IOS：ペイントアプリを

-3

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event 
{ 
    mouseSwiped = NO; 
    UITouch *touch = [touches anyObject]; 

    lastPoint = [touch locationInView:draw]; 
} 

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event 
{ 
    mouseSwiped = YES; 

    UITouch *touch = [touches anyObject]; 
    CGPoint currentPoint = [touch locationInView:draw]; 

    UIGraphicsBeginImageContext(draw.frame.size); 
    [draw.image drawInRect:CGRectMake(0, 0, draw.frame.size.width, draw.frame.size.height)]; 
    CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound); 
    CGContextSetLineWidth(UIGraphicsGetCurrentContext(), size); 

    //eraser 
    if (lastColor == 17){ 
     CGContextSetRGBStrokeColor(UIGraphicsGetCurrentContext(), 0, 0, 0, 0); 
     CGContextSetBlendMode(UIGraphicsGetCurrentContext(), kCGBlendModeCopy); 
    } 

    else CGContextSetRGBStrokeColor(UIGraphicsGetCurrentContext(), r, g, b, a); 

     CGContextBeginPath(UIGraphicsGetCurrentContext()); 
     CGContextMoveToPoint(UIGraphicsGetCurrentContext(), lastPoint.x, lastPoint.y); 
     CGContextAddLineToPoint(UIGraphicsGetCurrentContext(), currentPoint.x, currentPoint.y); 
     CGContextStrokePath(UIGraphicsGetCurrentContext()); 
     draw.image = UIGraphicsGetImageFromCurrentImageContext(); 
     UIGraphicsEndImageContext(); 

     lastPoint = currentPoint; 

     mouseMoved++; 

    if (mouseMoved == 10) { 
     mouseMoved = 0; 
    } 
} 

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

出典

2011-12-16 CrazyDev

これは質問、ランダムコードダンプを尋ねるためのサイトです質問ではありません！ –

あなたのコードを取り戻す、これは私たちが探しているものではありません。 – user1084683

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