我用代码完成这个任务:
NSArray *viewControllersFromStack = [self.navigationController viewControllers];
NSMutableArray *viewControllersFromStackMutable = [NSMutableArray arrayWithArray:viewControllersFromStack];
NSMutableArray *viewControllersToRemove = [[NSMutableArray alloc]init];
for (UIViewController *currentVC in viewControllersFromStack)
{
if ([currentVC isKindOfClass:[TalksViewController class]])
{
[viewControllersToRemove addObject:currentVC];
if (viewControllersToRemove.count == 2)
{
UIViewController *oneVCtoRemove = [viewControllersToRemove objectAtIndex:0];
[viewControllersFromStackMutable removeObject:oneVCtoRemove];
[self.navigationController setViewControllers:viewControllersFromStackMutable];
}
}
}
问题是我在导航栏中引用了已删除的视图控制器。如何解决?