injectionIII iOS代碼注入工具（下）

injectionIII iOS代碼注入工具（下）

本文將解決如何使用injectionIII對主頁熱重載，如果對injectionIII不瞭解的同學請回到上篇查看

Vaccine

簡單地說Vaccine其實是injectionIII的注入功能無法注入的地方通過它來進行實現，從整體上觀看Vaccine整個框架的文件結構來看，裏面有很多的extension的文件。

Vaccine文件結構

Vaccine可以用Cocoapods或者Carthage，也可以手動導入項目中的Source文件夾。

pod 'Vaccine'

github "zenangst/Vaccine"

Vaccine樣例解析

項目中提供了一個樣例項目，按照下面的步驟配置即可

1. Install InjectionIII from the Mac App Store
2. git clone [email protected]:zenangst/Vaccine.git
3. Run pod install in Example/VaccineDemo/
4. Open and run VaccineDemo.xcworkspace
5. Select the demo project when InjectionIII wants you to select a folder.
6. Start having fun 🤩

（不會有人看不懂吧）

這裏我們在此項目開始解決文章開頭提出的問題：對主頁熱重載。

先展示在AppDelegate中的關鍵代碼：

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: [
//                            "[phone]",
//                            "[phone]"],
//                          emails: ["[email protected]"],
//                          notes: "Some notes"
//    )
//
//    UIView.setAnimationsEnabled(false)
//    flowController.listViewController(listController, didSelect: contact)
//    DispatchQueue.main.asyncAfter(deadline: .now() + 2) {
//      UIView.setAnimationsEnabled(true)
//    }
  }
}

樣例中，Vaccine在didFinishLaunchingWithOptions中實現了InjectionIII的注入和添加響應熱更新的觀察者，另外會調用loadApp方法，也就是我們日常需要實現的homeVC和self.window。

每當摁下cmd+s，appdelegate作爲觀察者將會調用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()的註釋解開。

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