导航控制器后退功能

Question

我有一个3视图A B C，三个都有一个导航栏。我需要的是当我点击C视图后退按钮我要打开一个视图，但当我回到A时出现问题。在A的导航栏添加C后退按钮。

我试过这个

UIBarButtonItem * back=[[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(move)];

self.navigationItem.leftBarButtonItem=back;

-(void)move
{

    FirstViewController * fvc=[[FirstViewController alloc]init];

    [[self navigationController]pushViewController:fvc animated:NO];


}

请提前帮助我。

Answer 1

View Controller被推入堆栈索引0,1,2，这意味着FirstViewController At 0 index，SecondViewController At 1 index。

所以你可以试试这个

[self.navigationController popToViewController:[[self.navigationController viewControllers] objectAtIndex:0] animated:YES];

0 index适用于您的第一视图控制器。

试试这个对你有帮助。

Answer 2

UIBarButtonItem * back=[[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(move)];

self.navigationItem.leftBarButtonItem=back;

如果你想推进另一个视图控制器，那么使用这个

-(void)move
{
     FirstViewController *fvc = [[FirstViewController alloc] initWithNibName:@"FirstViewController" bundle:nil];
     [self.navigationController pushViewController:fvc animated:YES];

}

如果您想返回之前的屏幕，请使用此代码

-(void)move
{
   [self.navigationController popViewControllerAnimated:YES];
}

Answer 3

我认为你应该使用

[self.navigationController popToViewController:[[self.navigationController viewControllers] objectAtIndex:VCIndex] animated:YES]

Answer 4

这一个

 -(void)Back
 {
        NSArray *array1 = [self.navigationController viewControllers];
        [self.navigationController popToViewController:[array1 objectAtIndex:1] animated:YES];
 //  objectAtIndex put your as requirement like 0,1,2 etc..

  }   

Answer 5

尝试

-(void)move
 {

    [navigationController popToRootViewControllerAnimated:YES];

 }