InjectionIII

概述

injectionIII 工具可以动态加载Swift、Objective-C代码到已经在运行的程序中执行，热加载。该项目由John Holdsworth 提供，是一个开源项目

效果

效果来自源项目

injected.gif

安装使用

1. App Store 下载 InjectionIII（或到源项目clone 进行构建）
   2.Open file -> Project path
   3.select File Watcher
   
   openfile.png
   
   4.添加如下代码到项目的AppDelegate中的func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool
   Before Xcode 10:(swift)

#if DEBUG
Bundle(path: "/Applications/InjectionIII.app/Contents/Resources/iOSInjection.bundle")?.load()
//for tvOS:
Bundle(path: "/Applications/InjectionIII.app/Contents/Resources/tvOSInjection.bundle")?.load()
//Or for macOS:
Bundle(path: "/Applications/InjectionIII.app/Contents/Resources/macOSInjection.bundle")?.load()
#endif

After Xcode 10:

#if DEBUG
Bundle(path: "/Applications/InjectionIII.app/Contents/Resources/iOSInjection10.bundle")?.load()
//for tvOS:
Bundle(path: "/Applications/InjectionIII.app/Contents/Resources/tvOSInjection10.bundle")?.load()
//Or for macOS:
Bundle(path: "/Applications/InjectionIII.app/Contents/Resources/macOSInjection10.bundle")?.load()
#endif

5.在项目需要修改的代码类中添加如下代码

 @objc func injected(){
        
        print("I've been injected: \(self)")
        
    }

6.修改运行中的程序的代码时，只需要按下Command + S saved, 就所修改的代码就会显示在simulator上

注意⚠️

亲测的该工具适用Simulator

原理

感兴趣的可以看一下这篇文章