In Xcode 4, in the left sidebar, select the project file at the top: 1) Make sure your target is selected in the main view, and you should see 5 tabs at the top, 2) Click the “Build Phases” tab, 3) Click the arrow to the left of the “Link Binary With Libraries” row, 4) … Read more
#import <QuartzCore/QuartzCore.h> …. // typically inside of the -(void) viewDidLoad method self.yourUITextView.layer.borderWidth = 5.0f; self.yourUITextView.layer.borderColor = [[UIColor grayColor] CGColor];
From what I understood, you just need a layer that draws a gradient, and CGContextDrawRadialGradient works perfectly for that need. And to reiterate on what you said, CAGradientLayer doesn’t support radial gradients, and nothing we can do about that, except unnecessary swizzling that can be done cleanly with a CALayer subclass. (note: the gradient drawing … Read more
I can at least show you a shortcut for drawing circles of arbitrary size. No OpenGL, no Core Graphics drawing needed. Import the QuartzCore framework to get access to the .cornerRadius property of your UIView or UIImageView. #import <QuartzCore/QuartzCore.h> Also manually add it to your project’s Frameworks folder. Add this method to your view controller … Read more
I was able to solve this with Jon Steinmetz suggestion. If any one cares, here’s the final solution: int radius = myRect.size.width; UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(0, 0, self.mapView.bounds.size.width, self.mapView.bounds.size.height) cornerRadius:0]; UIBezierPath *circlePath = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(0, 0, 2.0*radius, 2.0*radius) cornerRadius:radius]; [path appendPath:circlePath]; [path setUsesEvenOddFillRule:YES]; CAShapeLayer *fillLayer = [CAShapeLayer layer]; fillLayer.path = path.CGPath; fillLayer.fillRule = kCAFillRuleEvenOdd; … Read more
I’ve found a better method that uses the snapshot API whenever possible. I hope it helps. class func screenshot() -> UIImage { var imageSize = CGSize.zero let orientation = UIApplication.shared.statusBarOrientation if UIInterfaceOrientationIsPortrait(orientation) { imageSize = UIScreen.main.bounds.size } else { imageSize = CGSize(width: UIScreen.main.bounds.size.height, height: UIScreen.main.bounds.size.width) } UIGraphicsBeginImageContextWithOptions(imageSize, false, 0) for window in UIApplication.shared.windows { window.drawHierarchy(in: … Read more