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POHow to remove dots from lines while drawing paint brush in iphone?
 

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  1. POHow to remove dots from lines while drawing paint brush in iphone?
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    <p><img src="https://i.stack.imgur.com/BkreR.png" alt="enter image description here">I am using following code to create the paint brush in iphone.</p> <pre><code>@interface Canvas : UIImageView { CGPoint location; } @property CGPoint location; .m file @synthesize location; - (void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [touches anyObject]; self.location = [touch locationInView:self]; } - (void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [touches anyObject]; CGPoint currentLocation = [touch locationInView:self]; UIGraphicsBeginImageContext(self.frame.size); CGContextRef ctx = UIGraphicsGetCurrentContext(); //CGContextSetBlendMode(ctx, kCGBlendModeOverlay); [self.image drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)]; CGContextSetLineCap(ctx, kCGLineCapRound); CGContextSetBlendMode(ctx, kCGBlendModeNormal); CGContextSetLineWidth(ctx, 5.0); CGContextSetRGBStrokeColor(ctx, 1.0, 0.0, 0.0, 1.0); //CGContextSetBlendMode(ctx, kCGBlendModeOverlay); CGContextBeginPath(ctx); CGContextMoveToPoint(ctx, location.x, location.y); CGContextAddLineToPoint(ctx, currentLocation.x, currentLocation.y); CGContextStrokePath(ctx); self.image = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); location = currentLocation; } - (void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [touches anyObject]; CGPoint currentLocation = [touch locationInView:self]; UIGraphicsBeginImageContext(self.frame.size); CGContextRef ctx = UIGraphicsGetCurrentContext(); // CGContextSetBlendMode(ctx, kCGBlendModeOverlay); [self.image drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)]; CGContextSetBlendMode(ctx, kCGBlendModeNormal); CGContextSetLineCap(ctx, kCGLineCapRound); CGContextSetLineWidth(ctx, 5.0); CGContextSetRGBStrokeColor(ctx, 1.0, 0.0, 0.0, 1.0); CGContextBeginPath(ctx); CGContextMoveToPoint(ctx, location.x, location.y); CGContextAddLineToPoint(ctx, currentLocation.x, currentLocation.y); CGContextStrokePath(ctx); self.image = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); location = currentLocation; } </code></pre> <p>It's working but while drawing there are some dots after certain distance in line which is being drawn.i want to remove those dots and want smooth straight line.How can i achieve this?</p>
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