Simple way to add parallax header to UIScrollView/UITableView written in Swift.
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README.md

ParallaxHeader

Simple way to add parallax header to UIScrollView or it's subclasses.

One image view Slider with images Blur vibrant text Blur round icon
Demo Demo Demo Demo

Try it here

Contents

Requirements

  • iOS 8.0+
  • Xcode 8.0+
  • Swift 3.0+

Installation

CocoaPods

CocoaPods is a dependency manager for Cocoa projects. You can install it with the following command:

$ gem install cocoapods

CocoaPods 1.1.0+ is required to build Reusable 1.0.0+.

To integrate Reusable into your Xcode project using CocoaPods, specify it in your Podfile:

source 'https://github.com/CocoaPods/Specs.git'
platform :ios, '8.0'
use_frameworks!

target '<Your Target Name>' do
    pod 'ParallaxHeader', '~> 2.0.0'
end

Then, run the following command:

$ pod install

Cocoapods versions

  • Swift4 :
pod 'ParallaxHeader', '~> 2.0.0'
  • Swift3 :
pod 'ParallaxHeader', '~> 1.0.6'

Usage

To add parallax header to scroll view (table view) you need just create view and set it to your scroll view (table view).

Use case - one image view

  //create view as header view    
  let imageView = UIImageView()
  imageView.image = UIImage(named: "1")
  imageView.contentMode = .scaleAspectFill
        
  tableView.parallaxHeader.view = imageView
  tableView.parallaxHeader.height = 400
  tableView.parallaxHeader.minimumHeight = 0
  tableView.parallaxHeader.mode = .topFill

Use case - slider of images

let parallaxHeight: CGFloat = view.frame.height - 64 - 49 - sliderHeight
let layout = UICollectionViewFlowLayout()
layout.scrollDirection = .horizontal
collectionParallaxView = UICollectionView(
    frame: CGRect(x: 0, y: 0, width: view.frame.width, height: parallaxHeight),
    collectionViewLayout: layout
)
collectionParallaxView.isPagingEnabled = true
collectionParallaxView.showsHorizontalScrollIndicator = false
collectionParallaxView.backgroundColor = UIColor.white
collectionParallaxView.delegate = self
collectionParallaxView.dataSource = self

//adding view as parallax header to table view is straightforward
tableView.parallaxHeader.view = collectionParallaxView
tableView.parallaxHeader.height = parallaxHeight
tableView.parallaxHeader.minimumHeight = 0
tableView.parallaxHeader.mode = .centerFill
tableView.parallaxHeader.parallaxHeaderDidScrollHandler = { parallaxHeader in
    print(parallaxHeader.progress)
}

Use case - Blur vibrant text

  • Blur library is used here.
  • SnapKit library is used here.
let imageView = UIImageView()
imageView.image = UIImage(named: "profile")
imageView.contentMode = .scaleAspectFill
        
//setup blur vibrant view
imageView.blurView.setup(style: UIBlurEffectStyle.dark, alpha: 1).enable()
        
headerImageView = imageView
        
tableView.parallaxHeader.view = imageView
tableView.parallaxHeader.height = 400
tableView.parallaxHeader.minimumHeight = 40
tableView.parallaxHeader.mode = .centerFill
tableView.parallaxHeader.parallaxHeaderDidScrollHandler = { parallaxHeader in
    //update alpha of blur view on top of image view 
    parallaxHeader.view.blurView.alpha = 1 - parallaxHeader.progress
}
        
// Label for vibrant text
let vibrantLabel = UILabel()
vibrantLabel.text = "Vibrant"
vibrantLabel.font = UIFont.systemFont(ofSize: 40.0)
vibrantLabel.sizeToFit()
vibrantLabel.textAlignment = .center
imageView.blurView.vibrancyContentView?.addSubview(vibrantLabel)
//add constraints using SnapKit library
vibrantLabel.snp.makeConstraints { make in
    make.edges.equalToSuperview()
}

Use case - Blur round icon

  • Blur library is used here.
  • SnapKit library is used here.
let image = UIImage(named: "profile")
        
let imageView = UIImageView()
imageView.image = image
imageView.contentMode = .scaleAspectFill
parallaxHeaderView = imageView
        
//setup bur view
imageView.blurView.setup(style: UIBlurEffectStyle.dark, alpha: 1).enable()
        
tableView.parallaxHeader.view = imageView
tableView.parallaxHeader.height = 400
tableView.parallaxHeader.minimumHeight = 120
tableView.parallaxHeader.mode = .centerFill
tableView.parallaxHeader.parallaxHeaderDidScrollHandler = { parallaxHeader in
    //update alpha of blur view on top of image view
    parallaxHeader.view.blurView.alpha = 1 - parallaxHeader.progress
}
        
let roundIcon = UIImageView(
    frame: CGRect(x: 0, y: 0, width: 100, height: 100)
)
roundIcon.image = image
roundIcon.layer.borderColor = UIColor.white.cgColor
roundIcon.layer.borderWidth = 2
roundIcon.layer.cornerRadius = roundIcon.frame.width / 2
roundIcon.clipsToBounds = true
        
//add round image view to blur content view
//do not use vibrancyContentView to prevent vibrant effect
imageView.blurView.blurContentView?.addSubview(roundIcon)
//add constraints using SnpaKit library
roundIcon.snp.makeConstraints { make in
    make.center.equalToSuperview()
    make.width.height.equalTo(100)
}

Author

Roman Sorochak - iOS developer - roman.sorochak@gmail.com

License

ParallaxHeader is released under the MIT license. See LICENSE for details.