AFNetworking 2.0错误：具有“保留（或强）”属性的属性必须是对象类型[重复]

This question already has an answer here:

这个问题在这里已有答案：

• What property should I use for a Dispatch Queue after ARC? 5 answers
• ARC之后我应该使用什么属性用于Dispatch Queue？ 5个答案

Updated my project to AFNetworking, Xcode show this error:

将我的项目更新为AFNetworking，Xcode显示此错误：

@property (nonatomic, strong) dispatch_queue_t completionQueue;

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

具有“保留或强”属性的属性必须是对象类型。

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

我不明白为什么官方的例子没有错误警告？

1 个解决方案

#1

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

我明白了，因为我在iOS5上测试，dispatch_queue_t是从iOS6开始的objcet