我有两个UITableViewControllers，当我在第一个UITableViewController上单击下一个时，第二个UITableViewController被推送到导航堆栈并像平常一样动画转换。我想这样做，当我下一步，只有视图动画，导航栏没有（保持不变）。我已经非常接近使用以下代码执行此操作：
- (void) viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
CATransition *navTransition = [CATransition animation];
navTransition.duration = .5;
navTransition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
navTransition.type = kCATransitionPush;
navTransition.subtype = kCATransitionPush;
[self.navigationController.navigationBar.layer addAnimation:navTransition forKey:nil];
}
我把这个代码，我也这样做，所以两个导航栏上的标题和按钮在每个UITableViewController中完全相同。它几乎可以工作，问题是，动画发生时导航栏会闪烁。反正有没有让它不闪烁，或者有没有其他好方法可以防止导航栏的动画发生（即禁用图层上的动画或其他东西）？
更新：任何人有任何其他想法？仍然在努力解决这个问题。
这就是我提出的。这是序列中第一个viewController的代码：
- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{
if (viewController == self)
{
if (self.isInitialized)
{
CATransition *navigationBarAnimation = [CATransition animation];
navigationBarAnimation.duration = 1.5;
navigationBarAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn];;
navigationBarAnimation.type = kCATransitionFade;
navigationBarAnimation.subtype = kCATransitionFade;
navigationBarAnimation.removedOnCompletion = YES;
[self.navigationController.navigationBar.layer addAnimation:navigationBarAnimation forKey:nil];
}
else
{
self.isInitialized = YES;
}
}
}
- (void)navigationController:(UINavigationController *)navigationController didShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{
if (viewController == self)
{
if (self.isInitialized)
{
[self.navigationController.navigationBar.layer removeAllAnimations];
}
}
}
这是第二个视图控制器的代码：
- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{
if (viewController == self)
{
if (!self.isInitialized)
{
CATransition *navigationBarAnimation = [CATransition animation];
navigationBarAnimation.duration = 1.5;
navigationBarAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn];;
navigationBarAnimation.type = kCATransitionFade;
navigationBarAnimation.subtype = kCATransitionFade;
navigationBarAnimation.removedOnCompletion = YES;
[self.navigationController.navigationBar.layer addAnimation:navigationBarAnimation forKey:nil];
self.isInitialized = YES;
}
}
}
- (void)navigationController:(UINavigationController *)navigationController didShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{
if (viewController == self)
{
if (self.isInitialized)
{
[self.navigationController.navigationBar.layer removeAllAnimations];
}
}
}
您必须使用UINavigationController委托方法来确定何时显示UIViewController。然后对于每个UIViewController，需要制作一个BOOL isInitialized属性，这样它可以帮助你确定UIViewController何时被推入堆栈，或者当它被显示因为你推回下一个UIViewController。
这可能不是最好的答案/想法，但您可以在动画期间屏蔽UINavigationBar。
创建一个UINavigationBar，其外观与当前UNavigationBar在转换发生之前将其添加到keyWindow的方式完全相同，然后在完成后将其删除。这基本上只涵盖UINavigationBar并隐藏其动画。
迅速
这是swift的解决方案
var isInitialized = false
你的FirstViewController：
func navigationController(_ navigationController: UINavigationController, willShowViewController viewController: UIViewController, animated: Bool) {
if viewController == self {
if self.isInitialized {
var navigationBarAnimation = CATransition()
navigationBarAnimation.duration = 1.5
navigationBarAnimation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseIn)
navigationBarAnimation.type = kCATransitionFade
navigationBarAnimation.subtype = kCATransitionFade
navigationBarAnimation.removedOnCompletion = true
self.navigationController?.navigationBar?.layer?.addAnimation(navigationBarAnimation, forKey: nil)
}
else
{
self.isInitialized = true;
}
}
}
func navigationController(_ navigationController: UINavigationController, didShowViewController viewController: UIViewController, animated: Bool) {
if viewController == self {
if self.isInitialized {
self.navigationController?.navigationBar?.layer?.removeAllAnimations()
}
}
}
你的SecondViewController：
func navigationController(_ navigationController: UINavigationController, willShowViewController viewController: UIViewController, animated: Bool) {
if viewController == self {
if !self.isInitialized {
var navigationBarAnimation = CATransition()
navigationBarAnimation.duration = 1.5
navigationBarAnimation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseIn)
navigationBarAnimation.type = kCATransitionFade
navigationBarAnimation.subtype = kCATransitionFade
navigationBarAnimation.removedOnCompletion = true
self.navigationController?.navigationBar?.layer?.addAnimation(navigationBarAnimation, forKey: nil)
self.isInitialized = true;
}
}
}
func navigationController(_ navigationController: UINavigationController, didShowViewController viewController: UIViewController, animated: Bool) {
if viewController == self {
if self.isInitialized {
self.navigationController?.navigationBar?.layer?.removeAllAnimations()
}
}
}