iOS之Swift组件化方案（一）

参考资料：iOS组件化探索

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//
//  ViewController.swift
//  SwiftDemo
//
//  Created by Leo on 2020/1/3.
//  Copyright © 2020 Leo. All rights reserved.
//

import UIKit

class ViewController: UIViewController {
    
    override func viewDidLoad() {
        super.viewDidLoad()
    }
    override func touchesBegan(_ touches: Set, with event: UIEvent?) {
        //url方案
        //Mediator.sharedInstance.openURL(url: "sd://goToDetail", param: "xx" as AnyObject)
        // runtime方案
        let vc = Mediator.sharedInstance.getDetailViewController(nextID: "xx")
        self.navigationController?.pushViewController(vc!, animated: true)
    }
}

//
//  NextViewController.swift
//  SwiftDemo
//
//  Created by Leo on 2020/6/22.
//  Copyright © 2020 Leo. All rights reserved.
//

import UIKit

class NextViewController: UIViewController {

    var nextID:String?
    
    override func viewDidLoad() {
        super.viewDidLoad()
    }
    
    convenience init(nextID:String) {
        self.init()
        self.nextID = nextID
    }
}

//
//  Mediator.swift
//  SwiftDemo
//
//  Created by Leo on 2020/6/22.
//  Copyright © 2020 Leo. All rights reserved.
//

import UIKit

let kDetailComponent:String = "DetailComponent"

class Mediator: NSObject {
    static let sharedInstance = Mediator()
    private var registerCache:Dictionary()> = [:]
    private override init() {
        super.init()
    }
    // URL方案
    func register(url:String,callBack:@escaping (AnyObject)->()){
        registerCache[url] = callBack
    }
    
    func openURL(url:String,param:AnyObject){
        let callBack = registerCache[url]
        if let blk = callBack {
            blk(param);
        }
    }
    
    // 运行时方案
    @objc func getDetailViewController(nextID:String) -> UIViewController?{
        if let m = method(cls: kDetailComponent, selName: "detailComponent_getDetailViewControllerWithNextID:"){
            return m(nextID) as? UIViewController
        }
        return nil
    }
    
    func method(cls:String,selName:String) -> ((Any?) -> Any)?{
        let selector = NSSelectorFromString(selName)
        let namespace = Bundle.main.infoDictionary!["CFBundleExecutable"] as! String
        // 拼接类名的完整格式,即namespace.类名,vcName即控制器的类名
        let clsName = namespace + "." + "DetailComponent"
        return extractMethodFrom(owner: NSClassFromString(clsName)!, selector: selector)
    }
    
    func extractMethodFrom(owner: AnyObject, selector: Selector) -> ((Any?) -> Any)? {
        let method: Method?
        if owner is AnyClass {
           method = class_getClassMethod(owner as? AnyClass, selector)
        } else {
           print(type(of: owner))
           method = class_getInstanceMethod(type(of: owner), selector)
        }
        if let one = method {
           let implementation = method_getImplementation(one)
           typealias Function = @convention(c) (AnyObject, Selector, Any?) -> Any
           let function = unsafeBitCast(implementation, to: Function.self)
           return { userinfo in function(owner, selector, userinfo) }
        } else {
           return nil
        }
    }
}

//
//  DetailComponent.swift
//  SwiftDemo
//
//  Created by Leo on 2020/6/22.
//  Copyright © 2020 Leo. All rights reserved.
//

import UIKit

class DetailComponent: NSObject {
    
    // URL方案
    static func initComponent() -> Void{
        Mediator.sharedInstance.register(url: "sd://goToDetail") { (obj) in
            let str = obj as! String
            let vc = NextViewController.init(nextID: str)
            (UIApplication.shared.keyWindow?.rootViewController as? UINavigationController)?.pushViewController(vc, animated: true)
        }
    }
    
    // 运行时方案
    @objc(detailComponent_getDetailViewControllerWithNextID:)
    static func detailComponent_getDetailViewController(id:String) -> UIViewController{
        let vc = NextViewController.init(nextID: id)
        return vc
    }
    
    func get_class_copyMethodList() -> [String]{
        var outCount:UInt32
        outCount = 0
        let methods:UnsafeMutablePointer! =  class_copyMethodList(self.classForCoder, &outCount)
        let count:Int = Int(outCount);
        var names:[String] = [String]()
        for i in 0...(count-1) {
            
            let aMet: objc_property_t = methods[i]
            
            if let methodName:String = String(utf8String: property_getName(aMet)){
                names.append(methodName)
            }
        }
        return names
    }
    
}

//
//  AppDelegate.swift
//  SwiftDemo
//
//  Created by Leo on 2020/1/3.
//  Copyright © 2020 Leo. All rights reserved.
//

import UIKit

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

     var isLandscape = false

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        // URL方案需要在程序启动时 注册相应方法以及闭包
        DetailComponent.initComponent()
        return true
    }
    
    func application(_ application: UIApplication, supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask {
        if isLandscape == true{
            return [.portrait,.landscapeLeft,.landscapeRight]
        }else{
            return .portrait
        }
    }

    // MARK: UISceneSession Lifecycle

    func application(_ application: UIApplication, configurationForConnecting connectingSceneSession: UISceneSession, options: UIScene.ConnectionOptions) -> UISceneConfiguration {
        // Called when a new scene session is being created.
        // Use this method to select a configuration to create the new scene with.
        return UISceneConfiguration(name: "Default Configuration", sessionRole: connectingSceneSession.role)
    }

    func application(_ application: UIApplication, didDiscardSceneSessions sceneSessions: Set) {
        // Called when the user discards a scene session.
        // If any sessions were discarded while the application was not running, this will be called shortly after application:didFinishLaunchingWithOptions.
        // Use this method to release any resources that were specific to the discarded scenes, as they will not return.
    }
}