Swift开发-组件化开发之AppDelegate分解

现在很多的大型项目基本都是多人协作的,基本都是以组件化开发为主,减少不同开发人员之间的相互影响,小中型项目有没有必须使用呢,有人说没必要,杀鸡焉用牛刀,其实是有必须要的,虽然代码量有增加,但是最起码代码结构更清晰,也利于代码维护,如果去做大型项目也能提早适应,再者也是对编码能力的提升,好处很多啊。

下面从swift开发iOS为例来做个介绍。

AppDelegate是iOS开发中一个很重要的类,很多系统的事件处理都在这个类下,如推送,分享,支付等等,这个类加太多的处理会导致很臃肿,有人建议说可以用分类,这也是一种办法,

分类有一个不好的地方就是会导致代码分散,阅读性会差一些。从设计模式的6大原则来解决问题,可以有其它的解决方案。AppDelegate下相关的代理还是写在其下,AppDelegate只做粘合作用,其它不同的业务需要单独处理,定义到自己的业务类中。

项目中的MCHKit文件夹只做共用代码包,与业务无关,拿到任何项目中都可以拿来直接使用,并不会报错。下面以推送功能为例.

在项目的MCHKit下创建 ModuleManager类,包含一个ModuleManagerDelegate 协议,业务类需要实现ModuleManagerDelegate协议,作为业务组件和AppDlegate通信的桥梁。

所有组件的基类

 

具体实现,定义一个ModuleManager.swift

//  SwfitDemo
//  Created by menchao on 2018/9/26.
//  Copyright © 2018年 cedarhd. All rights reserved.

import UIKit

@objc public protocol ModuleManagerDelegate {

    @objc optional func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions:[UIApplicationLaunchOptionsKey : Any]?)

   //其它的处理。。。

    func applicationWillResignActive(_ application: UIApplication)

    func applicationDidEnterBackground(_ application: UIApplication)
}

public class ModuleManager : NSObject{

    static  let sharedInstace = ModuleManager.init()
    private override init(){

    }
public func loadModule(_ module: ModuleManagerDelegate? ){ if((module) != nil){ self.allModules.append(module!) } }
public func loadAllModule(_ modules:[Array<ModuleManagerDelegate>]?){ if((modules) != nil){ self.allModules.removeAll() for item in modules!{ self.allModules.append(item as! ModuleManagerDelegate) } } } // MARK: - app delegate public func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions:[UIApplicationLaunchOptionsKey : Any]?){ for service in self.allModules { let serviceDelegate = service if serviceDelegate.application != nil{ serviceDelegate.application!(application, didFinishLaunchingWithOptions: launchOptions) } } } lazy var allModules: Array<ModuleManagerDelegate> = { var array = Array<ModuleManagerDelegate>() return array }() }

ModuleManagerDelegate里的名称可以改为自己的名称,为了和系统相呼应,建议和系统保持一样的名字。

 定义一个推送消息模块RemotePushMoudel继承ModuleManagerDelegate,用来处理协议方法。如下,把推送相关的处理用extension定义,减少AppDelegate的臃肿import UIKit

import UserNotifications

// MARK: - push extension

extension AppDelegate{

    func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {

        print("deviceToken: \(deviceToken)")

    }

    func application(_ application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error: Error){

    }

    func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any]){

        //方法1.此处处理推送业务逻辑 具体的业务实现
     //do something

//方法2. 为了减少耦合,也可以把业务逻辑单独定义实现
     PushBusiness.oneBusinessReceiveRemotePush(userInfo: userInfo) } func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) { } } class RemotePushMoudel:NSObject, ModuleManagerDelegate, UNUserNotificationCenterDelegate { var delegate: AppDelegate = UIApplication.shared.delegate as! AppDelegate func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey : Any]?){ print("TestRemotePush 实现 application") self.registerAppNotificationSettings(launchOptions: launchOptions) }
func registerAppNotificationSettings(launchOptions: [UIApplicationLaunchOptionsKey : Any]?) { if #available(iOS 10.0, *) { let notifiCenter = UNUserNotificationCenter.current() notifiCenter.delegate = self let types = UNAuthorizationOptions(arrayLiteral: [.alert, .badge, .sound]) notifiCenter.requestAuthorization(options: types) { (flag, error) in if flag { print("iOS request notification success") }else{ print(" iOS 10 request notification fail") } } } else { let setting = UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil) UIApplication.shared.registerUserNotificationSettings(setting) } UIApplication.shared.registerForRemoteNotifications() } // MARK: - RemoteNotification @available(iOS 10.0, *) func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Swift.Void){ } @available(iOS 10.0, *) public func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Swift.Void){ } }

  

定义一个业务类PushBusiness,这个类可以专门处理推送相关的业务逻辑,实现如下:

//业务处理

class PushBusiness: NSObject {

    class  func oneBusinessReceiveRemotePush(userInfo: [AnyHashable : Any]) {

        print("userInfo: \(userInfo)")
//处理具体推送业务 } }

定义完了以上,下一步用一个类管理所有的业务,定义 ServiceComponentManager 如下:

import UIKit
public class ServiceComponentManager {
public class func registerAllService(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions:[UIApplicationLaunchOptionsKey : Any]?){ /// add all Moudel //push let pushModule = RemotePushMoudel() ModuleManager.sharedInstace.loadModule(pushModule)     //添加其它 //pay //other ModuleManager.sharedInstace.application(application,didFinishLaunchingWithOptions: launchOptions) } }

  

以上定义好了后,直接在AppDelegate的入口方法添加即可。

class AppDelegate: UIResponder, UIApplicationDelegate {
    var window: UIWindow?
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
        // Override point for customization after application launch.
        self.window = UIWindow(frame: UIScreen.main.bounds)
        self.window?.backgroundColor = UIColor.white
        self.window?.rootViewController = RootTabBarController()
        self.window?.makeKeyAndVisible()

        //注册服务模块
        ServiceComponentManager.registerAllService(application, didFinishLaunchingWithOptions: launchOptions)
        return true
    }
}

通过以上说明,可以做到对AppDelegate组件化分解,减少AppDelegate的臃肿,这样定义耦合性就很低了,不同的业务互不干扰,方便维护。如果项目需要增加如分享,支付等,都可以使用类似方法,如果想在不同的项目中复用RemotePushMoudel,还可以在改造,RemotePushMoudel放到MCHKit中,业务代码抽离到业务模块类,可以通过通知或delegate等来实现。 虽然代码量稍有增加,但是可读性更强,同时也做到了高内聚,低耦合。

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转载自www.cnblogs.com/menchao/p/9729839.html