Question

我正在使用SpriteKit构建游戏。以下是我坚持的地方。

我将SKSpriteNode放置在场景中并通过递减它的X位置来更新它的位置

- (void)update:(NSTimeInterval)currentTime

方法

但是当节点到达X：594时，它就停留在那里。并没有移动后记。我不明白为什么会这样。

这是我正在使用的SKSPriteNode，其中单独的类为“BirdNode”

@property (strong,nonatomic) SKAction * flap;
@property (strong,nonatomic) SKAction * flapForever;

- (id)initWithImages:(NSArray *)images
{
    if(self = [super init]) {

    NSMutableArray *textures = @[].mutableCopy;
    for (NSString *imageName in images) {
        SKTexture* birdTexture = [SKTexture textureWithImageNamed:imageName];
        birdTexture.filteringMode = SKTextureFilteringNearest;
        [textures addObject:birdTexture];
    }

    DebugLog(@"Textures = %@",textures);
    self = [BirdNode spriteNodeWithTexture:[textures objectAtIndex:0]];

    self.flap = [SKAction animateWithTextures:textures timePerFrame:0.02];
    self.flapForever = [SKAction repeatActionForever:self.flap];

    [self setTexture:[textures objectAtIndex:0]];

    [self setPhysicsBody:[SKPhysicsBody bodyWithRectangleOfSize:self.size]];
    [self.physicsBody setCategoryBitMask:obstacleBitMask];
    [self.physicsBody setContactTestBitMask:playerBitMask];
    [self.physicsBody setDynamic:YES];

    [self runAction:self.flapForever withKey:@"flapForever"];
    return self;
}

+ (NSArray *)birdImages:(int)number {
    NSMutableArray *birds = @[].mutableCopy;
    for (int i = 0; i < 25; i ++) {
        NSString *birdImage = @"";
        birdImage = [birdImage stringByAppendingFormat:@"flying_bird%d",number];
        birdImage = [birdImage stringByAppendingString:(i+1)<10?@"0":@""];
        birdImage = [birdImage stringByAppendingFormat:@"%d",i+1];
        [birds addObject:birdImage];
    }
    return birds;
}

在Scene中添加上述SPriteNode。

BirdNode *bird = [[BirdNode alloc] initWithImages:[BirdNode birdImages:1]];
bird.anchorPoint = CGPointZero;
bird.physicsBody.categoryBitMask = obstacleBitMask;
bird.physicsBody.contactTestBitMask = playerBitMask;
bird.physicsBody.dynamic = YES;
bird.name = @"Bird";
bird.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:bird.size];
bird.position = CGPointMake(1000, 240);

[self addChild:bird];
[Nodes addObject:bird];

这是我更新Node的位置的方法。

- (void)update:(NSTimeInterval)currentTime
{
    [self updateNodes:currentTime];
}

- (void) updateNodes:(NSTimeInterval)currentTime
{
    //Here nbNodes = [Nodes count];
    for(int i = 0; i < nbNodes; i ++) {
        BirdNode *bird = Nodes[i];
        bird.position = CGPointMake(bird.frame.origin.x - 3, bird.frame.origin.y);
    }
}

但是，当一只鸟从1000到达X位置594时卡住了。黑客攻击我做错了什么。如何解决这个问题。

请帮帮我。

SpriteNode不在场景中移动

0 个答案: