Warning: Error creating LLDB target at path '/Users/apple/Library/Developer/Xcode/DerivedData/ObserverTrampoline-enpnnnawiljtyyfdrtqifjlakfiq/Build/Products/Debug-iphonesimulator/ObserverTrampoline.app'- using an empty LLDB target which can cause slow memory reads from remote devices.
这个是使用模拟器的警告，真机上没有影响