使用PushViewController时不显示选项卡

问题描述

我正在尝试使用以下代码来显示tabbarcontroller

I'm trying to use the following code to display a tabbarcontroller

UITabBarController *tc = [[self storyboard] instantiateViewControllerWithIdentifier:@"tabbarcontroller"];
[self.navigationController pushViewController:tc animated:YES];

它确实加载了视图，我可以告诉它要将其默认设置为哪个选项卡.问题是选项卡不显示.根据我的阅读，我认为这与将Tab控制器放入导航控制器有关，但是我找不到任何解决方案.

It does load the view, and I can tell it which of the tabs I want it to default to. The problem is the tabs don't show. From what I've read I gather it has something to do with putting the tab controller inside of the navigation controller, but I couldn't find any solutions.

推荐答案

如果使用Storyboard，则使用pushViewController方法是一个不好的选择(如果可行).您必须插入" segue ".进入情节提要，然后在按住的同时按Ctrl键，单击主控制器(必须打开tabViewController)，然后释放对tabBarController的单击.

If you use Storyboard, use pushViewController method is a bad choice (also if it work). You have to insert a "segue".Go in the storyboard and while press ctrl button, click on the main controller (which must open the tabViewController) and then release the click on the tabBarController.

现在您拥有了segue.单击出现的圆圈，然后为此标识选择一个标识符，例如: MainToTab .

Now you have the segue. Click on the circle which appears and choose an identifier for this segue, for example: MainToTab .

现在，在您的方法中，您只需调用:

Now in your method, you have just to call:

[self performSegueWithIdentifier:@"MainToTab" sender:self];

此外，如果要(通过segue)管理目标控制器上的属性，则可以实现此方法:

Moreover, if you want manage the property on the destination controller (by segue), you can implement this method:

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {

    if ([segue.identifier isEqualToString:@"MainToTab"]) {
        UITabViewController *tb = (UITabViewController *)segue.destinationViewController;
        //set the properties...
    }

}

启动前一种方法时会自动调用此方法.

This method is called automatically when you launch the previous method.

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