移动Sprite移动触摸

Question

我正在使用touches move方法移动精灵。 当前精灵跳转到触摸屏幕的点但是我希望精灵只在直接触摸时移动。

我的代码：

-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {

    for (UITouch *touch in touches) {

        CGPoint location = [touch locationInNode:self];
        CGPoint newPosition = CGPointMake(location.x, self.size.height/2);

        self.sprite.position = newPosition;
     }
 }

Answer 1

检查触摸位置是否在精灵内部，如下所示：

-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *touch = [touches anyObject];
    CGPoint positionInScene = [touch locationInNode:self];
    if(CGRectContainsPoint(self.sprite.boundingBox,positionInScene)) {

        CGPoint newPosition = CGPointMake(positionInScene.x, self.size.height/2);

        self.sprite.position = newPosition;
    }
}