问触摸坐标/位置失真

EN

-(void)addscratchView:(SKView*)view
    {
         CGRect viewFrame = CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.height, [UIScreen mainScreen].bounds.size.width);

        //ScratchableView : UIView
        myScratchView = [[ScratchView alloc]initWithFrame:viewFrame ];
        self.name = @"menuScene";
        [self.view addSubview:myScratchView];

    }

//  Created by Olivier Yiptong on 11-01-11.

#import "ScratchableView.h"


@implementation ScratchableView
@synthesize contentScale;

- (id)initWithFrame:(CGRect)frame {

    self = [super initWithFrame:frame];
    if (self) {

        scratchable = [UIImage imageNamed:@"scratchable.jpg"].CGImage;
        width = CGImageGetWidth(scratchable);
        height = CGImageGetHeight(scratchable);
        self.opaque = NO;
        CGColorSpaceRef colorspace = CGColorSpaceCreateDeviceGray();

        CFMutableDataRef pixels = CFDataCreateMutable( NULL , width * height );
        alphaPixels = CGBitmapContextCreate( CFDataGetMutableBytePtr( pixels ) , width , height , 8 , width , colorspace , kCGImageAlphaNone );
        provider = CGDataProviderCreateWithCFData(pixels);


        CGContextSetFillColorWithColor(alphaPixels, [UIColor blackColor].CGColor);
        CGContextFillRect(alphaPixels, frame);

        CGContextSetStrokeColorWithColor(alphaPixels, [UIColor whiteColor].CGColor);
        CGContextSetLineWidth(alphaPixels, 20.0);
        CGContextSetLineCap(alphaPixels, kCGLineCapRound);

        CGImageRef mask = CGImageMaskCreate(width, height, 8, 8, width, provider, nil, NO);
        scratched = CGImageCreateWithMask(scratchable, mask);

        CGImageRelease(mask);
        CGColorSpaceRelease(colorspace);
    }
    return self;
}

- (void)drawRect:(CGRect)rect {
    CGContextDrawImage(UIGraphicsGetCurrentContext() , [self bounds] , scratched);
}

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


    UITouch *touch = [[event allTouches] anyObject];
    if([[touch view] isKindOfClass:[UIImageView  class]]){
        CGPoint point= [touch locationInView:touch.view];
        NSLog(@"%f%f",point.x,point.y);

         location = point;
    }

    firstTouch = YES;
}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
    UITouch *touch = [[event touchesForView:self] anyObject];

    if (firstTouch) {
        firstTouch = NO;
        previousLocation = [touch previousLocationInView:self];
    } else {
        location = [touch locationInView:self];
        previousLocation = [touch previousLocationInView:self];
    }

    // Render the stroke
    [self renderLineFromPoint:previousLocation toPoint:location];
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
    UITouch *touch = [[event touchesForView:self] anyObject];
    if (firstTouch) {
        firstTouch = NO;
        previousLocation = [touch previousLocationInView:self];

        [self renderLineFromPoint:previousLocation toPoint:location];
    }
}

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

- (void) renderLineFromPoint:(CGPoint)start toPoint:(CGPoint)end {

    CGContextMoveToPoint(alphaPixels, start.x, start.y);
    CGContextAddLineToPoint(alphaPixels, end.x, end.y);
    CGContextStrokePath(alphaPixels);
    [self setNeedsDisplay];
}

- (void)dealloc {
    CGContextRelease(alphaPixels);
    CGImageRelease(scratchable);
    CGDataProviderRelease(provider);
}

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

    self.userInteractionEnabled = YES;

    SKView * skView = (SKView *)self.view;
    skView.showsFPS = YES;
    skView.showsNodeCount = YES;

   // [self createButtons ];
    [self addscratchView:view]; //for testing


}

-(void)addscratchView:(SKView*)view
{
     CGRect viewFrame = CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.height, [UIScreen mainScreen].bounds.size.width);

    myScratchView = [[ScratchView alloc]initWithFrame:viewFrame ];
    self.name = @"menuScene";
    [self.view addSubview:myScratchView];

}

    //convert between view coordinates and scene coordinates
    //coordinate system is not the same in a Sprite Kit scene as they are in a UIView
    UITouch *touch = [[event allTouches] anyObject];
   CGPoint touchlocation = [touch locationInView:touch.view];
    spriteView = (Menu *) spriteView.scene.view;

    CGPoint positionInScene = [self convertPoint:touchlocation fromCoordinateSpace:spriteView.scene.view];