ios - 如何在 View Controller 上获取导航栏？

Question

我有三个 View Controller A、B、C。我有连接到A View Controller 的导航 Controller 。在A 我有一些按钮，我已将按钮 segue 附加到 B View Controller 。单击按钮我转到 B View Controller 。在 B View Controller 上单击 TableView 项时我有 UITableView 我正在启动 C View Controller 。下面是该代码

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    if(indexPath.row==0)
    {
        NSLog(@"first cell");
        UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle: nil];
        UIViewController * vc = [storyboard instantiateViewControllerWithIdentifier:@"BusinessCard"];
        [self presentViewController:vc animated:YES completion:nil];

    }
    else if(indexPath.row==1)
    {
         NSLog(@"second cell");


    }
    else if(indexPath.row==2)
    {
         NSLog(@"third cell");

    }

}

但是在 C View Controller 上，导航栏没有出现。我认为 C View Controller 没有链接到导航 Controller 。

Answer 1

您使用navigationController push 方法在C viewController 中显示导航栏

试试这段代码:

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle: nil];
        UIViewController * vc = [storyboard instantiateViewControllerWithIdentifier:@"BusinessCard"];
        [self.navigationController pushViewController:vc animated:YES];