触摸时更改图像

Question

我需要一张图像在触摸时自行更改。

目前，变化的图像是下一个产生而不是自我的图像。

@implementation MyScene2
{
    Marsugo *marsugo;
    SKAction *actionMoveDown;
    SKAction *actionMoveEnded;
    SKTexture *rescued;

}

-(id)initWithSize:(CGSize)size
{
    if (self = [super initWithSize:size]) {

        // Initializes Background
        self.currentBackground = [Background generateNewBackground];
        [self addChild:self.currentBackground];


    }
    return self;
}

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    for (UITouch *touch in touches) {

        NSArray *nodes = [self nodesAtPoint:[touch locationInNode:self]];

        for (SKNode *node in nodes) {
            if ([node.name isEqualToString:playerObject]) {

                rescued = [SKTexture textureWithImageNamed:@"rescued"];
                marsugo.texture = rescued;

       // this is changing the image of the next marsugo that spawns instead of self.         
            }
        }
    }
}

-(void)addMarsugos
{
// the marsugo is being initialized inside this method, that might be the issue i believe
    // Create sprite
    marsugo = [[Marsugo alloc]init];
    marsugo.xScale = 0.3;
    marsugo.yScale = 0.3;
    marsugo.zPosition = 75;

    // Bounds + Spawn Positions
    int minX = marsugo.size.width;
    int maxX = self.frame.size.width - marsugo.size.width;
    int rangeX = maxX - minX;
    int actualX = (arc4random() % rangeX) + minX;
    marsugo.position = CGPointMake(actualX, self.frame.size.height + 50);
    [self addChild:marsugo];

    // Spawn Timer
    int minDuration = 1;
    int maxDuration = 10;
    int rangeDuration = maxDuration - minDuration;
    int actualDuration = (arc4random() % rangeDuration) + minDuration;

    // Movement Actions
    actionMoveDown = [SKAction moveTo:CGPointMake(actualX, CGRectGetMinY(self.frame)) duration:actualDuration];
    actionMoveEnded = [SKAction removeFromParent];
    [marsugo runAction:[SKAction sequence:@[actionMoveDown, actionMoveEnded]]];

    NSLog(@"Marsugo X: %f - Speed: %i", marsugo.position.x, actualDuration);
}


@end

就像我之前说过的，我需要自我精灵来改变纹理，而不是“下一个产卵精灵”。

任何帮助解决此问题将不胜感激，谢谢。

Answer 1

您不想使用touchesBegan - 您最好使用点击手势识别器。下面我有_testView，它是我创建的一个实例变量，并添加到viewDidLoad中的视图中。然后我创建了一个轻敲手势识别器，在点击视图时调用一个函数，该函数会改变视图的颜色 - 但在您的情况下，您可以调用更改图像的函数：

- (void)viewDidLoad {
    [super viewDidLoad];

    // create the test view and add it as a subview
    _testView = [[UIView alloc] initWithFrame:CGRectMake(20, 100, 100, 100)];
    _testView.backgroundColor = [UIColor redColor];
    [self.view addSubview:_testView];

    // create the tap gesture recognizer and add it to the test view
    UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(changeColor)];
    [_testView addGestureRecognizer:tapGestureRecognizer];
}

- (void)changeColor {
    // here I'm changing the color, but you can do whatever you need once the tap is recognized
    _testView.backgroundColor = [UIColor blueColor];
}

这首先导致了这一点：

然后当我点击视图时：

Answer 2

您可以覆盖-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event课程中的Marsugo并更改其中的纹理。这样，您就不必检查触摸是否在您的节点内，因为如果不是，则不会调用该方法。