直接上图

安装

开源地址:https://github.com/xmartlabs/XLPagerTabStrip

使用 cocoapod 安装

pod 'XLPagerTabStrip'

因为项目中还用到了布局,加载网络图片,所以顺便把布局和加载图片的库也安装一下

pod 'SnapKit'
pod 'Kingfisher'

配置XLPagerTabStrip

引入库 import XLPagerTabStrip

viewDidLoad 方法里添加上默认的配置信息

注意:一定要写在 super.viewDidLoad() 之前,这很重要

self.settings.style.buttonBarItemFont = .systemFont(ofSize: 14)
self.settings.style.buttonBarItemTitleColor = UIColor(red:0.86, green:0.72, blue:0.44, alpha:1.0)
self.settings.style.buttonBarHeight = 40
self.settings.style.buttonBarBackgroundColor = UIColor.white
self.settings.style.buttonBarItemBackgroundColor = UIColor.white
self.settings.style.selectedBarHeight = 2

// 切换Tab时操作
changeCurrentIndexProgressive = { (oldCell: ButtonBarViewCell?, newCell: ButtonBarViewCell?, progressPercentage: CGFloat, changeCurrentIndex: Bool, animated: Bool) -> Void in
    guard changeCurrentIndex == true else { return }

    oldCell?.label.textColor = .black
    newCell?.label.textColor = .orange

    if animated {
        UIView.animate(withDuration: 0.1, animations: { () -> Void in
            newCell?.transform = CGAffineTransform(scaleX: 1.0, y: 1.0)
            oldCell?.transform = CGAffineTransform(scaleX: 0.8, y: 0.8)
        })
    }
    else {
        newCell?.transform = CGAffineTransform(scaleX: 1.0, y: 1.0)
        oldCell?.transform = CGAffineTransform(scaleX: 0.8, y: 0.8)
    }
}

上面的配置可以在开源项目的readme里找到解释,不过根据名字就能知道大概

ViewController 继承 ButtonBarPagerTabStripViewController 然后实现方法 override func viewControllers(for pagerTabStripController: PagerTabStripViewController) -> [UIViewController]

override func viewControllers(for pagerTabStripController: PagerTabStripViewController) -> [UIViewController] {
  return [FirstViewController(), SecondViewController()]
}

再新建两个UIViewController就可以了,名字分别是 FirstViewController SecondViewController 然后运行即可

运行之后效果肯定不是上面图片上那样的,下面来改改效果

加入导航

找到 AppDelegate 类,在 application 方法里加上下面代码

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
  // Override point for customization after application launch.
  let rootVC = UINavigationController(rootViewController: ViewController())
  self.window?.rootViewController = rootVC
  return true
}

然后在 ViewController 里添加一个title, 给个背景色

override func viewDidLoad() {
  // settings.style.....

  super.viewDidLoad()
  self.title = "TabLayout Demo"
  self.view.backgroundColor = .white
  // 去掉 navigation 的磨砂半透明,这样tablayout不会被导航盖掉
  self.navigationController?.navigationBar.isTranslucent = false
}

源码

ViewController.swift

import UIKit
import XLPagerTabStrip

class ViewController: ButtonBarPagerTabStripViewController {

    override func viewDidLoad() {
        self.settings.style.buttonBarItemFont = .systemFont(ofSize: 14)
        self.settings.style.buttonBarItemTitleColor = UIColor(red:0.86, green:0.72, blue:0.44, alpha:1.0)
        self.settings.style.buttonBarHeight = 40
        self.settings.style.buttonBarBackgroundColor = UIColor.white
        self.settings.style.buttonBarItemBackgroundColor = UIColor.white
        self.settings.style.selectedBarHeight = 2

        changeCurrentIndexProgressive = { (oldCell: ButtonBarViewCell?, newCell: ButtonBarViewCell?, progressPercentage: CGFloat, changeCurrentIndex: Bool, animated: Bool) -> Void in
            guard changeCurrentIndex == true else { return }

            oldCell?.label.textColor = .black
            newCell?.label.textColor = .orange

            if animated {
                UIView.animate(withDuration: 0.1, animations: { () -> Void in
                    newCell?.transform = CGAffineTransform(scaleX: 1.0, y: 1.0)
                    oldCell?.transform = CGAffineTransform(scaleX: 0.8, y: 0.8)
                })
            }
            else {
                newCell?.transform = CGAffineTransform(scaleX: 1.0, y: 1.0)
                oldCell?.transform = CGAffineTransform(scaleX: 0.8, y: 0.8)
            }
        }

        super.viewDidLoad()
        self.title = "TabLayout Demo"
        self.view.backgroundColor = .white
        self.navigationController?.navigationBar.isTranslucent = false

    }

    override func viewControllers(for pagerTabStripController: PagerTabStripViewController) -> [UIViewController] {
        return [FirstViewController(), SecondViewController()]
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

}

FirstViewController.swift

import UIKit
import XLPagerTabStrip
import SnapKit

class FirstViewController: UIViewController, IndicatorInfoProvider, UITableViewDataSource, UITableViewDelegate {

    let data = ["Java", "Spring", "Swift", "MySQL", "MongoDB", "Redis"]
    var tableView: UITableView!

    override func viewDidLoad() {
        super.viewDidLoad()

        tableView = UITableView()
        self.view.addSubview(tableView)

        tableView.snp.makeConstraints { (make) in
            make.top.left.right.bottom.equalTo(0)
        }

        self.tableView.dataSource = self
        self.tableView.delegate = self
        self.tableView.register(UITableViewCell.self, forCellReuseIdentifier: "cell")

    }

    func indicatorInfo(for pagerTabStripController: PagerTabStripViewController) -> IndicatorInfo {
        return IndicatorInfo(title: "FirstVC")
    }

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return data.count
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
        cell.textLabel?.text = data[indexPath.row]
        return cell
    }

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

}

SecondViewController.swift

import UIKit
import XLPagerTabStrip
import SnapKit
import Kingfisher

class SecondViewController: UIViewController, IndicatorInfoProvider {

    let url = "https://www.2ddog.com/wp-content/uploads/2018/06/c68907c2431445211c2cdb28d512dd90.jpg"

    override func viewDidLoad() {
        super.viewDidLoad()

        let imageView = UIImageView()
        imageView.contentMode = .scaleAspectFill

        self.view.addSubview(imageView)

        imageView.snp.makeConstraints { (make) in
            make.left.right.top.equalTo(0)
            make.height.equalTo(200)
        }

        imageView.kf.indicatorType = .activity
        imageView.kf.setImage(with: URL(string: url))

    }

    func indicatorInfo(for pagerTabStripController: PagerTabStripViewController) -> IndicatorInfo {
        return IndicatorInfo(title: "SecondVC")
    }

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

}
原文链接: https://tomoya92.github.io/2018/06/13/swift-tablayout-xlpagertabstrip/