2018.11.14
项目：https://github.com/BradLarson/GPUImage 中的工程GPUImage-master/examples/iOS/FilterShowcase/FilterShowcase.xcodeproj
问题：This app has crashed because it attempted to access privacy-sensitive data without ausage description. The app's Info.plist must contain anNSPhotoLibraryUsageDescription key with a string value explaining to the user how the app uses this data.
解决参考：https://www.jianshu.com/p/c212cde86877
ios端能够调用相机
