I found a workaround to force UIPageViewController to forget about cached view controllers of neighboring pages that are currently not displayed: pageViewController.dataSource = nil; pageViewController.dataSource = self; I do this everytime I change the set of pages. Of course this doesn’t affect the currently displayed page. With this workaround I avoid the caching bug and … Read more
It’ll only get called if the view is visible, and dirty. Maybe the problem is in the code that creates the view, or in your Nib, if that’s how you’re creating it? You’ll also sometimes see breakpoints failing to get set properly if you’re trying to debug a “Release” build. I somehow missed the first … Read more
As of 3.2, you can use the CALayer shadow properties. _textField.layer.shadowOpacity = 1.0; _textField.layer.shadowRadius = 0.0; _textField.layer.shadowColor = [UIColor blackColor].CGColor; _textField.layer.shadowOffset = CGSizeMake(0.0, -1.0);
Update: As of iOS 9 SDK, UIActionSheet is deprecated, so do not expect a fix regarding this issue. It is best to start using UIAlertController when possible. The problem seems to come from Apple’s switch to using UIAlertController internally to implement the functionality of alert views and action sheets. The issue is seen mostly on … Read more
They are different names because UIView and CALayer are different and have different terminology associated with them, but they are functionally equivalent. If you disassemble clipsToBounds you will see it just calls masksToBounds (disassembly from the simulator framework, so x86): -(BOOL)[UIView(Rendering) clipsToBounds] +0 3091938a 55 pushl %ebp +1 3091938b 89e5 movl %esp,%ebp +3 3091938d e800000000 … Read more
The only difference is in where the view is added: whether it is the frontmost view (addSubview:), or it is before the 5th subview, (insertSubview:atIndex:) or if it is immediately behind another subview (insertSubview:aboveSubview:).
With UIKit Apple added support for CGPoint to NSValue, so you can do: NSArray *points = [NSArray arrayWithObjects: [NSValue valueWithCGPoint:CGPointMake(5.5, 6.6)], [NSValue valueWithCGPoint:CGPointMake(7.7, 8.8)], nil]; List as many [NSValue] instances as you have CGPoint, and end the list in nil. All objects in this structure are auto-released. On the flip side, when you’re pulling the … Read more
You can set label’s border via its underlying CALayer property: #import <QuartzCore/QuartzCore.h> myLabel.layer.borderColor = [UIColor greenColor].CGColor myLabel.layer.borderWidth = 3.0 Swift 5: myLabel.layer.borderColor = UIColor.darkGray.cgColor myLabel.layer.borderWidth = 3.0
performSelector:withObject:afterDelay: Document Reference
There are probably multiple solutions to this problem, but one way or another, you’ll need to find a way to keep a reference to or communicate with the UIViewController. Because SwiftUI views themselves are pretty transient, you can’t just store a reference in the view itself, because it could get recreated at any time. Tools … Read more