How to add image with parallax effect above UITableView header and keep header sticky?

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旧时难觅i
旧时难觅i 2020-12-24 10:27

Here is an image that explains everything I want to do:

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My question is

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  •  慢半拍i
    慢半拍i (楼主)
    2020-12-24 10:35

    Swift 5

    as of my requirement i have used https://github.com/maxep/MXParallaxHeader

    i explained you the things step by step

    you need to install the above mentioned third party library by using this pod command

    1.)
    
    pod "MXParallaxHeader"
    

    open up commannd manager(Terminal) go to your target folder and run this command:

    2.)
    
    pod install
    

    you need a parallax effect of your image view and stick the header on the top you need to create the custom .xib file to user as a parallax header.

    3.) 
    
    Add new file choose a (User Interface) View as a new template and name the 
    file. eg.. ParallaxView and tap on the create.
    

    you have created UIView now you need to add the Cocoa Touch Class file for your custom view.

    4.) 
    
    Add new file choose a (Cocoa Touch Class) View as a new template and name the file. eg.. ParallaxView and tap on the Next.
    

    now you have pair of class file with its custom UIView eg.(ParallaxView.xib & ParallaxView.swift)

    and according to my project requirement i need to add a pagemenu in the bottom of the parallaxheader so i use a another third party library named CAPSPageMenu

    5.)
    
    just visit this https://github.com/PageMenu/PageMenu/blob/master/Classes/CAPSPageMenu.swift and download the CAPSPageMenu.swift file and drag from your downloads and drop to your project destination folder.
    

    now we are ready to go for the code part.

    Goto your ViewController file and import the frame work

    6.)
    
    import MXParallaxHeader
    

    delegate methods

     7.)
    
     class MyParralax: UIViewController, MXScrollViewDelegate, CAPSPageMenuDelegate 
     {// Parant Controller Code }
    

    Define the class (MyParralax.swift) variables for the controllers (for page menu )and (MXParallaxHeader)like this

    var scrollView      : MXScrollView!
    let Parallax        = Bundle.main.loadNibNamed("ParallaxView", owner: nil, options: nil)?.first as? ParallaxView
    let controller1     : VC1 = VC1.instantiateFromStoryboard()
    let controller2     : VC2 = VC2.instantiateFromStoryboard()
    var controllerArray : [UIViewController] = []
    var pageMenu        : CAPSPageMenu?
    

    you have to create two view controller file as a child view controller of the pagemenu and storyboard too.these both controller.swift (VC1 & VC2) will look like this.

    import UIKit
    
    class VC1: UIViewController {
        override func viewDidLoad() {
            super.viewDidLoad()
           // child conroller 
        }
    
        class func instantiateFromStoryboard() -> VC1
        {
            let storyboard = UIStoryboard(name: "Main", bundle: nil)
            return storyboard.instantiateViewController(withIdentifier: "VC1") as! VC1
        }
    }
    

    put this three functions in your parent controller(MyParralax.swift)

    func setParallaxMenu(){
            self.scrollView = MXScrollView()
            self.scrollView.backgroundColor  = UIColor.green
            self.scrollView.delegate = self
            self.scrollView.parallaxHeader.view = Parallax // You can set the parallax header view from a nib.
            self.scrollView.parallaxHeader.height = 446.0 // desired hieght or hight of the xib file
            self.scrollView.parallaxHeader.mode = MXParallaxHeaderMode.fill
            self.scrollView.parallaxHeader.minimumHeight = UIApplication.shared.statusBarFrame.size.height + (self.navigationController?.navigationBar.frame.height)!
            let newFrame = CGRect(x: 0,y: UIApplication.shared.statusBarFrame.size.height + (self.navigationController?.navigationBar.frame.height)!, width: self.view.frame.size.width, height: self.view.frame.size.height - (UIApplication.shared.statusBarFrame.size.height + (self.navigationController?.navigationBar.frame.height)!)) // scrollview's frame calculation
            scrollView.frame = newFrame
            scrollView.contentSize = newFrame.size
            self.scrollView.delegate = self
            view.addSubview(scrollView)
            self.pagemenuSetup()
        }
    
    
    func pagemenuSetup()
        {
            controllerArray.removeAll()
            controllerArray.append(controller1)
            controllerArray.append(controller2)
    
            controller1.title = "ORANGE"
            controller2.title = "YELLOW"
    
    
            // Customize menu (Optional)
            let parameters: [CAPSPageMenuOption] = [
                .menuItemSeparatorWidth(4.3),
                .scrollMenuBackgroundColor(UIColor(red: 25.0/255.0, green: 26.0/255.0, blue: 36.0/255.0, alpha: 1.0)),
                .viewBackgroundColor(UIColor.clear),
                .selectionIndicatorColor(UIColor.white),
                .bottomMenuHairlineColor(UIColor.clear),
                .unselectedMenuItemLabelColor(UIColor(red: 255.0/255.0, green: 255.0/255.0, blue: 255.0/255.0, alpha: 0.5)),
                .menuItemFont(UIFont(name: "Helvetica", size: 16.0)!),
                .enableHorizontalBounce(false),
                .menuHeight(52.0),
                .menuMargin(0.0),
                .menuItemWidth(self.view.bounds.width/2),
                .selectionIndicatorHeight(15.0),
                .menuItemSeparatorPercentageHeight(0.1),
                .iconIndicator(true),
                .iconIndicatorView(self.getIndicatorView())
            ]
            // Initialize scroll menu
            var frame = view.frame
            scrollView.frame = frame
            scrollView.contentSize = frame.size
            let Height = self.view.frame.size.height - (UIApplication.shared.statusBarFrame.size.height + (self.navigationController?.navigationBar.frame.height)!)
            frame.size.height = Height
            self.pageMenu = CAPSPageMenu(viewControllers: controllerArray, frame: frame, pageMenuOptions: parameters)
            pageMenu!.delegate = self
            self.scrollView.addSubview(pageMenu!.view)
            view.addSubview(scrollView)
        }
    
    
    private func getIndicatorView()->UIView
        {
            let imgView = UIImageView(frame: CGRect(x: 0, y: 0, width: self.view.bounds.width/2, height: 15.0))
            imgView.image = UIImage(named: "Indicator")
            imgView.contentMode = .scaleAspectFit
            return imgView
        }
    

    check this output.

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