Yes, it’s possible (only in the latest Core Animation releases though, I believe, i.e. iPhone 3.0+ and OS X 10.6+). Make your property dynamic so that CA implements the accessors for you: @dynamic myInt; Tell the layer that changes of the property require redrawing: + (BOOL)needsDisplayForKey:(NSString*)key { if ([key isEqualToString:@”myInt”]) { return YES; } else … 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
I made a right border using this: leftScrollView.clipsToBounds = YES; CALayer *rightBorder = [CALayer layer]; rightBorder.borderColor = [UIColor darkGrayColor].CGColor; rightBorder.borderWidth = 1; rightBorder.frame = CGRectMake(-1, -1, CGRectGetWidth(leftScrollView.frame), CGRectGetHeight(leftScrollView.frame)+2); [leftScrollView.layer addSublayer:rightBorder];
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
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
For labels, or views with rounded corners and or background colors and shadows on scrolling views the solution is pretty simple: The biggest issue is from the masksToBounds layer option. This appears to tax performance significantly, however the label seems to need this ON to mask the background color to rounded corners. So to get … Read more
Sounds like you want to render your layer into a UIImage. In that case, the method below should do the trick. Just add this to your view or controller class, or create a category on CALayer. Obj-C – (UIImage *)imageFromLayer:(CALayer *)layer { UIGraphicsBeginImageContextWithOptions(layer.frame.size, NO, 0); [layer renderInContext:UIGraphicsGetCurrentContext()]; UIImage *outputImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return outputImage; } … Read more
You can do this by setting the actions dictionary on the layer to return [NSNull null] as an animation for the appropriate key. For example, I use NSDictionary *newActions = @{ @”onOrderIn”: [NSNull null], @”onOrderOut”: [NSNull null], @”sublayers”: [NSNull null], @”contents”: [NSNull null], @”bounds”: [NSNull null] }; layer.actions = newActions; to disable fade in / … 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
Starting in iOS 3.2, you can use the functionality of UIBezierPaths to create an out-of-the-box rounded rect (where only corners you specify are rounded). You can then use this as the path of a CAShapeLayer, and use this as a mask for your view’s layer: // Create the path (with only the top-left corner rounded) … Read more