我的应用程序中出现NSInvalidArgumentException错误...任何擅长这方面的人请帮帮我

Question

我正尝试在我的游戏中添加不同的关卡。在玩游戏的时候，分数会上升到一定的分数，然后水平会发生变化。这是我的计划，但是我用if代码写了一个类似于'spiderupdate:(cctime)delta‘的代码，如你所见。我很确定这就是问题所在，当我不把'if‘放在那里，并且只使用一个级别的时候，它就不会崩溃了。有人能帮我弄清楚怎么修吗？

错误类似于'NSInvalidArgumentException'，原因是：'-Play texture:无法识别的选择器发送到实例0xf57da10‘

Play是我的类名，texture应该是method，但我没有任何名为texture的方法。

-(void) spidersUpdate:(ccTime)delta {
// Try to find a spider which isn't currently moving. 
for (int i = 0; i < 10; i++)
{
    int randomSpiderIndex = CCRANDOM_0_1() * [spiders count]; 
    CCSprite* spider = [spiders objectAtIndex:randomSpiderIndex];
    // If the spider isn't moving it won’t have any running actions.
    if ([spider numberOfRunningActions] == 0)
    {   
        if(currentScore<=30)
            [self level1:spider];
        else if(31<=currentScore<=60)
            [self level2:spider];
        else if (61<=currentScore<=90) {
            [self level3:spider];
        }
        else if (91<=currentScore<=120) {
            [self level4:spider];
        }
        else if (120<=currentScore) {
            [self level5:spider];
        }
        break;
        // Only one spider should start moving at a time.
        }

} 
}

-(void) level1:(CCSprite*)spider {
// Slowly increase the spider speed over time. 
numSpidersMoved++;
if (numSpidersMoved % 8 == 0 && spiderMoveDuration > 2.0f) {
    spiderMoveDuration -= 0.2f; }
CGPoint belowScreenPosition = CGPointMake(spider.position.x,
                                          -10);
CCMoveTo* move = [CCMoveTo actionWithDuration:spiderMoveDuration

                                     position:belowScreenPosition]; 
CCCallFuncN* callDidDrop =[CCCallFuncN actionWithTarget:self selector:@selector(spiderDidDrop:)];
CCSequence* sequence = [CCSequence actions:move, callDidDrop, nil];
if ([spider runAction:sequence])
{
    currentScore++;
}

}

-(void) level2:(CCSprite*)spider
{
numSpidersMoved++;
if (numSpidersMoved % 8 == 0 && spiderMoveDuration > 2.0f) {
    spiderMoveDuration -= 0.2f; }

// Slowly increase the spider speed over time. 
CGPoint belowScreenPosition = CGPointMake(spider.position.x,
                                          -10);
CCMoveTo* move = [CCMoveTo actionWithDuration:spiderMoveDuration position:belowScreenPosition];
CCActionEase*esay=[CCEaseExponentialIn actionWithAction:move];
CCCallFuncN* callDidDrop =[CCCallFuncN actionWithTarget:self selector:@selector(spiderDidDrop:)];
CCSequence* sequence = [CCSequence actions:esay, callDidDrop, nil];
if ([spider runAction:sequence])
{
    currentScore++;
}
}
-(void) level3:(CCSprite*)spider
{
numSpidersMoved++;
if (numSpidersMoved % 8 == 0 && spiderMoveDuration > 2.0f) {
    spiderMoveDuration -= 0.2f; }

// Slowly increase the spider speed over time. 
CGPoint belowScreenPosition = CGPointMake(spider.position.x,
                                          -10);
CCMoveTo* move = [CCMoveTo actionWithDuration:spiderMoveDuration position:belowScreenPosition];
CCActionEase*esay=[CCEaseExponentialInOut actionWithAction:move];
CCCallFuncN* callDidDrop =[CCCallFuncN actionWithTarget:self selector:@selector(spiderDidDrop:)];
CCSequence* sequence = [CCSequence actions:esay, callDidDrop, nil];
if ([spider runAction:sequence])
{
    currentScore++;
    }
}

-(void) level4:(CCSprite*)spider
{
numSpidersMoved++;
if (numSpidersMoved % 8 == 0 && spiderMoveDuration > 2.0f) {
    spiderMoveDuration -= 0.2f; }

// Slowly increase the spider speed over time. 
CGPoint belowScreenPosition = CGPointMake(spider.position.x,
                                          -10);
CCMoveTo* move = [CCMoveTo actionWithDuration:spiderMoveDuration position:belowScreenPosition];
CCActionEase*esay=[CCEaseExponentialOut actionWithAction:move];
CCCallFuncN* callDidDrop =[CCCallFuncN actionWithTarget:self selector:@selector(spiderDidDrop:)];
CCSequence* sequence = [CCSequence actions:esay, callDidDrop, nil];
if ([spider runAction:sequence])
{
    currentScore++;
}
}
-(void) level5:(CCSprite *)spider
{   numSpidersMoved++;
ccTime delayTime=2.5f;
if (numSpidersMoved %8 == 0 && delayTime>1.0f)
{
    delayTime-=0.2f;
}
CGPoint dropALittleBit= CGPointMake(spider.position.x, 350);
CGPoint belowScreenPosition= CGPointMake(spider.position.x, -10);
CCMoveTo*move =[CCMoveTo actionWithDuration:0.8 position:dropALittleBit];
CCDelayTime*delay=[CCDelayTime actionWithDuration:delayTime];
CCMoveTo*drop=[CCMoveTo actionWithDuration:0.3f position:belowScreenPosition];
CCCallFuncN*callDidDrop=[CCCallFuncN actionWithTarget:self selector:@selector(spiderDidDrop:)];
   if ([spider runAction:[CCSequence actions:move,delay,drop,callDidDrop, nil]])
{
   currentScore++;
}
}
-(void) spiderDidDrop:(id)sender {
// Make sure sender is actually of the right class.
NSAssert([sender isKindOfClass:[CCSprite class]], @"sender is not a CCSprite!"); 
CCSprite* spider = (CCSprite*)sender;
// move the spider back up outside the top of the screen
CGPoint pos = spider.position;
CGSize screenSize = [[CCDirector sharedDirector] winSize];
pos.y = screenSize.height + [spider texture].contentSize.height; 
spider.position = pos;
}

Answer 1

这里有一个链接http://www.cocos2d-iphone.org/api-ref/0.99.0/interface_c_c_sprite.html，它告诉CCCsprite的属性，你可以看到没有属性作为纹理，所以如果你想的话，可以检查并使用textureRect属性。

希望能有所帮助