获取类的属性的真实类型
const char * attributes = property_getAttributes(property);
NSString *attributesString = [NSString stringWithUTF8String:attributes];
打印attributesString得到:Ti,N,V_flightID
获取类的属性的真实类型
const char * attributes = property_getAttributes(property);
NSString *attributesString = [NSString stringWithUTF8String:attributes];
打印attributesString得到:Ti,N,V_flightID