ios - 如何使选项卡栏自定义动画仅发生在某个 View Controller 上？

Question

我有一个在选择选项卡时的自定义动画，但我希望该动画仅在单击某个选项卡时出现。我猜测这与 toView 的实例化有关。错误http://puu.sh/n5VuA/c3e886957e.png

class TransitioningObject: NSObject, UIViewControllerAnimatedTransitioning {

func animateTransition(transitionContext: UIViewControllerContextTransitioning) {
// Get the "from"nd "to" views
let fromView : UIView = transitionContext.viewForKey(UITransitionContextFromViewKey)!
let toView : UIView = transitionContext.viewForKey(UITransitionContextToViewKey)!


transitionContext.containerView()!.addSubview(fromView)
transitionContext.containerView()!.addSubview(toView)

//The "to" view with start "off screen" and slide left pushing the "from" view "off screen"
toView.frame = CGRectMake(toView.frame.width, 0, toView.frame.width, toView.frame.height)
let fromNewFrame = CGRectMake(-1 * fromView.frame.width, 0, fromView.frame.width, fromView.frame.height)

UIView.animateWithDuration(transitionDuration(transitionContext), animations: { () -> Void in
toView.frame = CGRectMake(0, 0, 320, 560)
fromView.frame = fromNewFrame
}) { (Bool) -> Void in

transitionContext.completeTransition(true)
        }

}

func transitionDuration(transitionContext: UIViewControllerContextTransitioning?) -> NSTimeInterval {
return 0.35
    }
}

这是 View Controller 代码

override func viewDidLoad() {
    super.viewDidLoad()

    let animatedTransitioningObject = TransitioningObject()
    animatedTransitioningObject.animateTransition(UIViewControllerContextTransitionin) //I get an error here
    // Do any additional setup after loading the view.
}

Answer 1

- (void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext
{
  UIViewController* toViewController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
  UIViewController* fromViewController = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
  [[transitionContext containerView] addSubview:toViewController.view];
  toViewController.view.alpha = 0;

  [UIView animateWithDuration:[self transitionDuration:transitionContext] animations:^{
    fromViewController.view.transform = CGAffineTransformMakeScale(0.1, 0.1);
    toViewController.view.alpha = 1;
  } completion:^(BOOL finished) {
      fromViewController.view.transform = CGAffineTransformIdentity;
      [transitionContext completeTransition:![transitionContext transitionWasCancelled]];

}];

}

你的动画函数应该是什么样子。

此外，如果您想要一个为您执行此操作的 Pod，我建议您查看此 Pod

https://github.com/Ramotion/animated-tab-bar