swift中的标签栏项目标签问题

Question

我有一个视图控制器，其中标签栏内有标签栏，我有四个标签栏项目。我为每个项目设置了标签。当用户单击任何标签栏项目时，我想打开视图控制器。我使用了标签栏的委托方法来实现这一点。现在，当我单击任何项​​目时，它只会在每个选项卡栏项目上打开第一个视图控制器。我的代码是这样的，

 func tabBar(_ tabBar: UITabBar, didSelect item: UITabBarItem) {
    if stateBtn.tag == 1 {
        let vcName = "StatesViewController"

        let viewController = storyboard!.instantiateViewController(withIdentifier: vcName)
        self.revealViewController().pushFrontViewController(viewController, animated: true)

    } else if bidBtn.tag == 2 {

        let vcName = "FindBidsViewController"

        let viewController = storyboard!.instantiateViewController(withIdentifier: vcName)
        self.revealViewController().pushFrontViewController(viewController, animated: true)

    }else if categoryBtn.tag == 3{

        let vcName = "CategoriesViewController"

        let viewController = storyboard!.instantiateViewController(withIdentifier: vcName)
        self.revealViewController().pushFrontViewController(viewController, animated: true)

    }else{

        let vcName = "RFPSearchViewController"

        let viewController = storyboard!.instantiateViewController(withIdentifier: vcName)
        self.revealViewController().pushFrontViewController(viewController, animated: true)

    }
}

我也将其委托设置为 self。但它只为所有项目打开一个视图控制器。

Answer 1

你正在检查

if stateBtn.tag == 1

这始终为真，因此第一个条件将始终执行。相反，您应该使用

if item.tag == 1 

因为 item 是对点击的标签栏项目的引用。

Answer 2

Try this code to detect which item is clicked.

switch item.tag {
     case 0:
        print("First Item")
     case 1:
        print("Second Item")
     case 2:
        print("Third Item")
     case 3:
        print("Fourth Item")
     default: break
}

Hope this would help you.