Custom header content animate while scrolling in swift

Question

I have created custom header but I don't know how to animate while scrolling.

Please check below image and let me know how to animate while scrolling. This animated header in Fotmob app.

so you don't have any code? you want us to do that for you? It is hard to know what you are working with, it is a header or navigation bar? — Lu_
– Lu_, Commented May 30, 2019 at 5:12
you can use -> scrollViewDidScroll(_ scrollView: UIScrollView) function and update title — Dhaval Umraliya
– Dhaval Umraliya, Commented May 30, 2019 at 5:13
One of these libraries might help you achieve something like this. This one is the closest to what you are looking for. github.com/vicentesuarez/Swift-FlexibleHeightBar Here are some other options.... github.com/telly/TLYShyNavBar github.com/tristanhimmelman/HidingNavigationBar github.com/andreamazz/AMScrollingNavbar — Cedan Misquith
– Cedan Misquith, Commented May 30, 2019 at 5:19
Hi it's called sticky header you can do this thing using stroyboard and with out storyboard too. please check this here is a good stuff you can achieved this thing :- medium.com/@jeremysh/… github.com/gskbyte/GSKStretchyHeaderView — Yogesh Patel
– Yogesh Patel, Commented May 30, 2019 at 6:36

skety777 · Accepted Answer · 2019-05-30 11:21:35Z

First of all add header view as UIvVew and add UIScrollView or UITableView below headerView same as screenshot and follow below step.

set a fixed height constraint to the header view (125 for example) and attach it to top, left and right.
make the UIScrollView below to use all the available space so set to zero top, bottom, left and right constraints.
connect the header view height constraint to the ViewController in order to have something like:
```
 @IBOutlet var headerViewHeightConstraint: NSLayoutConstraint!
```
set the UIScrollView delegate to the ViewController

declare two properties to limit the maximum and the minimum height of the header view, fox example:

let headerViewMaxHeight: CGFloat = 125
let headerViewMinHeight: CGFloat = 44 + UIApplication.shared.statusBarFrame.height

The entire workaround is based on update the header view height constraint while the UIScrollView is scrolling, so let’s implement the UIScrollViewDelegate and the most important delegate for our case, the scrollViewDidScroll:

func scrollViewDidScroll(_ scrollView: UIScrollView) {

    let headerViewMinHeight: CGFloat = 44 + UIApplication.shared.statusBarFrame.height

    let yPos = mainScrollView.contentOffset.y
    let newHeaderViewHeight: CGFloat = headerViewHeightConstraint.constant - yPos

    if newHeaderViewHeight > headerViewMaxHeight {
        // Here, Manage Your Score Format View
        headerViewHeightConstraint.constant = max(headerViewMaxHeight, newHeaderViewHeight)

    } else if newHeaderViewHeight < headerViewMinHeight {

    headerViewHeightConstraint.constant = headerViewMinHeight

    } else {

        headerViewHeightConstraint.constant = newHeaderViewHeight
        scrollView.contentOffset.y = 0 // block scroll view

    }
}

Sivabalaa Jothibose · Accepted Answer · 2020-04-01 15:42:32Z

0

I have created the same, Check the below image

Overview

TableView
Sample MVVM pattern
Swift 5.0 above
Xcode 11 above

Find the GIT URL for code

HeaderAnimation

answered Apr 1, 2020 at 15:42

Sivabalaa Jothibose

8009 silver badges16 bronze badges

1 Comment

Vivek Over a year ago

Thank you for creating a sample project, I'll check it.

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