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What is iOS ViewController?
In iOS Development, a View Controller is responsible for displaying the data of our iOS application on the screen. It acts as an interface between its Views (created by the developer) and the application data. Each ViewController in the Storyboard is assigned a Class that inherits the UIViewController class.
What does ViewController swift do?
A view controller manages a single root view, which may itself contain any number of subviews. User interactions with that view hierarchy are handled by your view controller, which coordinates with other objects of your app as needed. Every app has at least one view controller whose content fills the main window.
What is ViewController swift file?
Every screen in your application is implemented by a view controller. A view controller has two parts: the designed part that’s in Storyboard and a Swift file that contains the code for that screen. If a screen in the application doesn’t require any code, then it can use the default UIViewController .
How do I get ViewController view?
If you are not familiar with the code and you want to find ViewController coresponding to given view, then you can try:
- Run app in debug.
- Navigate to screen.
- Start View inspector.
- Grab the View you want to find (or a child view even better)
- From the right pane get the address (e.g. 0x7fe523bd3000)
What is a storyboard in iOS?
A storyboard is a visual representation of the user interface of an iOS application, showing screens of content and the connections between those screens. In addition, a storyboard enables you to connect a view to its controller object, and to manage the transfer of data between view controllers.
Did load Swift?
viewDidLoad is the method that is called once the MainView of a ViewController has been loaded. This is called after loadView is called.In the image you can see the MainView and other views within it.
What is NIB in iOS?
A nib file is a special type of resource file that you use to store the user interfaces of iOS and Mac apps. A nib file is an Interface Builder document. iOS uses nibs as an implementation detail that supports storyboards, the iOS user interface design layout format.
Is storyboard easier than SwiftUI?
For now, the least you need to know is that SwiftUI fixes many problems people had with the old Swift + Interface Builder approach: We no longer have to worry about creating source control problems when committing user interface work, because code is much easier to read and manage than storyboard XML.
What is view did load in Swift?
Discussion. This method is called after the view controller has loaded its view hierarchy into memory. This method is called regardless of whether the view hierarchy was loaded from a nib file or created programmatically in the loadView() method.
What do view controllers do in an iOS app?
View controllers are fundamental building blocks of your iOS app. They govern what happens on-screen, from User Interfaces to animation, from interaction to navigation, and the many steps in between. In this tutorial, you’ll learn everything you need to know about view controllers.
What is the role of a view controller?
Most apps are a mixture of both types of view controllers. The most important role of a view controller is to manage a hierarchy of views. Every view controller has a single root view that encloses all of the view controller’s content. To that root view, you add the views you need to display your content.
How to change the background of app viewcontroller?
Select the Use Authomatic Reference Counting option, but unselect the Use Storyboard since we’re not going to use storyboards for this project. Press next and create the project. Then, select the APPViewController.xib file and change the background of the view to black color.
How to use page view controller in appcoda?
By implementing the data source protocol, we tell the page view controller what to display for each page. Open the APPViewController.h file and modify the @interface declaration, and add a new property to hold the UIPageViewController: Next, we have to implement at least two methods of the protocol: