Swift Collection 视图水平和垂直滚动

Question

i want to make this Collection view that can scroll horizontal and vertical....but i wanna make something like this

https://giphy.com/gifs/lWshqs2BuvilYuE4Fl/html5

from what i see theres like Collection view and some segmented controll on top of that Collection view...... i mean my only problem is how can i scroll horizontal from anywhere on screen?

like i dont have to scroll from that top segmented control, i can also swipe it from that collection view thing

Any idea how to make this? cause i really dont know if im right or not.....

Thanks

*edit, i cant use library, so i guess i need something that really do it by manual, and for the horizontal scroll i need a dynamic data, i dunno paging controller can use a dynamic data cause as long as i know its static data.

Answer 1

• take a viewcontroller

• add a view2 give it top constrain and height to 44

• add scrollview and give apropreate constrain (programaticaly or using storyborad choice is your)

• add 3 buttons for voucher , subscription , misson .

• create 3 diffrent ViewControllers for voucher, subscription, misson.

• add 3 viewcontrollers in scrollview

// define this variable globally
var previousPageXOffset: CGFloat = 0.0
var pagenumber = 0

// add this in viewdidload
let aViewController = self.storyboard!.instantiateViewController(withIdentifier: "voucher") as! voucher

  let bViewController = self.storyboard!.instantiateViewController(withIdentifier: "subscription") as! subscription
  
  let cViewController = self.storyboard!.instantiateViewController(withIdentifier: "misson") as! misson
  
  let bounds = UIScreen.main.bounds
  let width = bounds.size.width
  let height = CGFloat(1.0)
  
  let viewControllers = [aViewController, bViewController, cViewController]
  
  self.scrollview!.contentSize = CGSize(width: CGFloat(self.totalscreen)*width, height: height)
  
  var idx:Int = 0
  
  for viewController in viewControllers {
      self.addChild(viewController)
      let originX:CGFloat = CGFloat(idx) * width
      viewController.view.frame = CGRect(x: originX, y: 0, width: self.scrollview.frame.width, height: self.scrollview.frame.height)
      self.scrollview!.addSubview(viewController.view)
      print("change")
      viewController.didMove(toParent: self)
      idx+=1
  }

// delegate for scrollview 

extension yourVC: UIScrollViewDelegate{
  
  func scrollViewDidEndScrollingAnimation(_ scrollView: UIScrollView) {
      
      previousPageXOffset = scrollView.contentOffset.x
  }
  
  func scrollViewWillEndDragging(_ scrollView: UIScrollView, withVelocity velocity: CGPoint, targetContentOffset: UnsafeMutablePointer<CGPoint>) {
      
      let targetOffset = targetContentOffset.pointee
      
      if targetOffset.x == previousPageXOffset {
          // page will not change
      } else if targetOffset.x < previousPageXOffset {
          print("left")
          pagenumber = pagenumber - 1
      } else if targetOffset.x > previousPageXOffset {
          print("ryt")
          pagenumber = pagenumber + 1
      }
      
      if pagenumber <= 0 {
          
          //set buttons colors or bottom line in your case if first page is selected
          
      }else if pagenumber == 1{
          //set buttons colors or bottom line in your case if second page is selected
      }else{
          //set buttons colors or bottom line in your case if third page is selected
      }
      print(pagenumber)
      previousPageXOffset = targetOffset.x
      print(previousPageXOffset)
  }
}

• function for spacific button(top 3 buttons) click

    func scrollToPage(page: Int, animated: Bool) {
        var frame: CGRect = self.scrollview.frame
        frame.origin.x = frame.size.width * CGFloat(page)
        frame.origin.y = 0
        self.scrollview.scrollRectToVisible(frame, animated: animated)
    }

i hope it will work for you :)

Answer 2

add collection view to every single view controller(screen), and apply Parchment framework for your required output.

you can get more information about Parchment on :- https://github.com/rechsteiner/Parchment

attaching some similar frameworks (select according to your requirement)

• https://github.com/kitasuke/PagingMenuController
• https://github.com/tamanyan/SwiftPageMenu
• https://github.com/EndouMari/TabPageViewController
• https://github.com/PageMenu/PageMenu