尝试在 NavigationController 中推送多个 UIViewController 时出现 iOS8 问题

Question

我有 6 个 UIViewControllers 与带有标识符的推送 segues 连接，并在我的应用程序中使用此方法“跳转”到所需的 UIViewController 以堆叠 ViewControllers：

- (void) JumpTo6 {
UINavigationController *nav = self.navigationController;
UIViewController *a =[self.storyboard instantiateViewControllerWithIdentifier:@"2"];
[nav pushViewController:a animated:NO];
UIViewController *b =[self.storyboard instantiateViewControllerWithIdentifier:@"3"];
[nav pushViewController:b animated:NO];
UIViewController *c =[self.storyboard instantiateViewControllerWithIdentifier:@"4"];
[nav pushViewController:c animated:NO];
UIViewController *d =[self.storyboard instantiateViewControllerWithIdentifier:@"5"];
[nav pushViewController:d animated:NO];
UIViewController *e =[self.storyboard instantiateViewControllerWithIdentifier:@"6"];
[nav pushViewController:e animated:YES];

使用 iOS7 时一切正常。我会触发这个方法，假设我在UIViewController 1 上，系统将每隔UIViewController 堆叠一次，直到 UI VC 6，UIViewController 6 会呈现动画。

但是在 iOS8 上出现了奇怪的行为。系统短暂显示UIViewcontroller 5，然后转到UIViewcontroller 6。这是我不想要的。

总结一下：

iOS 7：1 -----> 6 - 可取

iOS 8：1 -----> 5（在短时间内）----> 6 - 不受欢迎

我的问题是如何使用 iOS 8 达到理想的效果。Ty！

Answer 1

使用方法：

- (void)setViewControllers:(NSArray *)viewControllers
              animated:(BOOL)animated

一次设置所有控制器，只显示最后一个。

在你的情况下：

- (void) JumpTo6 {
  UINavigationController *nav = self.navigationController;
  UIViewController *a = [self.storyboard instantiateViewControllerWithIdentifier:@"2"];
  UIViewController *b = [self.storyboard instantiateViewControllerWithIdentifier:@"3"];
  UIViewController *c = [self.storyboard instantiateViewControllerWithIdentifier:@"4"];
  UIViewController *d = [self.storyboard instantiateViewControllerWithIdentifier:@"5"];
  UIViewController *e = [self.storyboard instantiateViewControllerWithIdentifier:@"6"];
  NSArray *viewControllers = nav.viewControllers;
  NSArray *newViewControllers = [NSArray arrayWithObjects:a, b, c, d, e, nil];
  [nav setViewControllers:[viewControllers arrayByAddingObjectsFromArray:newViewControllers] animated:YES];
}