Create custom UIPageViewController – objective C

UIPageControl in IOS is a control that is used mostly in help screens or info screens for IOS apps. In this we are going to create a small tutorial for custom UIPageControl using UIScrollView and UIPagecontrol in which we will change background color of UIImageView as per page number selected by user on tapping on UIPageControl or swiping UIScrollView. UIScrollView is used with UIPageControl as the page control itself is set of dots and does not has display interface. We are not covering the default UIPageViewController provided by default in xcode,

Check swift version of this tutorial: Learn how to create UIPageControl in swift

So let us dive in to custom UIPageControl Tutorial.

Create a singleView application, and name it UIPageControlDemo. After creating the project Xcode will display you below shown screen

Main Interface after creating project in Xcode

Now, click on Main.storyboard and select View Controller. Drag UIPageControl and UIScrollView to view.

Drag UIPageControl and UIScrollView to view

Now open ViewController.h and create IBOutlets for UIPageControl and UIScrollView and an IBAction changePage that we are going to assign to UIPageControl ValueChanged event so that we can detect that user has taped on UIPageControl.

Open Main.storyboard and connect IBOutlets and IBAction to UIScrollView and UIPageControl

Connecting UIScrollView With IBOutlet

Connecting UIPageControl valueChanged event With IBAction

 

Setting IBAction to UIPageControl ValueChanged Event

UIPageControl has properties to set minimum number of pages you want in your UIPageControl and which page do you want to set as current page. We will stick with default values for this tutorial.

Set minimum pages and current page for UIPageControl

Open ViewController.m, as we have to implement our IBAction definition here

Inside viewDidLoad method, we will add UIImageView to our scroll and assign its delegate to self.
We will set contentSize of scroll to number of pages we want in UIPageControl multiplied by width of UIScrollView.

Then, we add three UIImageView to our scroll and set different background color to it.

Note: SCROLLWIDTH is width of our UIScrollView.

 In our changePage action, we will use scrollRectToVisible  method of UIScrollView so that we can scroll our UIScrollView as per user tap on UIPageControl.