1.文件冲突问题 (Multiple commands produce)
Multiple commands produce '/Users/XX/Library/Developer/Xcode/DerivedData/Ble_Car-davkwupkdpvravbroathtuojnyhv/Build/Products/Debug-iphonesimulator/XXX.app/Info.plist'
解决方法：找到项目中冲突文件删除一个即可或者重命名重复文件
2.Undefined symbols for architecture x86_64
Undefined symbol: _OBJC_CLASS_$_AVAudioSession
Undefined symbol: _AVAudioSessionInterruptionNotification
Undefined symbol: _AVAudioSessionCategoryPlayAndRecord
Undefined symbol: _AVAudioSessionInterruptionTypeKey
Undefined symbol: _AVAudioSessionCategoryPlayback
解决方法:添加库frameworks BuildSettings -> Build Phase -> Link Binary with libraries