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问题描述

我想知道如何在多点触摸视图中检测和区分触摸。我已经阅读了一个哈希代码,但我不明白如何使用它。我想知道我的两个精灵在同一时间被触摸,就像在钢琴的两个琴键上按下和弦一样。

I would like to know how to detect and differentiate between touches in a multi-touch view. I have read about a "hash" code, but I don't understand how to use it. I want to know when two of my Sprites are touched at the same time, like as if pressing a chord on two keys of a piano.


下面是我为ccTouchesBegan所做的例子:

Here is an example of what I have for my ccTouchesBegan:

- (void) ccTouchesBegan:(NSSet*)touches withEvent:(UIEvent*)event {

  NSSet *allTouches = [event allTouches];
  int validTouchCount = 0;
  for (UITouch* touch in allTouches) {

    BOOL touchIsValid = FALSE;

    CGPoint location = [touch locationInView: [touch view]];
    CGPoint convertedLocation = [[CCDirector sharedDirector] convertToGL:location];

    if (CGRectContainsPoint(_fourButtonsRect, convertedLocation)) {
        NSLog(@"Touch is within four buttons");
        touchIsValid = TRUE;
    }


    _playerDidAction = 0;
    NSLog(@"before the loop");
    if (touchIsValid) {

        validTouchCount++;
        NSLog(@"Within ValidTouches loop");
        CGPoint validLocation = [touch locationInView: [touch view]];
        CGPoint convertedValidLocation = [[CCDirector sharedDirector] convertToGL:validLocation];

        if (CGRectContainsPoint(_redButtonSprite.boundingBox, convertedValidLocation)) {
            _redButtonStatus = TRUE;
            [_redButtonSprite setTexture:_redButtonLit];
            if (validTouchCount == 1) {
                _playerDidAction = 1;
            }
        }
            else if (CGRectContainsPoint(_blueButtonSprite.boundingBox, convertedValidLocation)) {
                _blueButtonStatus = TRUE;
                [_blueButtonSprite setTexture:_blueButtonLit];
                if (validTouchCount == 1) {
                    _playerDidAction = 2;
                }
            }
                else if (CGRectContainsPoint(_greenButtonSprite.boundingBox, convertedValidLocation)) {
                    _greenButtonStatus = TRUE;
                    [_greenButtonSprite setTexture:_greenButtonLit];
                    if (validTouchCount == 1) {
                        _playerDidAction = 3;
                    }
                }
                    else if (CGRectContainsPoint(_yellowButtonSprite.boundingBox, convertedValidLocation)) {
                        _yellowButtonStatus = TRUE;
                        [_yellowButtonSprite setTexture:_yellowButtonLit];
                        if (validTouchCount == 1) {
                            _playerDidAction = 4;
                        }
                    }

        if (validTouchCount > 1) {

            if (_redButtonStatus && _blueButtonStatus) {
                _comboRB = TRUE;
                _playerDidAction = 5;
            }
                else if (_redButtonStatus && _greenButtonStatus) {
                    _comboRG = TRUE;
                    _playerDidAction = 6;
                }
                    else if (_redButtonStatus && _yellowButtonStatus) {
                        _comboRY = TRUE;
                        _playerDidAction = 7;
                    }
                        else if (_blueButtonStatus && _greenButtonStatus) {
                            _comboBG = TRUE;
                            _playerDidAction = 8;
                        }
                            else if (_blueButtonStatus && _yellowButtonStatus) {
                                _comboBY = TRUE;
                                _playerDidAction = 9;
                            }
                                else if (_greenButtonStatus && _yellowButtonStatus) {
                                    _comboGY = TRUE;
                                    _playerDidAction = 10;
                                }

        }
    }
  }
}

这里是我的ccTouchesEnded的开始:

And here is the beginning of my ccTouchesEnded:

- (void)ccTouchesEnded:(NSSet*)touches withEvent:(UIEvent*)event {

    for (UITouch *touch in touches) {


        CGPoint location = [touch locationInView: [touch view]];
        CGPoint convertedLocation = [[CCDirector sharedDirector] convertToGL:location];
        if (CGRectContainsPoint(_redButtonSprite.boundingBox, convertedLocation)) {
            _redButtonStatus = FALSE;
            [_redButtonSprite setTexture:_redButtonNormal];
        }
        if (CGRectContainsPoint(_blueButtonSprite.boundingBox, convertedLocation)) {
            _blueButtonStatus = FALSE;
            [_blueButtonSprite setTexture:_blueButtonNormal];
        }
        if (CGRectContainsPoint(_greenButtonSprite.boundingBox, convertedLocation)) {
            _greenButtonStatus = FALSE;
            [_greenButtonSprite setTexture:_greenButtonNormal];
        }
        if (CGRectContainsPoint(_yellowButtonSprite.boundingBox, convertedLocation)) {
            _yellowButtonStatus = FALSE;
            [_yellowButtonSprite setTexture:_yellowButtonNormal];
        }


    }
}

你能给我一个例子,如何捕获从sprite开始,结束在sprite上的触摸?我一直在努力,不能让哈希码工作 - 只是不明白如何哈希码可以用来引用一个触摸以后。我猜我想要做什么将被称为哈希跟踪器?

Could you maybe give me an example of how you would capture touches that began on a sprite and ended on a sprite? I have been struggling and can't get the hash code to work - just not understanding how the hash code can be used to reference a touch later. I guess what I'm trying to make would be called a hash tracker?

我相信有一个更少的复杂的方式来做它使用哈希码和更少状态变量。我没有充分利用ccTouchesEnded方法与其他状态变量效果,因为我希望找到一个更简单的方法(我知道我仍然需要使ccTouchesMoved和Cancelled方法)。

I am sure there is a much less convoluted way to do it using the hash codes and less state variables. I haven't fleshed out the ccTouchesEnded method with the other state variable effects because I was hoping to find a simpler way (I know I still need to make the ccTouchesMoved and Canceled methods too).

推荐答案

这里是我实现这一点,如果其他人试图这样做(我限制为2按钮组合,但我可以很容易地将逻辑扩展到3& ; 4按钮组合)。我选择使用ccTouchBegan / Ended / Moved单独处理每个触摸,而不是使用ccTouchesBegan / Ended / Moved,因为我根本无法使用哈希码。欢迎任何其他想法。

Here is how I implemented this in case anyone else is trying to do this (I have limited it to 2-button combos but I could easily extend the logic to 3 & 4-button combos as well). I chose to handle each touch individually using the ccTouchBegan/Ended/Moved instead of using the ccTouchesBegan/Ended/Moved because I just couldn't get it to work with the hash code. Any alternative ideas would be welcome.

spuButton.h(CCSprite子类)

spuButton.h (a CCSprite Subclass)

#import <Foundation/Foundation.h>
#import "cocos2d.h"

typedef enum tagButtonState {
    kButtonStatePressed,
    kButtonStateNotPressed
} ButtonState;

typedef enum tagButtonStatus {
    kButtonStatusEnabled,
    kButtonStatusDisabled
} ButtonStatus;

@interface spuButton : CCSprite <CCTargetedTouchDelegate> {
@private
    ButtonState buttonState;
    CCTexture2D *buttonNormal;
    CCTexture2D *buttonLit;
    ButtonStatus buttonStatus;
}

@property(nonatomic, readonly) CGRect rect;

+ (id)spuButtonWithTexture:(CCTexture2D *)normalTexture;

- (void)setNormalTexture:(CCTexture2D *)normalTexture;
- (void)setLitTexture:(CCTexture2D *)litTexture;
- (BOOL)isPressed;
- (BOOL)isNotPressed;
- (void)makeDisabled;
- (void)makeEnabled;
- (BOOL)isEnabled;
- (BOOL)isDisabled;
- (void)makeLit;
- (void)makeNormal;
- (void)dealloc;

@end

spuButton.m

spuButton.m

#import "spuButton.h"
#import "cocos2d.h"

@implementation spuButton

- (CGRect)rect {
    CGSize s = [self.texture contentSize];
    return CGRectMake(-s.width / 2, -s.height / 2, s.width, s.height);
}

+ (id)spuButtonWithTexture:(CCTexture2D *)normalTexture {
    return [[[self alloc] initWithTexture:normalTexture] autorelease];
}

- (void)setNormalTexture:(CCTexture2D *)normalTexture {
    buttonNormal = normalTexture;
}
- (void)setLitTexture:(CCTexture2D *)litTexture {
    buttonLit = litTexture;
}

- (BOOL)isPressed {
    if (buttonState== kButtonStateNotPressed) return NO;
    if (buttonState== kButtonStatePressed) return YES;
    return NO;
}

- (BOOL)isNotPressed {
    if (buttonState== kButtonStateNotPressed) return YES;
    if (buttonState== kButtonStatePressed) return NO;
    return YES;
}

- (void)makeDisabled {
    buttonStatus = kButtonStatusDisabled;
    buttonState= kButtonStateNotPressed;
    [self makeNormal];
}
- (void)makeEnabled {
    buttonStatus = kButtonStatusEnabled;
    buttonState= kButtonStateNotPressed;
    [self makeNormal];
}

- (BOOL)isEnabled {
    if (buttonStatus== kButtonStatusDisabled) return NO;
    if (buttonStatus== kButtonStatusEnabled) return YES;
    return NO;
}

- (BOOL)isDisabled {
    if (buttonStatus== kButtonStatusEnabled) return NO;
    if (buttonStatus== kButtonStatusDisabled) return YES;
    return YES;
}

- (void)makeLit {
    [self setTexture:buttonLit];
}

- (void)makeNormal {
    [self setTexture:buttonNormal];
}

- (id)initWithTexture:(CCTexture2D *)aTexture {
    if ((self = [super initWithTexture:aTexture]) ) {
        buttonState = kButtonStateNotPressed;
        buttonStatus = kButtonStatusEnabled;
    }
    return self;
}

- (void)onEnter {
    if (buttonStatus == kButtonStatusDisabled) return;
    [[CCTouchDispatcher sharedDispatcher] addTargetedDelegate:self priority:0 swallowsTouches:NO];
    [super onEnter];
}

- (void)onExit {
    if (buttonStatus == kButtonStatusDisabled) return;
    [[CCTouchDispatcher sharedDispatcher] removeDelegate:self];
    [super onExit];
}

- (BOOL)containsTouchLocation:(UITouch *)touch {
    return CGRectContainsPoint(self.rect, [self convertTouchToNodeSpaceAR:touch]);
}

- (BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event {
    if (buttonStatus == kButtonStatusDisabled) return NO;
    if (buttonState== kButtonStatePressed) return NO;
    if ( ![self containsTouchLocation:touch] ) return NO;

    buttonState= kButtonStatePressed;
    [self makeLit];

    return YES;
}

- (void)ccTouchMoved:(UITouch *)touch withEvent:(UIEvent *)event {
    // If it weren't for the TouchDispatcher, you would need to keep a reference
    // to the touch from touchBegan and check that the current touch is the same
    // as that one.
    // Actually, it would be even more complicated since in the Cocos dispatcher
    // you get NSSets instead of 1 UITouch, so you'd need to loop through the set
    // in each touchXXX method.

    if (buttonStatus == kButtonStatusDisabled) return;
    if ([self containsTouchLocation:touch]) return;

    buttonState= kButtonStateNotPressed;
    [self makeNormal];
}

- (void)ccTouchEnded:(UITouch *)touch withEvent:(UIEvent *)event {
    if (buttonStatus == kButtonStatusDisabled) return;

    buttonState= kButtonStateNotPressed;
    [self makeNormal];
}

- (void)dealloc {
    [buttonNormal release];
    [buttonLit release];
    [super dealloc];
}

@end

HelloWorldScene.m tick:方法来保持我的其他函数不混淆的例子)

HelloWorldScene.m (Just my tick: method to keep my other functions from confusing the example)

-(void)tick:(ccTime)dt {
    if ([[_otherControlsArray objectAtIndex:0] wasPressed]) {
        [[_otherControlsArray objectAtIndex:0] setWasPressed:NO];
        [self removeChild:[_otherControlsArray objectAtIndex:0] cleanup:YES];
        [self addChild:[_otherControlsArray objectAtIndex:1]];
        NSLog(@"Play");

        _gameHasNotBeenPlayedYet = NO;
        Snarfle_s_PowerUPAppDelegate *delegate = [[UIApplication sharedApplication] delegate];
        [delegate makeNotPaused];
        [self gameLogic];
    }

    if (_gameHasNotBeenPlayedYet) {
        return;
    }

    if (_buttonsPressedAndReleased > 0) {  //respond to button(s) released and reset
        NSLog(@"Buttons Pressed and Released-->%d",_buttonsPressedAndReleased);
        if ([self checkButtons:_buttonsPressedAndReleased]);
        _buttonsPressed = 0;
        _buttonsPressedAndReleased = 0;

        return;
    }
    if (_buttonsPressed <= 4) { // two buttons have not already been pressed
        for (spuButton *aButton in _fourButtonsArray) {
            if ([aButton isNotPressed]) continue; //this button is not pressed
            if (_buttonsPressed == 0) { //this button is pressed and no other buttons have been pressed
                _buttonsPressed = aButton.tag;
                continue;
            }
            //this button is pressed while another has been pressed
            //figure out which two buttons have been pressed
            if (_buttonsPressed == 1) {  //red plus another
                switch (aButton.tag) {
                    case 2:   //blue
                        _buttonsPressed = 5;
                        [[_fourButtonsArray objectAtIndex:2] makeDisabled];
                        [[_fourButtonsArray objectAtIndex:3] makeDisabled];
                        break;
                    case 3:  //green
                        _buttonsPressed = 6;
                        [[_fourButtonsArray objectAtIndex:1] makeDisabled];
                        [[_fourButtonsArray objectAtIndex:3] makeDisabled];
                        break;
                    case 4:  //yellow
                        _buttonsPressed = 7;
                        [[_fourButtonsArray objectAtIndex:1] makeDisabled];
                        [[_fourButtonsArray objectAtIndex:2] makeDisabled];
                        break;
                    default:
                        _buttonsPressed = 1;
                        break;
                }
            }
            if (_buttonsPressed == 2) {  //blue plus another
                switch (aButton.tag) {
                    case 1:   //red
                        _buttonsPressed = 5;
                        [[_fourButtonsArray objectAtIndex:2] makeDisabled];
                        [[_fourButtonsArray objectAtIndex:3] makeDisabled];
                        break;
                    case 3:  //green
                        _buttonsPressed = 8;
                        [[_fourButtonsArray objectAtIndex:0] makeDisabled];
                        [[_fourButtonsArray objectAtIndex:3] makeDisabled];
                        break;
                    case 4:  //yellow
                        _buttonsPressed = 9;
                        [[_fourButtonsArray objectAtIndex:0] makeDisabled];
                        [[_fourButtonsArray objectAtIndex:2] makeDisabled];
                        break;
                    default:
                        _buttonsPressed = 2;
                        break;
                }
            }
            if (_buttonsPressed == 3) {  //green plus another
                switch (aButton.tag) {
                    case 1:   //red
                        _buttonsPressed = 6;
                        [[_fourButtonsArray objectAtIndex:1] makeDisabled];
                        [[_fourButtonsArray objectAtIndex:3] makeDisabled];
                        break;
                    case 2:  //blue
                        _buttonsPressed = 8;
                        [[_fourButtonsArray objectAtIndex:0] makeDisabled];
                        [[_fourButtonsArray objectAtIndex:3] makeDisabled];
                        break;
                    case 4:  //yellow
                        _buttonsPressed = 10;
                        [[_fourButtonsArray objectAtIndex:0] makeDisabled];
                        [[_fourButtonsArray objectAtIndex:1] makeDisabled];
                        break;
                    default:
                        _buttonsPressed = 3;
                        break;
                }
            }
            if (_buttonsPressed == 4) {  //yellow plus another
                switch (aButton.tag) {
                    case 1:   //red
                        _buttonsPressed = 7;
                        [[_fourButtonsArray objectAtIndex:1] makeDisabled];
                        [[_fourButtonsArray objectAtIndex:2] makeDisabled];
                        break;
                    case 2:  //blue
                        _buttonsPressed = 9;
                        [[_fourButtonsArray objectAtIndex:0] makeDisabled];
                        [[_fourButtonsArray objectAtIndex:2] makeDisabled];
                        break;
                    case 3:  //green
                        _buttonsPressed = 10;
                        [[_fourButtonsArray objectAtIndex:0] makeDisabled];
                        [[_fourButtonsArray objectAtIndex:1] makeDisabled];
                        break;
                    default:
                        _buttonsPressed = 4;
                        break;
                }
            }
            if (_buttonsPressed > 4) break;  //more than one has been pressed and identified
        }
    }
    //now we know what buttons have been pressed now check to see if they have been released
    //if more than one has been pressed disable the other two
    //also if more than one has been pressed and one of them gets released disable the released one but keep it lit
    switch (_buttonsPressed) {
        case 1:  //red
            if ([[_fourButtonsArray objectAtIndex:0] isNotPressed]) _buttonsPressedAndReleased = 1;
            break;
        case 2:  //blue
            if ([[_fourButtonsArray objectAtIndex:1] isNotPressed]) _buttonsPressedAndReleased = 2;
            break;
        case 3:  //green
            if ([[_fourButtonsArray objectAtIndex:2] isNotPressed]) _buttonsPressedAndReleased = 3;
            break;
        case 4:  //yellow
            if ([[_fourButtonsArray objectAtIndex:3] isNotPressed]) _buttonsPressedAndReleased = 4;
            break;
        case 5:  //red & blue
            if (([[_fourButtonsArray objectAtIndex:0] isNotPressed]) && ([[_fourButtonsArray objectAtIndex:1] isNotPressed])) _buttonsPressedAndReleased = 5;
            else {
                if ([[_fourButtonsArray objectAtIndex:0] isNotPressed]) {
                    [[_fourButtonsArray objectAtIndex:0] makeDisabled];
                    [[_fourButtonsArray objectAtIndex:0] makeLit];
                }
                if ([[_fourButtonsArray objectAtIndex:1] isNotPressed]) {
                    [[_fourButtonsArray objectAtIndex:1] makeDisabled];
                    [[_fourButtonsArray objectAtIndex:1] makeLit];
                }
            }
            break;
        case 6:  //red & green
            if (([[_fourButtonsArray objectAtIndex:0] isNotPressed]) && ([[_fourButtonsArray objectAtIndex:2] isNotPressed])) _buttonsPressedAndReleased = 6;
            else {
                if ([[_fourButtonsArray objectAtIndex:0] isNotPressed]) {
                    [[_fourButtonsArray objectAtIndex:0] makeDisabled];
                    [[_fourButtonsArray objectAtIndex:0] makeLit];
                }
                if ([[_fourButtonsArray objectAtIndex:2] isNotPressed]) {
                    [[_fourButtonsArray objectAtIndex:2] makeDisabled];
                    [[_fourButtonsArray objectAtIndex:2] makeLit];
                }
            }
            break;
        case 7:  //red & yellow
            if (([[_fourButtonsArray objectAtIndex:0] isNotPressed]) && ([[_fourButtonsArray objectAtIndex:3] isNotPressed])) _buttonsPressedAndReleased = 7;
            else {
                if ([[_fourButtonsArray objectAtIndex:0] isNotPressed]) {
                    [[_fourButtonsArray objectAtIndex:0] makeDisabled];
                    [[_fourButtonsArray objectAtIndex:0] makeLit];
                }
                if ([[_fourButtonsArray objectAtIndex:3] isNotPressed]) {
                    [[_fourButtonsArray objectAtIndex:3] makeDisabled];
                    [[_fourButtonsArray objectAtIndex:3] makeLit];
                }
            }
            break;
        case 8:  //blue & green
            if (([[_fourButtonsArray objectAtIndex:1] isNotPressed]) && ([[_fourButtonsArray objectAtIndex:2] isNotPressed])) _buttonsPressedAndReleased = 8;
            else {
                if ([[_fourButtonsArray objectAtIndex:1] isNotPressed]) {
                    [[_fourButtonsArray objectAtIndex:1] makeDisabled];
                    [[_fourButtonsArray objectAtIndex:1] makeLit];
                }
                if ([[_fourButtonsArray objectAtIndex:2] isNotPressed]) {
                    [[_fourButtonsArray objectAtIndex:2] makeDisabled];
                    [[_fourButtonsArray objectAtIndex:2] makeLit];
                }
            }
            break;
        case 9:  //blue & yellow
            if (([[_fourButtonsArray objectAtIndex:1] isNotPressed]) && ([[_fourButtonsArray objectAtIndex:3] isNotPressed])) _buttonsPressedAndReleased = 9;
            else {
                if ([[_fourButtonsArray objectAtIndex:1] isNotPressed]) {
                    [[_fourButtonsArray objectAtIndex:1] makeDisabled];
                    [[_fourButtonsArray objectAtIndex:1] makeLit];
                }
                if ([[_fourButtonsArray objectAtIndex:3] isNotPressed]) {
                    [[_fourButtonsArray objectAtIndex:3] makeDisabled];
                    [[_fourButtonsArray objectAtIndex:3] makeLit];
                }
            }
            break;
        case 10:  //green & yellow
            if (([[_fourButtonsArray objectAtIndex:2] isNotPressed]) && ([[_fourButtonsArray objectAtIndex:3] isNotPressed])) _buttonsPressedAndReleased = 10;
            else {
                if ([[_fourButtonsArray objectAtIndex:2] isNotPressed]) {
                    [[_fourButtonsArray objectAtIndex:2] makeDisabled];
                    [[_fourButtonsArray objectAtIndex:2] makeLit];
                }
                if ([[_fourButtonsArray objectAtIndex:3] isNotPressed]) {
                    [[_fourButtonsArray objectAtIndex:3] makeDisabled];
                    [[_fourButtonsArray objectAtIndex:3] makeLit];
                }
            }
            break;
        default:
            _buttonsPressedAndReleased = 0;
            break;
    }
}

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07-29 21:48