我的第二个观点是BController * bview。 现在在这个视图中有1个后退按钮
点击后退按钮
-(IBAction)done:(id)sender
{
AController *aview= [[AController alloc] initWithNibName:@"AController" bundle:[NSBundle mainBundle]];
NSArray *array = [self.navigationController popToViewController: aview animated:YES];
}
AController * aview只不过是我的第一个视图,或者你可以说第一个视图
但是点击后退按钮我得到了异常
**由于未捕获的异常'NSInternalInconsistencyException'而终止应用程序,原因:'尝试弹出到不存在的视图控制器。 2010-03-18 15:53:05.948 IChitMe [5072:207] Stack :( 820145437, 837578260, 819694387, 814928571, 862794500, 862794216, 54911, 819902607, 861951876, 862404412, 819902607, 861951876, 861951724, 861951668, 861950732, 861953932, 861948160, 861945748, 861927312, 861925524, 858687888, 819893547, 819891231, 858682228, 861592624, 861585968, 10069, 9964 ) 抛出'NSException'实例后调用终止
答案 0 :(得分:24)
使用
[self.navigationController popViewControllerAnimated:YES];
OR
[self.navigationController popToViewController:[self.navigationController.viewControllers objectAtIndex:1] animated:YES];
答案 1 :(得分:6)
navigationController管理UIViewControllers的堆栈。这就像一叠牌。当你调用其中一个pop方法时:
- (NSArray *)popToRootViewControllerAnimated:(BOOL)animated
- (NSArray *)popToViewController:(UIViewController *)viewController animated:(BOOL)animated
- (UIViewController *)popViewControllerAnimated:(BOOL)animated
从顶部删除一些控制器,并显示相应的控制器:
- (NSArray *)popToRootViewControllerAnimated:(BOOL)animated
弹出到第一个(即堆栈中最低的)控制器,它被称为“root”。
- (NSArray *)popToViewController:(UIViewController *)viewController animated:(BOOL)animated
弹出到指定的viewController,注意它应该已经在堆栈中!
- (UIViewController *)popViewControllerAnimated:(BOOL)animated
弹出到前一个控制器(低于当前值)。
因此,如果你想使用pop ...导航控制器的方法显示你的AController * aview它应该已经在navigationController堆栈中 - 这是navigationController的 viewControllers 属性:
@property(nonatomic, copy) NSArray *viewControllers
例如:
aController = [[AController alloc] initWithNibName:@"AController" bundle:[NSBundle mainBundle]];
bController = [[BController alloc] initWithNibName:@"BController" bundle:[NSBundle mainBundle]];
navigationController = [[UINavigationController alloc] initWithRootViewController:aController];
[navigationController pushViewController:bController];
现在显示bController,您可以致电:
[navigationController popToViewController:aController animated:YES];