ios Undefined symbols for architecture x86_64: "XXX", "_OBJC_CLASS_$_", referenced fr
iOS出现错误。
Undefined symbols for architecture x86_64:
"_IJKMPMediaPlaybackIsPreparedToPlayDidChangeNotification", referenced from:
-[IJKMoviePlayerSvodViewController installMovieNotificationObservers] in IJKMoviePlayerSvodViewController.o
-[IJKMoviePlayerSvodViewController removeMovieNotificationObservers] in IJKMoviePlayerSvodViewController.o
-[IJKMoviePlayerPplayViewController installMovieNotificationObservers] in IJKMoviePlayerPplayViewController.o
-[IJKMoviePlayerPplayViewController removeMovieNotificationObservers] in IJKMoviePlayerPplayViewController.o
-[IJKMoviePlayerUplayViewController installMovieNotificationObservers] in IJKMoviePlayerUplayViewController.o
-[IJKMoviePlayerUplayViewController removeMovieNotificationObservers] in IJKMoviePlayerUplayViewController.o
"_IJKMPMoviePlayerLoadStateDidChangeNotification", referenced from:
-[IJKMoviePlayerSvodViewController installMovieNotificationObservers] in IJKMoviePlayerSvodViewController.o
-[IJKMoviePlayerSvodViewController removeMovieNotificationObservers] in IJKMoviePlayerSvodViewController.o
-[IJKMoviePlayerPplayViewController installMovieNotificationObservers] in IJKMoviePlayerPplayViewController.o
-[IJKMoviePlayerPplayViewController removeMovieNotificationObservers] in IJKMoviePlayerPplayViewController.o
-[IJKMoviePlayerUplayViewController installMovieNotificationObservers] in IJKMoviePlayerUplayViewController.o
-[IJKMoviePlayerUplayViewController removeMovieNotificationObservers] in IJKMoviePlayerUplayViewController.o
"_IJKMPMoviePlayerPlaybackDidFinishNotification", referenced from:
-[IJKMoviePlayerSvodViewController installMovieNotificationObservers] in IJKMoviePlayerSvodViewController.o
-[IJKMoviePlayerSvodViewController removeMovieNotificationObservers] in IJKMoviePlayerSvodViewController.o
-[IJKMoviePlayerPplayViewController installMovieNotificationObservers] in IJKMoviePlayerPplayViewController.o
-[IJKMoviePlayerPplayViewController removeMovieNotificationObservers] in IJKMoviePlayerPplayViewController.o
-[IJKMoviePlayerUplayViewController installMovieNotificationObservers] in IJKMoviePlayerUplayViewController.o
-[IJKMoviePlayerUplayViewController removeMovieNotificationObservers] in IJKMoviePlayerUplayViewController.o
"_IJKMPMoviePlayerPlaybackDidFinishReasonUserInfoKey", referenced from:
-[IJKMoviePlayerSvodViewController moviePlayBackDidFinish:] in IJKMoviePlayerSvodViewController.o
-[IJKMoviePlayerPplayViewController moviePlayBackDidFinish:] in IJKMoviePlayerPplayViewController.o
-[IJKMoviePlayerUplayViewController moviePlayBackDidFinish:] in IJKMoviePlayerUplayViewController.o
"_IJKMPMoviePlayerPlaybackStateDidChangeNotification", referenced from:
-[IJKMoviePlayerSvodViewController installMovieNotificationObservers] in IJKMoviePlayerSvodViewController.o
-[IJKMoviePlayerSvodViewController removeMovieNotificationObservers] in IJKMoviePlayerSvodViewController.o
-[IJKMoviePlayerPplayViewController installMovieNotificationObservers] in IJKMoviePlayerPplayViewController.o
-[IJKMoviePlayerPplayViewController removeMovieNotificationObservers] in IJKMoviePlayerPplayViewController.o
-[IJKMoviePlayerUplayViewController installMovieNotificationObservers] in IJKMoviePlayerUplayViewController.o
-[IJKMoviePlayerUplayViewController removeMovieNotificationObservers] in IJKMoviePlayerUplayViewController.o
"_OBJC_CLASS_$_IJKFFMoviePlayerController", referenced from:
objc-class-ref in IJKMoviePlayerSvodViewController.o
objc-class-ref in IJKMoviePlayerPplayViewController.o
objc-class-ref in IJKMoviePlayerUplayViewController.o
"_OBJC_CLASS_$_IJKFFOptions", referenced from:
objc-class-ref in IJKMoviePlayerSvodViewController.o
objc-class-ref in IJKMoviePlayerPplayViewController.o
objc-class-ref in IJKMoviePlayerUplayViewController.o
"_OBJC_CLASS_$_LiveVideoCoreSDK", referenced from:
objc-class-ref in LiveShowViewController.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
解决方法
这个错误的发生原因一般是“XXX”这个文件（类库）虽然引入了工程中，但是由于种种原因（常见于多人开发，svn同步不规范）导致“XXX”并未被添加到project.pbxproj这个文件中。
解决方法是点击工程，
1.看这个是不是第三方库中的类
在 target －> Build Phases －> Link Binary With Libraries 中添加，类所在的第三方库。
2如果是自己项目中的类
在targets界面中找到Build Phases，根据提示信息“XXX”来判断缺少什么文件，一般如果缺少自定义的文件，XXX会是缺少的类名，那么就在Complie Sources中加入该文件。如果缺少类库，
则在Link Binary With Libraries中加入该类库。
如果这样还不行，估计是这个第三方库不支持 模拟器，或，真机的架构，之类的问题，反正；就是link方面没有这个类的原因