[英]How to get a uinavigation bar back button to return to anthother view controller
我将如何让UINavigation控制器不导航到上一个视图,而是导航到之前的视图。 基本上,我希望它跳回2个位置,而不是默认位置。
我敢肯定这是非常规的,但是我现在只需要这样做。
self.navigationItem.backBarButtonItem =
[[[UIBarButtonItem alloc] initWithTitle:@"Back"
style:UIBarButtonItemStyleBordered
target:nil
action:nil] autorelease];
谢谢你的帮助。
组:
self.navigationItem.backBarButtonItem = [[[UIBarButtonItem alloc] initWithTitle:@"Back" style:UIBarButtonItemStyleBordered target:self action:@selector(goBack)] autorelease];
然后创建一个方法-goBack
-(void)goBack
{
UIViewController *ctrl = [self.navigationController.viewControllers objectAtIndex:self.navigationController.viewControllers.count - 2];
[self.navigationController popToViewController:ctrl animated:YES];
}
将目标添加到添加的按钮
然后使用以下代码返回1个以上的viewController
//Get the view controller that is 2 step behind
UIViewController *controller = [nav.viewControllers objectAtIndex:nav.viewControllers.count - 2];
//Go to that controller
[nav popToViewController:controller animated:YES];
self.navigationItem.backBarButtonItem = [[[UIBarButtonItem alloc] initWithTitle:@"Back" style:UIBarButtonItemStyleBordered target:self action:@selector(youractonEvent:] autorelease];
如果您不想依赖数组的索引,则可以执行以下操作:
MyController * aMyController = nil ;
for (int i=0; i<[[self.navigationController viewControllers] count]; i++)
{
NSLog(@"%@",[[self.navigationController viewControllers] objectAtIndex:i]);
if ([[[self.navigationController viewControllers] objectAtIndex:i] isKindOfClass:[MyController class]])
{
aMyController = [[self.navigationController viewControllers] objectAtIndex:i];
}
}
[self.navigationController popToViewController:aMyController animated:YES];
如果NavigationController中有三个视图控制器,并且当前正在查看第3个视图控制器,并且您想跳到第1个视图控制器。
尝试这个。 这将使您浏览两次。
[self.navigationController popToViewController:[[self.navigationController viewControllers] objectAtIndex:0] animated:YES];
设置适当的值而不是0。
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