Swift队列和延迟过程

在迅速3.0

我需要在节点服务器上点击一个button发送一个字典，用户可以频繁地点击或点击这个button。

所以我需要一次又一次地把这个字典发送到队列中，并延迟一段时间。 同时用户可以多次按HIT键，但QUEUE会逐个单独执行，不依赖于单击button。 这是我的代码

func sendProductInCart(Product: NSString) { delayWithSeconds(5) { let msgToSend: String = String.init(format: "__JSON__START__%@__JSON__END__", Product) print("++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++") print(msgToSend) let data: Data? = msgToSend.data(using: String.Encoding.utf8) _ = data?.withUnsafeBytes { self.outputStream.write($0, maxLength: (data?.count)!) } } } func delayWithSeconds(_ seconds: Double, completion: @escaping () -> ()) { DispatchQueue.main.asyncAfter(deadline: .now() + seconds) { completion() } } 

但这是行不通的。 5秒后所有产品发送到这5秒的范围内。 我一次只需要一个。 请分享您宝贵的知识。

5秒后输出（我有10次点击button）

 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ __JSON__START__{"type": "4","message": {"categoryid":"1","productId":"2","productprice":"10.00","productimage":"http:\/\/183.182.84.77:8082\/Content\/ProductImages\/chips2.JPG","productname":"B-Chips Premimum appetizer 40g -40","chanelname":"88719922048109810977","quantity":"2","producttype":"0","categoryName":"Alimentacion"}, "sender_id":"8109810977", "reciever_id": "8871992204", "time": "10-12-2017 05:16:09","connection_type":"cart"}__JSON__END__ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ __JSON__START__{"type": "4","message": {"categoryid":"1","productId":"2","productprice":"10.00","productimage":"http:\/\/183.182.84.77:8082\/Content\/ProductImages\/chips2.JPG","productname":"B-Chips Premimum appetizer 40g -40","chanelname":"88719922048109810977","quantity":"3","producttype":"0","categoryName":"Alimentacion"}, "sender_id":"8109810977", "reciever_id": "8871992204", "time": "10-12-2017 05:16:09","connection_type":"cart"}__JSON__END__ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ __JSON__START__{"type": "4","message": {"categoryid":"1","productId":"2","productprice":"10.00","productimage":"http:\/\/183.182.84.77:8082\/Content\/ProductImages\/chips2.JPG","productname":"B-Chips Premimum appetizer 40g -40","chanelname":"88719922048109810977","quantity":"4","producttype":"0","categoryName":"Alimentacion"}, "sender_id":"8109810977", "reciever_id": "8871992204", "time": "10-12-2017 05:16:09","connection_type":"cart"}__JSON__END__ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ __JSON__START__{"type": "4","message": {"categoryid":"1","productId":"2","productprice":"10.00","productimage":"http:\/\/183.182.84.77:8082\/Content\/ProductImages\/chips2.JPG","productname":"B-Chips Premimum appetizer 40g -40","chanelname":"88719922048109810977","quantity":"5","producttype":"0","categoryName":"Alimentacion"}, "sender_id":"8109810977", "reciever_id": "8871992204", "time": "10-12-2017 05:16:09","connection_type":"cart"}__JSON__END__ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ __JSON__START__{"type": "4","message": {"categoryid":"1","productId":"2","productprice":"10.00","productimage":"http:\/\/183.182.84.77:8082\/Content\/ProductImages\/chips2.JPG","productname":"B-Chips Premimum appetizer 40g -40","chanelname":"88719922048109810977","quantity":"6","producttype":"0","categoryName":"Alimentacion"}, "sender_id":"8109810977", "reciever_id": "8871992204", "time": "10-12-2017 05:16:09","connection_type":"cart"}__JSON__END__ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ __JSON__START__{"type": "4","message": {"categoryid":"1","productId":"2","productprice":"10.00","productimage":"http:\/\/183.182.84.77:8082\/Content\/ProductImages\/chips2.JPG","productname":"B-Chips Premimum appetizer 40g -40","chanelname":"88719922048109810977","quantity":"7","producttype":"0","categoryName":"Alimentacion"}, "sender_id":"8109810977", "reciever_id": "8871992204", "time": "10-12-2017 05:16:09","connection_type":"cart"}__JSON__END__ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ __JSON__START__{"type": "4","message": {"categoryid":"1","productId":"2","productprice":"10.00","productimage":"http:\/\/183.182.84.77:8082\/Content\/ProductImages\/chips2.JPG","productname":"B-Chips Premimum appetizer 40g -40","chanelname":"88719922048109810977","quantity":"8","producttype":"0","categoryName":"Alimentacion"}, "sender_id":"8109810977", "reciever_id": "8871992204", "time": "10-12-2017 05:16:10","connection_type":"cart"}__JSON__END__ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ __JSON__START__{"type": "4","message": {"categoryid":"1","productId":"2","productprice":"10.00","productimage":"http:\/\/183.182.84.77:8082\/Content\/ProductImages\/chips2.JPG","productname":"B-Chips Premimum appetizer 40g -40","chanelname":"88719922048109810977","quantity":"9","producttype":"0","categoryName":"Alimentacion"}, "sender_id":"8109810977", "reciever_id": "8871992204", "time": "10-12-2017 05:16:10","connection_type":"cart"}__JSON__END__ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ __JSON__START__{"type": "4","message": {"categoryid":"1","productId":"2","productprice":"10.00","productimage":"http:\/\/183.182.84.77:8082\/Content\/ProductImages\/chips2.JPG","productname":"B-Chips Premimum appetizer 40g -40","chanelname":"88719922048109810977","quantity":"10","producttype":"0","categoryName":"Alimentacion"}, "sender_id":"8109810977", "reciever_id": "8871992204", "time": "10-12-2017 05:16:10","connection_type":"cart"}__JSON__END__ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ __JSON__START__{"type": "4","message": {"categoryid":"1","productId":"2","productprice":"10.00","productimage":"http:\/\/183.182.84.77:8082\/Content\/ProductImages\/chips2.JPG","productname":"B-Chips Premimum appetizer 40g -40","chanelname":"88719922048109810977","quantity":"11","producttype":"0","categoryName":"Alimentacion"}, "sender_id":"8109810977", "reciever_id": "8871992204", "time": "10-12-2017 05:16:10","connection_type":"cart"}__JSON__END__