PubNub历史分页示例代码

所有sdk都有实现历史分页的示例代码。请参考 PubNub Swift SDK Storage API Reference History Paging section .

下面是内联的代码:

分页历史记录响应: 可以通过传递0或有效的时间标记作为参数来调用该方法。

// Pull out all messages newer then message sent at 14395051270438477.
let date = NSNumber(value: (14395051270438477 as CUnsignedLongLong));
self.historyNewerThen(date, onChannel: "history_channel", withCompletion:  { (messages) in

    print("Messages from history: \(messages)")
})


func historyNewerThen(_ date: NSNumber, onChannel channel: String, 
                      withCompletion closure: @escaping (Array<Any>) -> Void) {

    var msgs: Array<Any> = []
    self.historyNewerThen(date, onChannel: channel, withProgress: { (messages) in

        msgs.append(contentsOf: messages)
        if messages.count < 100 { closure(msgs) }
    })
}

private func historyNewerThen(_ date: NSNumber, onChannel channel: String, 
                              withProgress closure: @escaping (Array<Any>) -> Void) {

    self.client?.historyForChannel(channel, start: date, end: nil, limit: 100, 
                                   reverse: false, withCompletion: { (result, status) in

        if status == nil {

            closure((result?.data.messages)!)
            if result?.data.messages.count == 100 {

                self.historyNewerThen((result?.data.end)!, onChannel: channel, 
                                      withProgress: closure)
            }
        }
        else {

            /**
             Handle message history download error. Check 'category' property
             to find out possible reason because of which request did fail.
             Review 'errorData' property (which has PNErrorData data type) of status
             object to get additional information about issue.

             Request can be resent using: [status retry];
             */
        }
    })
}

请参阅其他特定于SDKs语言的实现中的同一节。