SwiftUI和UIKit简单融合

一：将UIKit 中UIViewController融入SwiftUI

建立中转层

1），创建SwiftUI文件，引入UIViewControllerRepresentable协议

import SwiftUI
import UIKit
struct MainViewUI: UIViewControllerRepresentable{
}

2），设置controller类型，一般都是继承UIViewController

import SwiftUI
import UIKit
struct MainViewUI: UIViewControllerRepresentable{

       typealias UIViewControllerType = UIViewController

}   

3），实现两个协议
一：使UIKit的controller映射到SwiftUI
二：controller更新后需要做的操作

import SwiftUI
import UIKit
struct MainViewUI: UIViewControllerRepresentable{

func makeUIViewController(context: Context) -> UIViewController {
    let VC = UIKitVC()
    return VC
}

func updateUIViewController(_ vc: UIViewController, context: Context) {
    
   
}

typealias UIViewControllerType = UIViewController

}

使用

NavigationLink("Show UIKit VC", destination: MainViewUI())

注：UIKit的controller代码，即UIKitVC

import UIKit
class UIKitVC: UIViewController ,UITableViewDelegate,UITableViewDataSource{

override func viewDidLoad() {
    super.viewDidLoad()
    
    let label = UILabel.init(frame: CGRect.init(x: 0, y: 0, width: 200, height: 30))
    label.text = "这是UIKit中的视图"
    self.view.addSubview(label)
    //顶部88,底部83
    let tabView = UITableView.init(frame: CGRect.init(x: 0, y: 30, width: UIScreen.main.bounds.size.width, height: UIScreen.main.bounds.size.height-230))
    self.view.addSubview(tabView)
    tabView.delegate = self
    tabView.dataSource = self
    
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return 10
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    var cell = tableView.dequeueReusableCell(withIdentifier: "cell")
    if cell == nil {
        cell = UITableViewCell.init(style: .subtitle, reuseIdentifier: "cell")
    }
    cell?.textLabel?.text = "标题"
    cell?.detailTextLabel?.text = "小标题"
    cell?.imageView?.image = UIImage.init(named: "menu")
    return cell!
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    tableView.deselectRow(at: indexPath, animated: true)
}

}

截屏2021-02-12 15.47.47.png

二：使用UIKit中的view

大致方式和Controller相同，只是引入协议不同，此处引入UIViewRepresentable协议

建立中转层

import SwiftUI

struct ShowUIKitView :UIViewRepresentable{
func makeUIView(context: Context) -> UIView {
    let contentView = UIKitView.init(frame: CGRect.init(x: 50, y: 50, width: 200, height: 200))
    return contentView
}

func updateUIView(_ uiView: UIView, context: Context) {
    
}

typealias UIViewType = UIView


}

使用方式

在SwiftUI中调用

ShowUIKitView()
        .padding(.leading,20)
        .padding(.top,50)

其余当作SwiftUI控件正常使用

注：UIKit中view的代码

import UIKit

class UIKitView: UIView {

override init(frame: CGRect) {
    super.init(frame: frame)
    
    let imgV = UIImageView.init(frame: CGRect.init(x: 0, y: 0, width: 50, height: 50))
    imgV.image = UIImage.init(named: "menu")
    self.addSubview(imgV)
    imgV.layer.cornerRadius = 6
    imgV.layer.masksToBounds = true
    let label = UILabel.init(frame: CGRect.init(x: 50, y: 0, width: 100, height: 60))
    label.numberOfLines = 0
    label.text = "这是UIKit中的视图"
    self.addSubview(label)
}

required init?(coder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
}

}

截屏2021-02-12 15.59.49.png

三：UIKit使用SwiftUI

UIHostingController承载SwiftUI中的view

    let vc = MainUIView.init()

    let swiftUIVC = UIHostingController.init(rootView: vc)

    swiftUIVC.hidesBottomBarWhenPushed = true
    
    self.navigationController?.pushViewController(swiftUIVC, animated: true)