相关疑难解决方法(0)

我已经开始做一个小的swift/spritekit项目来教我自己的游戏开发.它以等距地图开始,我设法绘制.但是我在地图的不同瓷砖上获得精确的触摸位置时遇到了麻烦.它有效,但有点不合适,似乎不一致.

这是我的功能:

class PlayScene: SKScene {

let map = SKNode()
    override func didMoveToView(view: SKView) {

        let origin = view.frame.origin
        let mapOrigin = CGPointMake(origin.x + self.frame.width / 4, origin.y - self.frame.height / 4)


        let mapConfig: Int[][] =

       [[0, 0, 0, 0, 1, 0, 0, 0],
        [0, 0, 0, 0, 1, 0, 0, 0],
        [0, 0, 0, 0, 1, 0, 0, 0],
        [2, 2, 2, 2, 1, 2, 2, 2],
        [0, 0, 0, 0, 1, 0, 0, 0],
        [0, 0, 0, 0, …

我创建了一个非常简单的示例代码,只有一个场景,一个精灵节点20x20px,屏幕上的点0.0.当我调用scene.physicsWorld bodyAtPoint它时,即使在例如34x34点,也会返回此节点.但在35x35点它会返回null.所以基本上所有从0px到34px的点都返回此节点,从35px开始,它不再返回它.任何想法可能是什么原因,如果精灵明显以20px 20px结束？可以看到相同的行为bodyInRect.

以下是示例代码:

-(id)initWithSize:(CGSize)size {    
if (self = [super initWithSize:size]) {
    /* Setup your scene here */

    self.backgroundColor = [SKColor colorWithRed:0.15 green:0.15 blue:0.3 alpha:1.0];
    self.physicsWorld.gravity = CGVectorMake(0, 0);

    SKSpriteNode *node = [[SKSpriteNode alloc] initWithColor:[UIColor whiteColor] size:CGSizeMake(20, 20)];
    node.position = CGPointMake(10, 10);

    node.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:CGSizeMake(20, 20)];
    [self addChild:node];

}
return self;
}

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

for (UITouch *touch in touches) {
    CGPoint location = [touch locationInNode:self];
    if([self.physicsWorld bodyAtPoint:location])
    {
        NSLog(@"Detected at …