injectionIII iOS代码注入工具（下）

本文将解决如何使用injectionIII对主页热重载，如果对injectionIII不了解的同学请回到上篇查看

Vaccine

简单地说Vaccine其实是injectionIII的注入功能无法注入的地方通过它来进行实现，从整体上观看Vaccine整个框架的文件结构来看，里面有很多的extension的文件。

Vaccine文件结构

Vaccine可以用Cocoapods或者Carthage，也可以手动导入项目中的Source文件夹。

pod 'Vaccine'

github "zenangst/Vaccine"

Vaccine样例解析

项目中提供了一个样例项目，按照下面的步骤配置即可

Install InjectionIII from the Mac App Store
git clone git@github.com:zenangst/Vaccine.git
Run pod install in Example/VaccineDemo/
Open and run VaccineDemo.xcworkspace
Select the demo project when InjectionIII wants you to select a folder.
Start having fun

（不会有人看不懂吧）

这里我们在此项目开始解决文章开头提出的问题：对主页热重载。

先展示在AppDelegate中的关键代码：

func application(_ application: UIApplication,

                   didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

    Injection.load(then: loadApp).add(observer: self, with: #selector(injected(_:)))

    return true

  }

  private func loadApp() {

  //新建HomeVC

  //配置self.window

  }

  private func configureApperance() {

    UINavigationBar.appearance().barStyle = .default

    UINavigationBar.appearance().tintColor = .blue

  }

  @objc open func injected(_ notification: Notification) {

    /*

     TODO: Uncomment line 69 to 70 to change the device resolution you want to test with.

     This will also reload the application by invoking `loadApp()` which creates a new main window.

     */

    //screenBounds = UIScreen.device(.iPhoneX(orientation: nil))

    //loadApp()

    /*

     TODO: Uncomment line 76 to 92 to show detail controller on each injection.

     Animations are temporarely disabled for a better debugging environment.

     */

//    guard let flowController = flowController,

//      let listController = listViewController else { return }

//

//    let contact = Contact(firstName: "John",

//                          lastName: "Appleseed",

//                          phoneNumbers: [

//                            "(888) 555-5512",

//                            "(888) 555-1212"],

//                          emails: ["John-Appleseed@mac.com"],

//                          notes: "Some notes"

//    )

//

//    UIView.setAnimationsEnabled(false)

//    flowController.listViewController(listController, didSelect: contact)

//    DispatchQueue.main.asyncAfter(deadline: .now() + 2) {

//      UIView.setAnimationsEnabled(true)

//    }

  }

}

样例中，Vaccine在didFinishLaunchingWithOptions中实现了InjectionIII的注入和添加响应热更新的观察者，另外会调用loadApp方法，也就是我们日常需要实现的homeVC和self.window。

每当摁下cmd+s，appdelegate作为观察者将会调用injected:方法，如果想重新刷新homeVC，你只需要把self.window和homeVC重新生成就好了，也就是把loadAPP()的注释解开。

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