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.
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've a view with 10 character labels (big letters). Each character (label) has a different tag. The functionality that I'm developing is "Trace".
When user moves his finger over the view, i want to detect which character is touched.
I think I've to implement,
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
But I'm not knowing how to identify touch on the label and identify the character.
Can some one help me?
If you want to know the view that the touch began on (which view the user put their finger down on), you can read any of the touch items returned in the NSSet like so:
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
NSInteger viewTag = [[[touches anyObject] view] tag];
//Check your view using the tags you've set...
}
However, even as the finger moves across the screen, this view property will ONLY return the view initially touched and not the view currently under the finger. To do this, you will need to track the coordinates of the current touch and determine which view it falls into, perhaps like this:
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [touches anyObject];
CGPoint point = [touch locationInView:self.view];
//If all your views are collected as an array
for(UIView *view in views) {
if (CGRectContainsPoint([view frame], point))
{
//Bingo
}
}
}
The key to success on this is to make sure that you are getting your touches in coordinates reference to the proper views, so make sure to call locationInView: and CGRectContainsPoint() appropriately with values that match your application's view hierarchy and where your placing this code (i.e. the View, ViewController, etc.)
To detect simple touches you can use UIGestureRecognizer. Read the documentation for more on those. For more complex operations you do need to implement:
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
To identify which item was touched you can give your item's tags values:
myView.tag = 4;
Then just check the tag value of the view reporting the touch and you know which it is.
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
I am using touchesBegan:.
I touch an object and drag-and-drop it to some other place, but I also want to make a copy of it on its original. That is, after touching and dragging, there should be a copy of it at its original position.
Below is my code:
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch=[[event allTouches]anyObject];
CGPoint location=[touch locationInView:touch.view];
image1.center=location;
}
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
[self touchesBegan:touches withEvent:event];
}
Instead of moving image1 create and image2 (in touchesBegan) and move it (in touchesMoved)
You have to get touches from the superview of the object you want to move I believe.
You didn't show what image1 is, hence nobody can tell certainly how to copy that.
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
}