uiviewcontroller

Why can’t I call the default super.init() on UIViewController in Swift?

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The designated initialiser for UIViewController is initWithNibName:bundle:. You should be calling that instead. See http://www.bignerdranch.com/blog/real-iphone-crap-2-initwithnibnamebundle-is-the-designated-initializer-of-uiviewcontroller/ If you don’t have a nib, pass in nil for the nibName (bundle is optional too). Then you could construct a custom view in loadView or by adding subviews to self.view in viewDidLoad, same as you used to.

How does View Controller Containment work in iOS 5?

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The UIViewController docs are pretty clear on when and when not to call willMove/didMove methods. Check out the “Implementing a Container View Controller” documentation. The docs say, that if you do not override addChildViewController, you do not have to call willMoveToParentViewController: method. However you do need to call the didMoveToParentViewController: method after the transition is … Read more

presentViewController and displaying navigation bar

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It is true that if you present a view controller modally on the iPhone, it will always be presented full screen no matter how you present it on the top view controller of a navigation controller or any other way around. But you can always show the navigation bar with the following workaround way: Rather … Read more

Removing viewcontrollers from navigation stack

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Use this code and enjoy: NSMutableArray *navigationArray = [[NSMutableArray alloc] initWithArray: self.navigationController.viewControllers]; // [navigationArray removeAllObjects]; // This is just for remove all view controller from navigation stack. [navigationArray removeObjectAtIndex: 2]; // You can pass your index here self.navigationController.viewControllers = navigationArray; [navigationArray release]; Hope this will help you. Edit: Swift Code guard let navigationController = self.navigationController … Read more

How do I make a custom initializer for a UIViewController subclass in Swift?

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class ViewController: UIViewController { var imageURL: NSURL? // this is a convenient way to create this view controller without a imageURL convenience init() { self.init(imageURL: nil) } init(imageURL: NSURL?) { self.imageURL = imageURL super.init(nibName: nil, bundle: nil) } // if this view controller is loaded from a storyboard, imageURL will be nil required init?(coder aDecoder: … Read more

UIView touch event in controller

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You will have to add it through code. First, create the view and add it to the hierarchy: var myView = UIView(frame: CGRectMake(100, 100, 100, 100)) self.view.addSubview(myView) After that initialize gesture recognizer. Until Swift 2: let gesture = UITapGestureRecognizer(target: self, action: “someAction:”) After Swift 2: let gesture = UITapGestureRecognizer(target: self, action: #selector (self.someAction (_:))) Then … Read more

Storyboard – refer to ViewController in AppDelegate

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Have a look at the documentation for -[UIStoryboard instantiateViewControllerWithIdentifier:]. This allows you to instantiate a view controller from your storyboard using the identifier that you set in the IB Attributes Inspector: EDITED to add example code: UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:@”MainStoryboard” bundle: nil]; MyViewController *controller = (MyViewController*)[mainStoryboard instantiateViewControllerWithIdentifier: @”<Controller ID>”];

How do I create a custom iOS view class and instantiate multiple copies of it (in IB)?

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Swift example Updated for Xcode 10 and Swift 4 (and reportedly still works for Xcode 12.4/Swift 5) Here is a basic walk through. I originally learned a lot of this from watching this Youtube video series. Later I updated my answer based on this article. Add custom view files The following two files will form … Read more

Dismissing a Presented View Controller

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I think Apple are covering their backs a little here for a potentially kludgy piece of API. [self dismissViewControllerAnimated:NO completion:nil] Is actually a bit of a fiddle. Although you can – legitimately – call this on the presented view controller, all it does is forward the message on to the presenting view controller. If you … Read more