如何在縮放後校準一個精靈touchLocation

Question

我在背景精靈上添加一個精靈，然後縮放（捏）背景，並通過該精靈。

縮放後，我想能夠在「縮放」的精靈上點擊右鍵，然後移動（平移）它。但是，要捕捉精靈，我必須點擊精靈之外。我想這是由於縮放和座標。

我真的需要一些幫助如何使它，使我總是隻需要點擊實際的精靈，如果它在原始狀態或放大或縮小。

我也將實現UIScrollView，所以我可以在背景中移動，但想先解決這個問題。

這裏是我用來測試這個代碼：

- (void)didMoveToView:(SKView *)view { 

_background = [SKSpriteNode spriteNodeWithImageNamed:@"background"]; 
_background.name = @"background"; 
[_background setAnchorPoint:CGPointZero]; 
// _background.anchorPoint = CGPointMake(0.0, 0.1); 
self.scaleMode = SKSceneScaleModeResizeFill; 
[self addChild:_background]; 

SKLabelNode *texT = [SKLabelNode labelNodeWithFontNamed:@"Ariel"]; 
texT.text = @"X"; 
texT.position = CGPointMake(160, 260); 
[_background addChild:texT]; 

_panGesture = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(handlePan:)]; 
[self.view addGestureRecognizer:_panGesture]; 

_pinchGesture = [[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(handlePinch:)]; 
[self.view addGestureRecognizer:_pinchGesture]; 

/* Setup your scene here */ 

self.backgroundColor = [SKColor colorWithRed:0.15 green:0.15 blue:0.3 alpha:1.0]; 
SKSpriteNode *sprite = [SKSpriteNode spriteNodeWithImageNamed:@"Spaceship"]; 
sprite.xScale = 0.2; 
sprite.yScale = 0.2; 
sprite.position = CGPointMake(160, 260); 
sprite.name = @"sprite"; 
[_background addChild:sprite]; 
} 

- (void)handlePan:(UIPanGestureRecognizer *)sender { 
NSLog(@"handlePan:"); 
if (![_currentNode.name isEqualToString:@"background"]) { 
    _touchLocation = [sender locationInView:sender.view]; 
    _touchLocation = [self convertPointFromView:_touchLocation]; 
    _currentNode.position = _touchLocation; 
} 
} 

- (void)handlePinch:(UIPinchGestureRecognizer *) sender { 
NSLog(@"handlePinch: %f",sender.scale); 
[self runAction:[SKAction scaleBy:sender.scale duration:0]]; 
sender.scale = 1; 
} 

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { 
NSLog(@"touchesBegan"); 
//////DO THE FIRST TOUCH////// 
_actualTouch = [touches anyObject]; 
_touchLocation = [_actualTouch locationInNode:self]; 
_currentNode = [self nodeAtPoint:_touchLocation]; 
NSLog(@"TouchBegan:_touchLocation:%@", NSStringFromCGPoint(_touchLocation)); 
NSLog(@"_currentNode.name: %@", _currentNode.name); 
} 

@end 

Answer 1

我有這個同樣的問題，我發現，解決辦法是調整，而不是規模。物理學似乎仍然按預期工作，現在觸摸事件也將如此。我遇到了這個解決方案here。您的didMoveToView中的scaleMode也需要更改，請參見下文。

self.scaleMode = SKSceneScaleModeAspectFill; 


- (void)handlePinch:(UIPinchGestureRecognizer *) sender { 
NSLog(@"handlePinch: %f",sender.scale); 
//[self runAction:[SKAction scaleBy:sender.scale duration:0]]; 
self.size = CGSizeMake(self.size.width/sender.scale,self.size.height/sender.scale); 
sender.scale = 1; 
} 

在我自己的實現中，我還設置了縮放級別的上限和下限。