CODEWITHSUNDEEP
iosswiftswift3xlpagertabstrip
ASP
ASP

Reputation: 1974

Switch child viewcontrollers programmatically : XLPagerTabStrip

I have been using the XLPagerTabStrip to effectively create a tab bar at the top of my view controller, with multiple child view controllers displayed within it. Lets call Home as parent controller which extends ButtonBarPagerTabStripViewController. There are two child view controller, Child1 and Child2. Everything working perfect as I expected. But now I need a requirement, in which I have to switch child view controllers programmatically. ie, when a process(in child2) finished, it should trigger the switching the tab from Child 2 to Child1. I know there are couple of methods, 

func moveToViewController(at index: Int)
func moveToViewController(at index: Int, animated: Bool)
func moveTo(viewController: UIViewController)
func moveTo(viewController: UIViewController, animated: Bool)

but I don't know how to use it.

Upvotes: 2

Views: 3563

Answers (3)

Md. Shofiulla
Md. Shofiulla

Reputation: 2305

Here is the perfect solution to move any specific childview controller. You just need some delay to change viewcontroller

DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
     self.moveToViewController(at: 1, animated: true)
  }

call this lines of code inside viewDidLoad() method.

Upvotes: 1

Sarthak Sharma
Sarthak Sharma

Reputation: 246

**These methods can be used as following:

Will show how to use these functions through delegate

func moveToViewController(at index: Int) :

You need to pass the index of the target child controller, for this you can either call this func from your child controller by initialising the parent controller or you can set a delegate which will be implemented in your parent controller and should be triggered from your child view controller, ultimately it will select the target controller with animation.

 protocol MyDelegate {
   func selectChildControllerAtIndex(toIndex: Int!)
   func selectViewController(viewController: UIViewController)
 }

ChildProcceedPressedDelegate needs to be conformed in your parent controller

In selectViewController you need to pass the reference of your target controller from your child controller, which you can do by storing it somewhere and passing it. 

internal func selectViewController(viewController: UIViewController) {
    moveTo(viewController: viewController, animated: true)
}

In selectChildControllerAtIndex you just need to pass the index of your target controller:

func selectChildControllerAtIndex( toIndex: Int!) {
    self.moveToViewController(at: index, animated: true)
}

func moveToViewController(at index: Int, animated: Bool) :

It works same as above method but in this you can pass if you want to animate to your target controller or not. Use delegate: selectChildControllerAtIndex

func moveTo(viewController: UIViewController)

It works by passing your target child controller reference and it will animate to your target controller. by delegate: selectViewController

func moveTo(viewController: UIViewController, animated: Bool)

It works by passing your target child controller reference and it will animate as per your choice to your target controller. by delegate: selectViewController

Upvotes: 1

titan
titan

Reputation: 522

The method is pretty straight forward, but you need to call it in your Home(parent View Controller)

In your Child2 view controller class, write the code as below

//after some process done here

let parentViewController = self.parent! as ParentViewController

parentViewController.moveToViewController(at: 0) //Assume your child1 view controller is on index 0

Upvotes: 8

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