Who knew there are so many ways to draw a circle? TL;DR: If you want to use CAShapeLayer and still get smooth circles, you’ll need to use shouldRasterize and rasterizationScale carefully. Original Here’s your original CAShapeLayer and a diff from the drawRect version. I made a screenshot off my iPad Mini with Retina Display, then … Read more
the whole autoresizing business is view-specific. layers don’t autoresize. what you have to do — in code — is to resize the layer yourself e.g. in a viewController you would do – (void) viewDidLayoutSubviews { [super viewDidLayoutSubviews]; //if you want superclass’s behaviour… // resize your layers based on the view’s new frame self.editViewBorderLayer.frame = self.editView.bounds; … Read more
You want to wrap your call in the following: [CATransaction begin]; [CATransaction setValue: (id) kCFBooleanTrue forKey: kCATransactionDisableActions]; layer.position = CGPointMake(x, y); [CATransaction commit];
Because shadow is an effect done outside the View, and that masksToBounds set to YES will tell the UIView not to draw anything that is outside itself. If you want a roundedCorner view with shadow I suggest you do it with 2 views: UIView *view1 = [[UIView alloc] init]; UIView *view2 = [[UIView alloc] init]; … Read more
For anyone else wondering how to draw an inner shadow using Core Graphics as per Costique’s suggestion, then this is how: (on iOS adjust as needed) In your drawRect: method… CGRect bounds = [self bounds]; CGContextRef context = UIGraphicsGetCurrentContext(); CGFloat radius = 0.5f * CGRectGetHeight(bounds); // Create the “visible” path, which will be the shape … Read more
clearColor has a black color channel with an alpha of 0, so I had to use [UIColor colorWithWhite:1 alpha:0] and it works fine.
Short answer — You need to set the contents scaling: textLayer.contentsScale = [[UIScreen mainScreen] scale]; A while ago I learned that when you have custom drawing code, you have to check for the retina display and scale your graphics accordingly. UIKit takes care of most of this, including font scaling. Not so with CATextLayer. My … Read more
I used the same approach that Solin used, but there’s a typo in that code. The method should be: – (void)layoutSubviews { [super layoutSubviews]; // resize your layers based on the view’s new bounds mylayer.frame = self.bounds; } For my purposes, I always wanted the sublayer to be the full size of the parent view. … Read more
On iOS, every UIView is backed by a Core Animation CALayer, so you are dealing with CALayers when using a UIView, even though you may not realize it. Unlike NSViews on the Mac, which evolved before Core Animation existed, UIViews are intended to be lightweight wrappers around these CALayers. As I describe in the similar … Read more
I was able to duplicate your problem. This is what fixed it for me. Add QuartzCore.framework to your project and this line to your .m file. #import <QuartzCore/QuartzCore.h>