (for example, because you combine them into a zoom or rotate input), you'll probably want to use the standard touch delegate instead.
Note that you can only use one or the other.
There's 2 behaviours: one for standard touches, one for multiple touches. You don't have to addTargetedDelegate:::, you can simply set the touchMode property to the value you like. The CCLayer will take care of the registration for you.
- (void)onEnter
{
[self setTouchMode: kCCTouchesAllAtOnce]; //resp kCCTouchesOneByOne
}
Behind the scenes, changing the touchMode will disable then re-enable the touches, and enabling the touches (enableTouch) will register the proper delegate for you, by calling either addStandardDelegate or addTargetedDelegate.
I'm trying to start developing cocos2d games. So, I'm new in cocos2d, but I developed few applications on iPhone. I installed cocos templates (v2.0) and created new project with box2d phisics. Here I can see a demo project with blocks and some menus. When I tap screen, new block appears, and falls to the botton of screen. Than must be implemented here:
- (void)ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
//Add a new body/atlas sprite at the touched location
for( UITouch *touch in touches ) {
CGPoint location = [touch locationInView: [touch view]];
location = [[CCDirector sharedDirector] convertToGL: location];
[self addNewSpriteAtPosition: location];
}
}
so, sprite appears when touches ended. But how to do something when touches begun or moved? I cant this finds methods for cocos. I saw some tutorials, there is method like this:
- (BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event {
return YES;
}
but it never called... What am I doung wrong?
Implement
(BOOL)ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
And ensure you have
self.isTouchEnabled = YES;.
in your init method for that layer.
Implement:
- (BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event {
// whatever is needed here
return YES;
}
in your cocos2d class (the same implementing ccTouchesEnded), then it will be called.
I will describe the problem, I have sprites that are all letters of the alphabet, and I wonder how I can do that when you touch the letters form a word and I can generate a string that word and through it to compare with a string that have a plist. I need any idea that might help me, thank you.
Yes, this is possible. One way to test for touches is by using the CCTouchDispatcher.
Overview
Determine which class will monitor for touches of your letter sprites.
Make the class a delegate of CCTargetedTouchDelegate.
Add code to the class to register with the CCTouchDispatcher.
Add code to the class to unregister with the CCTouchDispatcher.
Add the touch callback methods to your class. In the touch callback methods, you must add code for determining which sprite was touched.
Register and unregister from Dispatcher
[[CCTouchDispatcher sharedDispatcher] addTargetedDelegate:self priority:0 swallowsTouches:YES];
[[CCTouchDispatcher sharedDispatcher] removeDelegate:self];
CallBack Methods To Implement
- (BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event
- (void)ccTouchMoved:(UITouch *)touch withEvent:(UIEvent *)event
- (void)ccTouchEnded:(UITouch *)touch withEvent:(UIEvent *)event
Example Code For Testing If Touch In Sprite
- (BOOL) isTouch:(UITouch *)touch InSprite:(CCSprite *)sprite
{
CGPoint touchLocation = [touch locationInView: [touch view]];
touchLocation = [[CCDirector sharedDirector] convertToGL: touchLocation];
CGPoint localLocation = [sprite convertToNodeSpace:touchLocation];
CGRect spriteRect = [sprite textureRect];
spriteRect.origin = CGPointZero;
if(CGRectContainsPoint(spriteRect, localLocation))
{
return YES;
}
return NO;
}
Maybe it will be more simple to use CCMenuItem (it can also be created from sprite) because it's already touchable. Everything you have to do is to specify a function will be called, when CCMenuItem is touched.
Take a look at the official programming guide:
http://www.cocos2d-iphone.org/wiki/doku.php/prog_guide:lesson_3._menus_and_scenes
Please can someone help sort a noob out? I've posted this problem on various forums and received no answers, while many searches for other answers have turned up stackOverflow, so I'm hoping this is the place.
I've got a BeachView.h (subclass of UIScrollView, picture of a sandy beach) covered with a random number of Stone.h (subclass of UIImageView, a random PNG of a stone, userInteractionEnabled = YES to accept touches).
If the user touches and moves on the beach, it should scroll.
If the user taps a stone, it should call method "touchedStone".
If the user taps the beach where there is no stone, it should call method "touchedBeach".
Now, I realize this sounds dead simple. Everyone and everything tells me that if there's something on a UIScrollView that accepts touches that it should pass control on to it. So when I touch and drag, it should scroll; but if I tap, and it's on a stone, it should ignore beach taps and accept stone taps, yes?
However, it seems that both views are accepting the tap and calling both touchedStone AND touchedBeach. Furthermore, the beach tap occurs first, so I can't even put in a "if touchedStone then don't run touchedBeach" type flag.
Here's some code.
On BeachView.m
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
if (self.decelerating) { didScroll = YES; }
else { didScroll = NO; }
UITouch *touch = [[event allTouches] anyObject];
CGPoint touchLocation = [touch locationInView:touch.view];
NSLog(#"touched beach = %#", [touch view]);
lastTouch = touchLocation;
[super touchesBegan:touches withEvent:event];
}
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
didScroll = YES;
[super touchesMoved:touches withEvent:event];
}
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
if (didScroll == NO && isPaused == NO) {
[self touchedBeach:YES location:lastTouch];
}
[super touchesEnded:touches withEvent:event];
}
On Stone.m
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
[parent stoneWasTouched]; // parent = ivar pointing from stone to beachview
}
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [[event allTouches] anyObject];
CGPoint touchLocation = [touch locationInView:touch.view];
NSLog(#"touched stone = %#", [touch view]);
[parent touchedStone:YES location:touchLocation];
}
After a stone tap, My NSLog looks like this:
Touched beach = <BeachView: 0x1276a0>
ran touchedBeach
Touched Stone = <Stone: 0x1480c0>
ran touchedStone
So it's actually running both. What's even stranger is if I take the touchesBegan and touchesEnded out of Stone.m but leave userInteractionEnabled = YES, the beachView registers both touches itself, but returns the Stone as the view it touched (the second time).
Touched beach = <BeachView: 0x1276a0>
ran touchedBeach
Touched beach = <Stone: 0x1480c0>
ran touchedBeach
So PLEASE, I've been trying to sort this for days. How do I make it so a tapped stone calls only touchedStone and a tapped beach calls only touchedBeach? Where am I going wrong?
Is true, iPhone SDK 3.0 and up, don't pass touches to -touchesBegan: and -touchesEnded: **UIScrollview**subclass methods anymore. You can use the touchesShouldBegin and touchesShouldCancelInContentView methods that is not the same.
If you really want to get this touches, have one hack that allow this.
In your subclass of UIScrollView override the hitTest method like this:
- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event {
UIView *result = nil;
for (UIView *child in self.subviews)
if ([child pointInside:point withEvent:event])
if ((result = [child hitTest:point withEvent:event]) != nil)
break;
return result;
}
This will pass to you subclass this touches, however you can't cancel the touches to UIScrollView super class.
Prior to iPhone OS 3.0, the UIScrollView's hitTest:withEvent: method always returns self so that it receives the UIEvent directly, only forwarding it to the appropriate subview if and when it determines it's not related to scrolling or zooming.
I couldn't really comment on iPhone OS 3.0 as it's under NDA, but check your "iPhone SDK Release notes for iPhone OS 3.0 beta 5" :)
If you need to target pre-3.0, you could override hitTest:withEvent: in BeachView and set a flag to ignore the next beach touch if the CGPoint is actually in a stone.
But have you tried simply moving your calls to [super touches*:withEvent:] from the end of your overridden methods to the start? This might cause the stone tap to occur first.
I had a similar problem with a simpleView and it is added to a scrollView , and whenever I touched the simpleView , the scrollView used to get the touch and instead of the simpleView , the scrollView moved . To avoid this , I disabled the srcolling of the scrollView when the user touched the simpleView and otherwise the scrolling is enabled .
- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event {
UIView *result = [super hitTest:point withEvent:event] ;
if (result == simpleView)
{
scrollView.scrollEnabled = NO ;
}
else
{
scrollView.scrollEnabled = YES ;
}
return result ;
}
This could be related to a bug in iOS7 please review my issue (bug report submitted)
UIScrollView subclass has changed behavior in iOS7
I just don't get it.
I use cocos2d for development of a small game on the iPhone/Pod. The framework is just great, but I fail at touch detection. I read that you just need to overwrite the proper functions (e.g. "touchesBegan" ) in the implementation of a class which subclasses CocosNode. But it doesn't work. What could I do wrong?
the function:
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{NSLog(#"tickle, hihi!");}
did I get it totally wrong?
Layer is the only cocos2d class which gets touches.
The trick is that ALL instances of Layer get passed the touch events, one after the other, so your code has to handle this.
I did it like this:
-(BOOL)ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
CGPoint location = [touch locationInView: [touch view]];
CGPoint cLoc = [[Director sharedDirector] convertCoordinate: location];
float labelX = self.position.x - HALF_WIDTH;
float labelY = self.position.y - HALF_WIDTH;
float labelXWidth = labelX + WIDTH;
float labelYHeight = labelY + WIDTH;
if( labelX < cLoc.x &&
labelY < cLoc.y &&
labelXWidth > cLoc.x &&
labelYHeight > cLoc.y){
NSLog(#"WE ARE TOUCHED AND I AM A %#", self.labelString);
return kEventHandled;
} else {
return kEventIgnored;
}
}
Note that the cocos2d library has a "ccTouchesEnded" implementation, rather than the Apple standard. It allows you to return a BOOL indicating whether or not you handled the event.
Good luck!
Have you added this to your layers init method?
// isTouchEnabled is an property of Layer (the super class).
// When it is YES, then the touches will be enabled
self.isTouchEnabled = YES;
// isAccelerometerEnabled is property of Layer (the super class).
// When it is YES, then the accelerometer will be enabled
self.isAccelerometerEnabled = YES;
In order to detect touches, you need to subclass from UIResponder (which UIView does as well) . I am not familiar with cocos2D, but a quick look at the documentation reveals that CocosNode does not derive from UIResponder.
Upon further investigation, it looks like Cocos folks created a Layer class that derives from CocosNode. And that class implements the touch event handlers. But those are prefixed by cc.
See http://code.google.com/p/cocos2d-iphone/source/browse/trunk/cocos2d/Layer.h
Also see menu.m code and the below blog post article for more info on this:
http://blog.sapusmedia.com/2008/12/cocos2d-propagating-touch-events.html
maw, the CGPoint struct members x,y are floats. use #"%f" to format floats for printf/NSLog.
If you use the 0.9 beta of cocos2D it has a really simple touch detection for CocosNodes. The real beauty of this new detection is that it handles multiple touch tracking really well.
An example of this can be found here
http://code.google.com/p/cocos2d-iphone/source/browse/#svn/trunk/tests/TouchesTest
- (void)ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
//Add a new body/atlas sprite at the touched location
CGPoint tapPosition;
for( UITouch *touch in touches ) {
CGPoint location = [touch locationInView: [touch view]];
tapPosition = [self convertToNodeSpace:[[CCDirector sharedDirector] convertToGL:location]]; // get the tapped position
}
}
think this can help you....
-Make your scene conforms to protocol CCTargetedTouchDelegate
-Add This line to init of your scene:
[[[CCDirector sharedDirector] touchDispatcher] addTargetedDelegate:self priority:0 swallowsTouches:NO];
-Implement these functions:
- (BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event
{
return YES;
}
-(void)ccTouchEnded:(UITouch *)touch withEvent:(UIEvent *)event
{
//here touch is ended
}