我需要一点帮助来转换它MIDIDeviceRefmidiDevice=MIDIGetDevice(i);NSDictionary*midiProperties;MIDIObjectGetProperties(midiDevice,(CFPropertyListRef*)&midiProperties,YES);NSLog(@"Midiproperties:%d\n%@",i,midiProperties);swift。我有这个，但我对转换CFPropertList挂断了电话。varmidiDevice=MIDIGetDevice(index)letmidiProperties=NSDi