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 :)
