ios - 单击 UITabbarItem 打开 UIViewController

Question

我创建了一个带有 UITabbar 的 UIViewController。

我没有使用 UITabbarController，因为我希望 UITabbar 位于屏幕顶部。

单击 tab1 时，我想显示 Controller 1，单击 tab2 时，我想显示 Controller 2。我不想隐藏标签栏。我想在标签栏下方显示 Controller 。

@interface MTLeaderFactoViewController () <UITabBarDelegate>
@property (weak, nonatomic) IBOutlet UITabBar *tabBar;
@end

@implementation MTLeaderFactoViewController

- (void)viewDidLoad {
    [super viewDidLoad];
}

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
}

- (void)viewWillDisappear:(BOOL)animated {
    [super viewWillDisappear:animated];
}

- (void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item {
    if (item.tag == 0) {
        NSLog(@"item tag 0");
    } else {
        NSLog(@"item tag 1");
    }
}
@end

我的问题:

1) 即使在使用 UITabbarDelegate 之后，didSelectItem 方法也没有被触发

2) 单击按钮时显示 Controller 的最优雅方式是什么？我不想使用 segue，因为所有 Controller 都在不同的 Storyboard中。现在，我打算做

Controller1 *fp = [Controller1 controllerStoryboard:STORYBOARD_COURSE];
[self addChildViewController:fp];
[self.view addSubview:fp.view];
[fp didMoveToParentViewController:self];

编辑 1:

    Controller1 *fp = [Controller1 controllerStoryboard:STORYBOARD_COURSE];
    [self addChildViewController:fp];
    [self.view addSubview:fp.view];
    [fp didMoveToParentViewController:self];

试过了，但它隐藏了标签栏。我想利用标签栏下方的空间来显示 Controller

Answer 1

你需要做的是有一个 basecontroller 类，它将包含一个标签栏(以编程方式创建)然后你可以在这里获得所需的输出我创建的示例 baseController，

import UIKit

class BaseViewController: UIViewController,UITabBarDelegate{

    override func viewDidLoad() {
        super.viewDidLoad()

        let myTabBar = UITabBar()
        myTabBar.frame = CGRect(x: 0, y: 60, width:self.view.frame.size.width, height: 50)

        let one = UITabBarItem()
        one.title = "one"
        one.tag = 1
        let two = UITabBarItem()
        two.title = "two"
        two.tag = 2
        myTabBar.setItems([one,two], animated: false)
        self.view.addSubview(myTabBar)
        myTabBar.delegate = self

    }


    func tabBar(_ tabBar: UITabBar, didSelect item: UITabBarItem) {
        switch item.tag  {
        case 1:
            let controller = storyboard?.instantiateViewController(withIdentifier: "SecondViewController")
            addChildViewController(controller!)
            view.addSubview((controller?.view)!)
            controller?.didMove(toParentViewController: self)
            break
        case 2:
            let controller = storyboard?.instantiateViewController(withIdentifier: "ViewController")
            addChildViewController(controller!)
            view.addSubview((controller?.view)!)
            controller?.didMove(toParentViewController: self)
            break
        default:
            break
        }

    }

}

View Controller 类:

import UIKit

class ViewController: BaseViewController {


    override func viewDidLoad() {
        super.viewDidLoad()
                // Do any additional setup after loading the view, typically from a nib.
    }


}

第二 View Controller :

import UIKit

class SecondViewController: BaseViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
    }



}