Forked from illescasDaniel/SlideAnimationTabBarController.swift
Created
April 11, 2022 14:03
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[Updated to Swift 4] - UITabBarController slide animation. Slide left and right when tabs are selected. Based on code from StackOverflow
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| func tabBarController(_ tabBarController: UITabBarController, shouldSelect viewController: UIViewController) -> Bool { | |
| if let fromView = tabBarController.selectedViewController?.view, | |
| let toView = viewController.view, fromView != toView, | |
| let controllerIndex = self.viewControllers?.firstIndex(of: viewController) { | |
| let viewSize = fromView.frame | |
| let scrollRight = controllerIndex > tabBarController.selectedIndex | |
| if fromView.superview?.subviews.contains(toView) == true { return false } | |
| fromView.superview?.addSubview(toView) | |
| let screenWidth = UIScreen.main.bounds.size.width | |
| toView.frame = CGRect(x: (scrollRight ? screenWidth : -screenWidth), y: viewSize.origin.y, width: screenWidth, height: viewSize.size.height) | |
| UIView.animate(withDuration: 0.3, delay: 0, usingSpringWithDamping: 0.87, initialSpringVelocity: 1, options: [.curveEaseOut, .preferredFramesPerSecond60], animations: { | |
| fromView.frame = CGRect(x: (scrollRight ? -screenWidth : screenWidth), y: viewSize.origin.y, width: screenWidth, height: viewSize.size.height) | |
| toView.frame = CGRect(x: 0, y: viewSize.origin.y, width: screenWidth, height: viewSize.size.height) | |
| }, completion: { finished in | |
| if finished { | |
| fromView.removeFromSuperview() | |
| tabBarController.selectedIndex = controllerIndex | |
| } | |
| }) | |
| return true | |
| } | |
| return false | |
| } |
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