遇到的问题如下？

objc[35269]: Class PLBuildVersion is implemented in both /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/System/Library/PrivateFrameworks/AssetsLibraryServices.framework/AssetsLibraryServices (0x113f53998) and /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/System/Library/PrivateFrameworks/PhotoLibraryServices.framework/PhotoLibraryServices (0x113cd2880). One of the two will be used. Which one is undefined.

解决办法：

这样的问题遇到好多次，找了很多资料最后查到了这样个结果：

它不是编译器警告，它是Objective-C运行时警告，它不在您控制的任何代码中。你可以安全地忽略它，因为你无法解决它。