ios tabbarcontroller使用

1、创建一个tabbarctrl

添加的组件带着两个界面

如果添加新的界面可以添加viewctrl 组件

本文使用代码实现所以不需要添加relationship segue。删除连接
如果添加新页面直接添加一个viewctrl组件即可。为每个viewctrl添加一个tabbaritem

2、为组件添加控制类

在项目中右键创建控制类


打开组件的属性界面，为组件绑定控制类，在class中添加相应的控制类

3、在tabbarctrl中初始化各界面

import UIKit

class HomePageBarCtrl: UITabBarController {

    override func viewDidLoad() {
        super.viewDidLoad()
		
		// 设置选中时的颜色
        self.tabBar.tintColor = UIColor.orange
        
        
        // 实例化控制类
        let xqtCtrl = XqtViewCtrl()
        let jobCtrl = JobViewCtrl()
        let learnCtrl = LearnClassViewCtrl()
        let campusCtrl = CampusCircleViewCtrl()
        let groupCtrl = GroupBuyingViewCtrl()
        
        // 为tabbaritem 添加图片和title
        xqtCtrl.tabBarItem.image = UIImage(named: "学情图")
        xqtCtrl.tabBarItem.title = "学情图"
        
        jobCtrl.tabBarItem.image = UIImage(named: "作业")
        jobCtrl.tabBarItem.title = "作业"
        
        learnCtrl.tabBarItem.image = UIImage(named: "直播")
        learnCtrl.tabBarItem.title = "学习课堂"

        campusCtrl.tabBarItem.image = UIImage(named: "校园圈")
        campusCtrl.tabBarItem.title = "校园圈"
        
        groupCtrl.tabBarItem.image = UIImage(named: "团购")
        groupCtrl.tabBarItem.title = "一起团购"
        
        // 将各界面添加到控制器中
        addChildViewController(xqtCtrl)
        addChildViewController(jobCtrl)
        addChildViewController(learnCtrl)
        addChildViewController(campusCtrl)
        addChildViewController(groupCtrl)
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
}

4、设计每个界面

这里贴出其中一个界面

import UIKit

class JobViewCtrl: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        self.tabBarItem.title = "作业"
        self.tabBarItem.image = UIImage(named: "作业")
        self.view.backgroundColor = UIColor.purple
    }
	// 切换到该界面时事件
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
   		// 添加角标
        self.tabBarItem.badgeValue = "9"
    }
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
}

结果：