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iOS Multitouch touchesBegan

nickculbertson

nickculbertson

macrumors regular
Original poster
Nov 19, 2010
226
0
Nashville, TN
I've had a great deal of trouble getting multitouch to work properly in touchesBegan. I've found plenty of tuts online but none have worked for me so far. I'm trying to make a guitar type app. I can get touchesMoved to fire properly but touching down on the notes only recognizes the first touch. What have I missed?

Code: 
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
	//NSSet *touchy = [touches setByAddingObjectsFromSet:[event allTouches]];
	//NSLog(@"Adding %d touches.", [[touchy allObjects] count]);
	//NSUInteger *touch = [[touches anyObject] tapCount];
	////for (UITouch *touch in touches){
	//Touch *touch = [touches anyObject];
	//[self setMultipleTouchEnabled:YES];
	//NSSet *touches = [[event allTouches] anyObject];
	//NSMutableSet *currentTouches = [[[event touchesForView:self]mutableCopy] autorelease];
	//[currentTouches minusSet:touches];
	
	//int nb = [touch count];
	
UITouch *touch = [[event allTouches] anyObject];
	
	CGPoint location1 = [touch locationInView:touch.view];
	CGPoint location1b = [touch locationInView:touch.view];
	CGPoint location1c = [touch locationInView:touch.view];
	CGPoint location1d = [touch locationInView:touch.view];
		
	//if ([touches count] == 1) 
	//for (UITouch *touch in touches){
	//if ([currentTouches count] >0) {
		
	NSLog(@"1");
	
    if(CGRectContainsPoint(pianoButton1.frame, location1)) 
    {	if (label1.text == @"0")
		{[pianoButton1 setHighlighted:YES];
		NSString *path = [[NSBundle mainBundle] pathForResource:@"uku G" ofType:@"wav"];
		AVAudioPlayer * myMusic11=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
			self.myMusic = myMusic11;
			myMusic.delegate = self; 
			[myMusic play];}
	else if (label1.text == @"1"){[pianoButton1 setHighlighted:YES];
		NSString *path = [[NSBundle mainBundle] pathForResource:@"uku G#" ofType:@"wav"];
		AVAudioPlayer * myMusic11=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
		self.myMusic = myMusic11;
		myMusic.delegate = self; 
		[myMusic play];}
		if (label1.text == @"2")
		{[pianoButton1 setHighlighted:YES];
			NSString *path = [[NSBundle mainBundle] pathForResource:@"uku A" ofType:@"wav"];
			AVAudioPlayer * myMusic11=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
			self.myMusic = myMusic11;
			myMusic.delegate = self; 
			[myMusic play];}
		else if (label1.text == @"3"){[pianoButton1 setHighlighted:YES];
			NSString *path = [[NSBundle mainBundle] pathForResource:@"uku A#" ofType:@"wav"];
			AVAudioPlayer * myMusic11=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
			self.myMusic = myMusic11;
			myMusic.delegate = self; 
			[myMusic play];}
		if (label1.text == @"4")
		{[pianoButton1 setHighlighted:YES];
			NSString *path = [[NSBundle mainBundle] pathForResource:@"uku B" ofType:@"wav"];
			AVAudioPlayer * myMusic11=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
			self.myMusic = myMusic11;
			myMusic.delegate = self; 
			[myMusic play];}
		else if (label1.text == @"5"){[pianoButton1 setHighlighted:YES];
			NSString *path = [[NSBundle mainBundle] pathForResource:@"uku 2C" ofType:@"wav"];
			AVAudioPlayer * myMusic11=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
			self.myMusic = myMusic11;
			myMusic.delegate = self; 
			[myMusic play];}
	}else {
        [pianoButton1 setHighlighted:NO];
    }
    if(CGRectContainsPoint(pianoButton2.frame, location1b)) 
    {	if (label2.text == @"0")
		{[pianoButton2 setHighlighted:YES];
		NSString *path = [[NSBundle mainBundle] pathForResource:@"uku C" ofType:@"wav"];
		AVAudioPlayer * myMusic22=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
		self.myMusic2 = myMusic22;
			myMusic2.delegate = self; 
			[myMusic2 play];
		}
		if (label2.text == @"1")
		{[pianoButton2 setHighlighted:YES];
			NSString *path = [[NSBundle mainBundle] pathForResource:@"uku C#" ofType:@"wav"];
			AVAudioPlayer * myMusic22=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
			self.myMusic2 = myMusic22;
			myMusic2.delegate = self; 
			[myMusic2 play];
		}
		if (label2.text == @"2")
		{[pianoButton2 setHighlighted:YES];
			NSString *path = [[NSBundle mainBundle] pathForResource:@"uku D" ofType:@"wav"];
			AVAudioPlayer * myMusic22=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
			self.myMusic2 = myMusic22;
			myMusic2.delegate = self; 
			[myMusic2 play];
		}
		if (label2.text == @"3")
		{[pianoButton2 setHighlighted:YES];
			NSString *path = [[NSBundle mainBundle] pathForResource:@"uku D#" ofType:@"wav"];
			AVAudioPlayer * myMusic22=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
			self.myMusic2 = myMusic22;
			myMusic2.delegate = self; 
			[myMusic2 play];
		}
		if (label2.text == @"4")
		{[pianoButton2 setHighlighted:YES];
			NSString *path = [[NSBundle mainBundle] pathForResource:@"uku E" ofType:@"wav"];
			AVAudioPlayer * myMusic22=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
			self.myMusic2 = myMusic22;
			myMusic2.delegate = self;
			[myMusic2 play];
		}
		if (label2.text == @"5")
		{[pianoButton2 setHighlighted:YES];
			NSString *path = [[NSBundle mainBundle] pathForResource:@"uku F" ofType:@"wav"];
			AVAudioPlayer * myMusic22=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
			self.myMusic2 = myMusic22;
			myMusic2.delegate = self; 
			[myMusic2 play];
		}
	}else {
        [pianoButton2 setHighlighted:NO];
    }
    if(CGRectContainsPoint(pianoButton3.frame, location1c))
    {   if (label3.text == @"0")
	{[pianoButton3 setHighlighted:YES];
		NSString *path = [[NSBundle mainBundle] pathForResource:@"uku E" ofType:@"wav"];
		AVAudioPlayer * myMusic33=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
		self.myMusic3 = myMusic33;
		myMusic3.delegate = self; 
		[myMusic3 play];}
	else if (label3.text == @"1"){[pianoButton3 setHighlighted:YES];
		NSString *path = [[NSBundle mainBundle] pathForResource:@"uku F" ofType:@"wav"];
		AVAudioPlayer * myMusic33=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
		self.myMusic3 = myMusic33;
		myMusic3.delegate = self; 
		[myMusic3 play];}
		if (label3.text == @"2")
		{[pianoButton3 setHighlighted:YES];
			NSString *path = [[NSBundle mainBundle] pathForResource:@"uku F#" ofType:@"wav"];
			AVAudioPlayer * myMusic33=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
			self.myMusic3 = myMusic33;
			myMusic3.delegate = self; 
			[myMusic3 play];}
		else if (label3.text == @"3"){[pianoButton3 setHighlighted:YES];
			NSString *path = [[NSBundle mainBundle] pathForResource:@"uku G" ofType:@"wav"];
			AVAudioPlayer * myMusic33=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
			self.myMusic3 = myMusic33;
			myMusic3.delegate = self; 
			[myMusic3 play];}
		if (label3.text == @"4")
		{[pianoButton3 setHighlighted:YES];
			NSString *path = [[NSBundle mainBundle] pathForResource:@"uku G#" ofType:@"wav"];
			
			AVAudioPlayer * myMusic33=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
			self.myMusic3 = myMusic33;
			myMusic3.delegate = self; 
			[myMusic3 play];}
		else if (label3.text == @"5"){[pianoButton3 setHighlighted:YES];
			NSString *path = [[NSBundle mainBundle] pathForResource:@"uku A" ofType:@"wav"];
			AVAudioPlayer * myMusic33=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
			self.myMusic3 = myMusic33;
			myMusic3.delegate = self; 
			[myMusic3 play];}
	}else {
        [pianoButton3 setHighlighted:NO];
    }
	if(CGRectContainsPoint(pianoButton4.frame, location1d))
    {   if (label4.text == @"0")
	{[pianoButton4 setHighlighted:YES];
		NSString *path = [[NSBundle mainBundle] pathForResource:@"uku A" ofType:@"wav"];
		AVAudioPlayer * myMusic44=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
		self.myMusic4 = myMusic44;
		myMusic4.delegate = self; 
		[myMusic4 play];}
	else if (label4.text == @"1"){[pianoButton4 setHighlighted:YES];
		NSString *path = [[NSBundle mainBundle] pathForResource:@"uku A#" ofType:@"wav"];
		AVAudioPlayer * myMusic44=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
		self.myMusic4 = myMusic44;
		myMusic4.delegate = self;
		[myMusic4 play];}
		if (label4.text == @"2")
		{[pianoButton4 setHighlighted:YES];
			NSString *path = [[NSBundle mainBundle] pathForResource:@"uku B" ofType:@"wav"];
			AVAudioPlayer * myMusic44=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
			self.myMusic4 = myMusic44;
			myMusic4.delegate = self;
			[myMusic4 play];}
		else if (label4.text == @"3"){[pianoButton4 setHighlighted:YES];
			NSString *path = [[NSBundle mainBundle] pathForResource:@"uku 2C" ofType:@"wav"];
			AVAudioPlayer * myMusic44=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
			self.myMusic4 = myMusic44;
			myMusic4.delegate = self;
			[myMusic4 play];}
		if (label4.text == @"4")
		{[pianoButton4 setHighlighted:YES];
			NSString *path = [[NSBundle mainBundle] pathForResource:@"uku 2C#" ofType:@"wav"];
			AVAudioPlayer * myMusic44=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
			self.myMusic4 = myMusic44;
			myMusic4.delegate = self;
			[myMusic4 play];}
		else if (label4.text == @"5"){[pianoButton4 setHighlighted:YES];
			NSString *path = [[NSBundle mainBundle] pathForResource:@"uku 2D" ofType:@"wav"];
			AVAudioPlayer * myMusic44=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
			self.myMusic4 = myMusic44;
			myMusic4.delegate = self;
			[myMusic4 play];}
	}else {
        [pianoButton4 setHighlighted:NO];
    }
}

Thanks,
Nick
 
From iphonedevsdk:

...in touchesBegan, 'touches' will always contain one object, unless more than one touch happened to register instantaneously (not likely).
Click to expand...

P.S. Your conditional-logic section seems to contain a lot of replicated code. You might want to consider consolidating / refactoring in a way that, at least, lends itself to being easier to understand and maintain.
 
dejo said:
From iphonedevsdk:



P.S. Your conditional-logic section seems to contain a lot of replicated code. You might want to consider consolidating / refactoring in a way that, at least, lends itself to being easier to understand and maintain.
Click to expand...

Thanks for the reply. I'll definitely refine the conditional statements once I get my other touches working properly. I've seen that post on iphonedevsdk and tried the codes they suggested but with no luck. oh well, search continues.

Nick
 
PhoneyDeveloper said:
Have you set multipleTouchEnabled?

Aren't UIGestureRecognizers supposed to make this simpler?
Click to expand...

In my viewDidLoad I have
Code: 
        [pianoButton1b setMultipleTouchEnabled:YES];
	[pianoButton1 setMultipleTouchEnabled: YES ];
	[pianoButton2 setMultipleTouchEnabled: YES ];
	[pianoButton3 setMultipleTouchEnabled: YES ];
	[pianoButton4 setMultipleTouchEnabled: YES ];
pianoButton1b is the Background and the others are the "strings." Each one is a UIImageView. I'm thinking I must assign an integer for each touch.

Thanks,
Nick
 
I'm still having a little trouble with multi-touch. With "ActiveTouches", I can satisfy my need for multiple touches to fire different actions in touchesBegan. I believe that the View is still only registering 1 touch. Each new touch replaces the first touch. This would be fine, except in touchesMoved if I have 2 fingers on the screen the "touch" ping-pongs causing the 2 actions to fire alternately at a rapid pace. What am I missing to make this a successful multitouch code?

Code: 
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
	
	if (ActiveTouches == nil)
        ActiveTouches = [[NSMutableArray alloc] init];
	for (UITouch *touch in touches) {{
        if (![ActiveTouches containsObject:touch])
            [ActiveTouches addObject:touch];
    }
	CGPoint location1 = [touch locationInView:touch.view];


    if(CGRectContainsPoint(pianoButton1.frame, location1)) 
    {  if(!pianoButton1.isHighlighted){
		if (label1.text == @"0")
		{[pianoButton1 setHighlighted:YES];
			NSString *path = [[NSBundle mainBundle] pathForResource:@"ukuG" ofType:@"wav"];
			if(myMusic)myMusic.volume -= .99;
			AVAudioPlayer * myMusic11=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
			self.myMusic = myMusic11;
			myMusic.delegate = self;
			[myMusic play];}
		else if (label1.text == @"1"){[pianoButton1 setHighlighted:YES];
			NSString *path = [[NSBundle mainBundle] pathForResource:@"ukuG#" ofType:@"wav"];
			if(myMusic)myMusic.volume -= .99;
			AVAudioPlayer * myMusic11=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
			self.myMusic = myMusic11;
			myMusic.delegate = self;
			[myMusic play];}
		else if (label1.text == @"2")
		{[pianoButton1 setHighlighted:YES];
			NSString *path = [[NSBundle mainBundle] pathForResource:@"ukuA" ofType:@"wav"];
			if(myMusic)myMusic.volume -= .99;
			AVAudioPlayer * myMusic11=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
			self.myMusic = myMusic11;
			myMusic.delegate = self;
			[myMusic play];}
		else if (label1.text == @"3"){[pianoButton1 setHighlighted:YES];
			NSString *path = [[NSBundle mainBundle] pathForResource:@"ukuA#" ofType:@"wav"];
			if(myMusic)myMusic.volume -= .99;
			AVAudioPlayer * myMusic11=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
			
			self.myMusic = myMusic11;
			myMusic.delegate = self;
			[myMusic play];}
		else if (label1.text == @"4")
		{[pianoButton1 setHighlighted:YES];
			NSString *path = [[NSBundle mainBundle] pathForResource:@"ukuB" ofType:@"wav"];
			if(myMusic)myMusic.volume -= .99;
			AVAudioPlayer * myMusic11=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
			self.myMusic = myMusic11;
			myMusic.delegate = self;
			[myMusic play];}
		else if (label1.text == @"5"){[pianoButton1 setHighlighted:YES];
			NSString *path = [[NSBundle mainBundle] pathForResource:@"uku2C" ofType:@"wav"];
			if(myMusic)myMusic.volume -= .99;
			AVAudioPlayer * myMusic11=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
			self.myMusic = myMusic11;
			myMusic.delegate = self;
			[myMusic play];}}
	}else {
        [pianoButton1 setHighlighted:NO];
    }
}

Thanks,
Nick
 
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