In an attempt to figure out how well gesture recognizers work, I've built a very simple app that uses a UIPanGestureRecognizer and using them to construct a UIBezierPath that I then stroke, but I am getting strange artifacts on the resulting drawing operation (see http://cl.ly/0N2R411O1t1x3w2N3Q3q for example).
The code I use is fairly simple; I start with a call to -moveToPoint:, followed by a bunch of -addLineToPoint: calls. Other than the fact that I am recording the points using touch, there is nothing unusual in the code (that I can see): - (void) pannedRefineEdge:(UIPanGestureRecognizer *) recognizer { switch (recognizer.state) { case UIGestureRecognizerStateBegan: _path = [[UIBezierPath alloc] init]; [_path moveToPoint:[recognizer locationInView:self.backgroundView]]; break; case UIGestureRecognizerStateChanged: [_path addLineToPoint:[recognizer locationInView:self.backgroundView]]; break; case UIGestureRecognizerStateEnded: // This calls a function that sets up an image drawing context and then: _path.lineCapStyle = kCGLineCapRound; _path.lineJoinStyle = kCGLineJoinRound; _path.lineWidth = 10.0; [[UIColor colorWithRed:1.0 green:0.6 blue:0.6 alpha:1.0] setStroke]; [_path stroke]; break; default: break; } } Any ideas what could be causing the problem? Thanks, Marco _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com