uiwindow – Tarik Billa

iPhone – UIWindow rotating depending on current orientation?

January 2, 2024 by Tarik

You need to roll your own for UIWindow. Listen for UIApplicationDidChangeStatusBarFrameNotification notifications, and then set the the transform when the status bar changes. You can read the current orientation from -[UIApplication statusBarOrientation], and calculate the transform like this: #define DegreesToRadians(degrees) (degrees * M_PI / 180) – (CGAffineTransform)transformForOrientation:(UIInterfaceOrientation)orientation { switch (orientation) { case UIInterfaceOrientationLandscapeLeft: return CGAffineTransformMakeRotation(-DegreesToRadians(90)); … Read more

subclassing UIWindow while using storyboards

December 30, 2023 by Tarik

Passing touches between stacked UIWindows?

December 26, 2023 by Tarik

Convert a UIView origin point to its Window coordinate system

September 17, 2023 by Tarik

It sounds like your not converting between the proper views. A view’s frame is set to the coordinates of it’s superview, not its own internal coordinates, so if you were trying to convert the origin of a view to window coordinates, you would need to use the superview: [[self superview] convertPoint:self.frame.origin toView:theWindow]; However, it is … Read more

iOS – Get location of a view in a window?

September 16, 2023 by Tarik

Use can use the UIView method covertRect:toView to convert to the new co-ordinate space. I did something very similar: // Convert the co-ordinates of the view into the window co-ordinate space CGRect newFrame = [self convertRect:self.bounds toView:nil]; // Add this view to the main window [self.window addSubview:self]; self.frame = newFrame; In my example, self is … Read more

How to remove a UIWindow?

August 26, 2023 by Tarik

The correct way to hide a window is to set the hidden property to YES. To remove it from UIApplication’s windows property you just release the window (in ARC you set all references to nil). Of course you would want to have another window in place at this time.

Get Application’s main window

August 21, 2023 by Tarik

The UIApplicationDelegate usually has a reference to the “main window”: [[[UIApplication sharedApplication] delegate] window]; Furthermore, UIApplication has an array of windows [[UIApplication sharedApplication] windows]. See the UIApplication Class Reference.

What is the difference between UIApplication.sharedApplication.delegate.window and UIApplication.sharedApplication.keyWindow?

August 7, 2023 by Tarik

For most uses, they will be the same… but not always. [UIApplication sharedApplication].keyWindow is the window which is currently being displayed on the device. This is normally your application’s window, but could be a system window. [UIApplication sharedApplication].delegate.window is the window your application is expected to use. Which one should be used? Well that all … Read more

Unexpected nil window in _UIApplicationHandleEventFromQueueEvent

July 25, 2023 by Tarik

Additional to B H answer. Also look this answer. Got this issue when launching my landscape only app from portrait orientation (also the app shouldn’t be presented in recently opened apps list, which can be seen by pressing Home button twice. Perhaps, iOS somehow caches the orientation and window size). My code was self.window = … Read more

Why is main window of type double optional?

June 14, 2023 by Tarik

@matt has the details, but there is a (somewhat horrible, somewhat awesome) workaround. (See edit below, though) let window = app.delegate?.window??.`self`() I will leave the understanding of this line of code as an exercise for the reader. OK, I lie, let’s break it down. app.delegate?.window OK, so far so good. At this point we have … Read more