AFNetworking 2.0 ERROR:Property with 'retain (or strong)' attribute must be of object type

iphone ios objective-c afnetworking afnetworking-2
Chris picture Chris · Oct 16, 2013 · Viewed 8.9k times · Source

Updated my project to AFNetworking, Xcode show this error:

@property (nonatomic, strong) dispatch_queue_t completionQueue;

Property with 'retain or strong' attribute must be of object type.

I cannot understand why the official example there is no error warning?

Answer

Chris picture Chris · Oct 17, 2013

I get it, because I test on iOS5, dispatch_queue_t is objcet begin at iOS6

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