地址：https://github.com/johnno1962/injectionforxcode

Injection热加载只对模拟器有效，对真机无效

 第一步：App Store 搜索 InjectionIII 下载 运行即可

第二步：在AppDelegate.m中，didFinishLaunchingWithOptions方法里添加

#if DEBUG

    // iOS

    [[NSBundle bundleWithPath:@"/Applications/InjectionIII.app/Contents/Resources/iOSInjection.bundle"] load];

#endif

第三步：打开InjectionIII ，open project找到项目所在地

第四步：xcode运行代码，commend+r

背景：xcode12.2，模拟器选择iPhoneX（12.0）

运行报错：Error loading /Applications/InjectionIII.app/Contents/Resources/iOSInjection.bundle/iOSInjection: dlopen(/Applications/InjectionIII.app/Contents/Resources/iOSInjection.bundle/iOSInjection, 265): Library not loaded: @rpath/libswiftCore.dylib Referenced from: /Applications/InjectionIII.app/Contents/Resources/iOSInjection.bundle/iOSInjection Reason: no suitable image found. Did find: /usr/lib/swift/libswiftCore.dylib: mach-o, but not built for iOS simulator

解决方法：终端运行 open /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/lib/swift

找到xcode自带模拟器，选择模拟器iphone11（14.2）。

调试阶段：

-(void)injected{

    NSLog(@"我已经injected");

    [self viewDidLoad];

}

我们需要监听的页面里面重写这个方法即可