Question

我正在为iOS7开发一款Spritekit游戏，我想让一系列硬币从上到下从屏幕上掉下来。我熟悉这样一个事实，即拥有一系列项目，通常首选数组，但我不熟悉数组。为了使硬币不断下降，这就是我设置的：

-(void)testCoins {

    testCoin = [SKSpriteNode spriteNodeWithTexture:[SKTexture textureWithImageNamed:@"catCoin.png"] size:CGSizeMake(26.05, 25.5)];
    testCoin.physicsBody = [SKPhysicsBody bodyWithCircleOfRadius:12];
    testCoin.physicsBody.affectedByGravity = NO;
    testCoin.physicsBody.categoryBitMask = CollisionDebris;
    testCoin.name = @"coin";

    RandomPosition = arc4random() %260*DoubleIfIpad;
    RandomPosition = RandomPosition + 20*DoubleIfIpad;
    testCoin.position = CGPointMake (RandomPosition, self.size.height + 40*DoubleIfIpad);

    [self addChild:testCoin];

    SKAction *moveDown = [SKAction moveByX:0 y:-self.size.height+100 duration:10.0];

    [testCoin runAction:moveDown];

    [self runAction:[SKAction sequence:@[
            [SKAction waitForDuration:2.0],
            [SKAction performSelector:@selector(testCoins) onTarget:self],
    ]]];

    if (testCoin.position.y < CGRectGetMinY(self.frame)) {
        [testCoin removeFromParent];
    }
}

一切正常，硬币正确生成并正确地沿着屏幕流下来。问题实际上在于联系人，因为我用于联系的if语句告诉程序删除硬币，然后添加一个点。这样做，但它总是在屏幕上保留一个硬币并且不会将其移除，但是如果玩家继续点击可见硬币，它将添加点，并从屏幕上移除其他硬币。我认为这是因为我正在使用performSelector调用来继续重复该方法，因此它会在屏幕上保留一枚硬币。虽然我错了，但我完全糊涂了。

有更好的方法吗？也许额外的方法额外的硬币???

如果有人做了类似的事情，请你指导我正确的方向，无论是添加阵列等。

提前致谢，如果需要任何额外信息，请告知我们。

Answer 1

它简单的sprite工具包为我们提供了一种独特的方法来搜索节点我的名字“enumerateChildNodesWithName”

请查看下面的示例，我认为它适用于您，而您不需要数组

#import "milkhuntMyScene.h"

@implementation milkhuntMyScene
{
    int balloonId;
    int aniId;
    int removeId;
}
-(id)initWithSize:(CGSize)size {    
    if (self = [super initWithSize:size]) {
        /* Setup your scene here */
        [self FallBalloons:20];
    }
    return self;
}
-(void)FallBalloons:(int)total
{
    for(int i=0;i<total;i++)
    {
        balloonId+=1;
        SKSpriteNode *balloon=[SKSpriteNode spriteNodeWithImageNamed:@"balloon1.png"];
        [self addChild:balloon];
        balloon.position=CGPointMake(50+(i*balloon.size.width), 700);
        balloon.name=[NSString stringWithFormat:@"Balloon%d", balloonId];
    }
    SKAction *aniTime= [SKAction sequence:@[
                                                [SKAction waitForDuration:0.2],
                                                [SKAction performSelector:@selector(aniBalloon)
                                                                 onTarget:self]

                                                ]];
    [self runAction:[SKAction repeatAction:aniTime count:total]];
}
-(void)aniBalloon
{
            aniId+=1;
    [self enumerateChildNodesWithName:[NSString stringWithFormat:@"Balloon%d", aniId] usingBlock:^(SKNode *node, BOOL *stop) {
        [node runAction:[SKAction moveToY:50 duration:1]];
        SKAction *removeTime= [SKAction sequence:@[
                                                [SKAction waitForDuration:1.1],
                                                [SKAction performSelector:@selector(removeBalloon)
                                                                 onTarget:self]

                                                ]];
        [self runAction:removeTime];
    }];
}

-(void)removeBalloon
{
    removeId+=1;
    [self enumerateChildNodesWithName:[NSString stringWithFormat:@"Balloon%d", removeId] usingBlock:^(SKNode *node, BOOL *stop) {
        [node removeFromParent];
    }];

}
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    /* Called when a touch begins */

   }

-(void)update:(CFTimeInterval)currentTime {
    /* Called before each frame is rendered */
}

@end

如何制作一系列物品

1 个答案: