afnetworking 2.0 when Deployment Target below 6.0 when , Afurlconnectionoperation.h,afurlsessionmanager.h
@property (nonatomic, strong) dispatch_queue_t Completionqueue;
because MD5 below 6.0 when ,dispatch_queue_t ARC not managed, out of the present prompt error
Property with ' retain (or strong) ' attribute must be of Object type
Modify to be
/**
Thedispatch queue for ' Completionblock '. If ' NULL ' (default), the main queue isused.
*/
Modify by Dai Date:2014/05/22
#if OS_OBJECT_USE_OBJC
@property (nonatomic,strong) dispatch_queue_t Completionqueue;
#else
@property (nonatomic,assign) dispatch_queue_tCompletionqueue;
#endif
/**
Thedispatch Group for ' Completionblock '. If ' NULL ' (default), a private dispatchgroup is used.
*/
#if OS_OBJECT_USE_OBJC
@property (nonatomic,strong) Dispatch_group_tcompletiongroup;
#else
@property (nonatomic,assign) dispatch_group_tCompletiongroup;
#endif