事件处理 – 如何在cocos2d中的模态层下停止所有CCTouch？

在我的cocos2d游戏中,我有一个“设置”按钮,它启动一个模态层,用于锁定其下的所有内容.为此,我使用菜单状态方法的组合锁定所有CCMenuItems并使用覆盖层;两者都在代码中.

问题是这两种解决方案似乎都不适用于CCScrollLayers.当我单击按钮(启动模态)时,仍然可以滚动CCScrollLayer,这不是我想要的.

我想：

>按下禁用按钮ALL触摸并禁用包括CCScrollLayers在内的所有元素
>启动模态(仅允许触摸模态)

我试过了：

>使用Touch使用CCTargetedTouchDelegate吞下所有触摸

[[CCTouchDispatcher sharedDispatcher] addTargetedDelegate：self priority：0 swallowsTouches：YES];

>我试过了

self.isTouchEnabled =启动模态的图层上的NO

>我已经尝试调整MenuStatus方法,以便它适用于CCScrollLayers但它似乎不起作用.

我不确定我做错了什么.我的代码如下.

// My main layer which launches the Settings Modal Layer

#pragma mark - Lock/Unlock layers

-(void) doSettings
{    
    [self lockLayers];
    SettingsModalLayer *sml = [[[SettingsModalLayer alloc] init] autorelease];
    [sml showSettingsOnLayer:self closeBlock:^{[self unlockLayers];}];
}

-(void) lockLayers
{
    [[CCTouchDispatcher sharedDispatcher] addTargetedDelegate:self priority:0 swallowsTouches:YES];
    [self MenuStatus:NO Node:self];   
}

-(void) unlockLayers
{
    [self MenuStatus:YES Node:self];
}


// Disabled/Enable layers
-(void) MenuStatus:(BOOL)_enable Node:(id)_node
{
    for (id result in ((CCNode *)_node).children) {        


        if ([result isKindOfClass:[CCMenu class]]) {
            for (id result1 in ((CCMenu *)result).children) {
                if ([result1 isKindOfClass:[CCMenuItem class]]) {
                    ((CCMenuItem *)result1).isEnabled = _enable;
                }
            } // next
        } 

    } // next

}


-(void) registerWithTouchDispatcher {
    [[CCTouchDispatcher sharedDispatcher] addTargetedDelegate:self priority:INT_MIN+1 swallowsTouches:YES];
}

- (void)ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    NSLog(@"Event: %@",event);
    for( UITouch *touch in touches )
    {
        CGPoint location = [touch locationInView: [touch view]];

        location = [[CCDirector sharedDirector] convertToGL: location];        
        CCLayer *gl = (CCLayer *)[self getChildByTag:4];
        [gl setIsTouchEnabled:NO];

    }
}
-(void) ccTouchCancelled:(UITouch *)touch withEvent:(UIEvent *)event
{

}


-(void) ccTouchEnded:(UITouch *)touch withEvent:(UIEvent *)event
{
    [self removeFromParentAndCleanup:YES];    
}

-(BOOL) ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event
{

    return YES;
}



// Settings Modal Layer

-(void) showSettingsOnLayer:(CCLayer *)layer closeBlock:(void (^)())noBlock 
{
    CoverLayer *coverLayer = [[CoverLayer alloc] init];
    [layer addChild:coverLayer z:1000];
    [coverLayer runAction:[CCFadeTo actionWithDuration:kAnimationTime opacity:155]]; // smooth fade-in to dim with semi-transparency

... // Other stuff goes here

}


    // CoverLayer
    // This is meant to stop all touches,but it doesn't really work on CCScrollLayer

#define kDialogTag 1234
#import "CoverLayer.h"



// class that implements a black colored layer that will cover the whole screen 
// and eats all touches except within the dialog box child

@implementation CoverLayer
- (id)init {
    self = [super init];
    if (self) {
        [self initWithColor:ccc4(0,0) 
                      width:[CCDirector sharedDirector].winSize.width 
                     height:[CCDirector sharedDirector].winSize.height];
        self.isTouchEnabled = YES;
    }
    return self;
}

- (void)dealloc {
    [[CCTouchDispatcher sharedDispatcher] removeDelegate:self];
    [super dealloc];
}


- (BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event 
{
    CGPoint touchLocation = [self convertTouchToNodeSpace: touch];
    CCNode *dialogBox = [self getChildByTag: kDialogTag];

    // eat all touches outside of dialog box
    return !CGRectContainsPoint(dialogBox.boundingBox,touchLocation);
}

解决方法

您只需要了解优先级如何与CCTouchDispatcher一起使用.
具有最小优先级值的层将首先接收触摸事件.现在您只需要相应地调整优先级.

在使用CCTouchDispatcher注册并覆盖ccTouchBegan时,创建一个阻塞层类并将其优先级设置为最小值,并在其中返回YES.

如果您查看CCMenu类,您会注意到默认优先级是kCCMenuTouchPriority = -128,这就是菜单项具有更高触摸优先级的原因.