触摸时更改图像

Question

我需要一幅图像来改变自己。

目前，更改的图像是下一个生成的图像，而不是自身。

@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

就像我之前说的，我需要使用自定义精灵来更改纹理，而不是“下一个生成精灵”。

修复此问题的任何帮助将不胜感激，谢谢。

Answer 1

您不想使用touchesBegan-最好使用点击手势识别器。 在下面，我有_testView，这是我创建的实例变量，并将其添加到viewDidLoad中的视图中。 然后，我创建了一个轻击手势识别器，该轻击手势识别器会在点击视图时调用一个函数，并且该函数会更改视图的颜色-但在您这种情况下，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];
}

首先导致以下结果：

然后，当我点击视图时：

Answer 2

您可以在Marsugo类中重写-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event并在那里更改纹理。 这样，您就不必检查触摸是否在您的节点内部，因为如果不是，则不会调用该方法。