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POHow to change color of the brush on button click?
 

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  1. POHow to change color of the brush on button click?
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    <p>I am developing a paint app for my first try in iOS development.</p> <p>I am trying to make a color palette that will change my brush's color on button click but i don't know how. I already have UIButtons that are connected to its reference outlets and sent event but my codes are not working.</p> <p>here:</p> <pre><code> - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { touchSwiped = YES; redAmt = 0; blueAmt = 0; greenAmt = 0; UITouch *touch = [touches anyObject]; CGPoint currentTouch = [touch locationInView:self.view]; currentTouch.y -= 20; UIGraphicsBeginImageContext(self.view.frame.size); [touchDraw.image drawInRect:CGRectMake(0, 0, touchDraw.frame.size.width, touchDraw.frame.size.height)]; CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound); CGContextSetLineWidth(UIGraphicsGetCurrentContext(), 35.0); CGContextSetRGBStrokeColor(UIGraphicsGetCurrentContext(), redAmt, blueAmt, greenAmt, 1.0); CGContextBeginPath(UIGraphicsGetCurrentContext()); CGContextMoveToPoint(UIGraphicsGetCurrentContext(), endingPoint.x, endingPoint.y); CGContextAddLineToPoint(UIGraphicsGetCurrentContext(), currentTouch.x, currentTouch.y); CGContextStrokePath(UIGraphicsGetCurrentContext()); touchDraw.image = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); endingPoint = currentTouch; touchMoved++; if (touchMoved == 10) { touchMoved = 0; } } -(IBAction)blackInk:(id)sender { redAmt = 0; blueAmt = 0; greenAmt = 0; } -(IBAction)blueInk:(id)sender { redAmt = 0; blueAmt = 0; greenAmt = 1; } -(IBAction)redInk:(id)sender { redAmt = 1; blueAmt = 1; greenAmt = 0; } -(IBAction)greenInk:(id)sender { redAmt = 0; blueAmt = 1; greenAmt = 0; } </code></pre>
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    1. USSeongHo
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