Question

我遇到了一些cocos2d代码的问题，它在模拟器上运行正常（在这种情况下意味着当我触摸和滚动时精灵正在移动）但是它在我的ipod上不起作用 ccTouchesMoved在两者上都被调用，但精灵仅在模拟器中移动

CCSprite *gradA = [CCSprite spriteWithFile:@"grad.png"];
gradA.anchorPoint = ccp(0, 0);
gradA.position = ccp(0, 0);

[...]

-(void) ccTouchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{   
    //NSLog(@"ccTouchesMoved called");

    UITouch *touch   = [touches anyObject];
    CGPoint location = [touch locationInView: [touch view]];
    location = [[CCDirector sharedDirector] convertToGL:location];

    int d = (_prevTouch.y - location.y);
    // This code should make the sprite moving
    // And it does on the simulator but not on my ipod
    gradA.position = ccp(PARALAX_X, gradA.position.y - d);

    _prevTouch = location;
}

-(void) ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    UITouch *touch   = [touches anyObject];
    CGPoint location = [touch locationInView: [touch view]];
    location = [[CCDirector sharedDirector] convertToGL:location];

    _firstTouch = location;
}

-(void) ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{   
    UITouch *touch   = [touches anyObject];
    CGPoint location = [touch locationInView: [touch view]];
    location = [[CCDirector sharedDirector] convertToGL:location];

    _lastTouch = location;
}

BTW如果我做“gradA.position = ccp（0，gradA.position.y - d）;” 在除了ccTouchesMoved以外的任何其他方法中，它可以在设备和模拟器上运行。

这可能是一个愚蠢的错误（我希望是这样），因为这是我的第一个项目。

Answer 1

这是我现在如何移动我的精灵（在ccTouchesMoved中）：

    UITouch *touch = [touches anyObject];

    CGPoint touchLocation = [self convertTouchToNodeSpace:touch];

    CGPoint oldTouchLocation = [touch previousLocationInView:touch.view];
    oldTouchLocation = [[CCDirector sharedDirector] convertToGL:oldTouchLocation];
    oldTouchLocation = [self convertToNodeSpace:oldTouchLocation];

    CGPoint translation = ccpSub(touchLocation, oldTouchLocation);

    CGPoint newPos = ccpAdd(currentFragment.position, translation);
    currentFragment.position = newPos;

Answer 2

答案很简单，如果设备和模拟器之间有问题，你应该检查一下（以及文件名大小写） NSLog在设备上非常慢，因此它会阻止设备渲染精灵移动。

我在ccTouchesMoved方法的代码中有两个NSLog，当我删除它时，它就像一个魅力。

避免在设备上使用NSLog。

Cocos2d iphone：更改CCSprite.position可以在模拟器上运行，但不能在设备上运行

2 个答案: