朋也的博客 » 首页 » 文章

swift4 往视图控制器里添加视图控制器（往UIViewController里添加UIViewController）

作者：朋也
日期：2018-06-13
类别：swift学习笔记(纯代码) 

版权声明：自由转载-非商用-非衍生-保持署名（创意共享3.0许可证）

直接上图

接着上一篇博客代码开发的，地址：https://atjiu.github.io/2018/06/13/swift-tablayout-xlpagertabstrip/

将 ViewController 里的 TabLayout 相关代码抽出来

新建一个类 TabLayoutViewController.swift

import UIKit
import XLPagerTabStrip

class TabLayoutViewController: 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()
    }

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

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

}

在 ViewController 里添加一个 UIImageView 和初始化 TabLayoutViewController，然后将图片视图添加到ViewController的子视图里

TabLayoutViewController是一个控制器，它的添加方法有些特殊，先用 self.addChildViewController() 方法将控制器添加到当前控制器里，然后再用 self.view.addSubView() 方法把控制器的视图添加到当前控制器的子视图里，代码如下

import UIKit
import XLPagerTabStrip
import SnapKit
import Kingfisher

class ViewController: UIViewController {

    let url = "https://www.2ddog.com/wp-content/uploads/2018/04/cfcd208495d565ef66e7dff9f98764da.jpg"

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

        let image = UIImageView()
        image.contentMode = .scaleAspectFill
        self.view.addSubview(image)

        let tabLayout = TabLayoutViewController()
        //将控制器加入到当前控制器里
        self.addChildViewController(tabLayout)
        //将控制器的视图加入到当前控制器的子视图中
        self.view.addSubview(tabLayout.view)

        // 添加布局
        image.snp.makeConstraints { (make) in
            make.top.left.right.equalTo(0)
            make.height.equalTo(200)
        }

        tabLayout.view.snp.makeConstraints { (make) in
            make.top.equalTo(image.snp.bottom)
            make.left.right.bottom.equalTo(0)
        }

        // 加载网络图片
        image.kf.indicatorType = .activity
        image.kf.setImage(with: URL(string: url))
    }

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

}

运行起来就是上面图片中的效果了，快试试吧

相关文章