Question

使用Swift 2，我有以下代码：

//
//  CheckInternet.swift
//
//  Created by Dincer on 14/11/15.
//

import AFNetworking

public class Reachability {
    private static let theSharedInstance:Reachability = Reachability();
    private var isClientOnline:Bool = true;
    private var isClientWiFi:Bool = false;
    private var isClientConnectionUnknown = false;

    func onOnline() {
        print("****************************************** Network goes online.");
    }

    func onOffline() {
        print("****************************************** Network goes offline.");
    }

    func onWiFi() {
        print("****************************************** Wifi network on");
    }

    func onGSM() {
        print("****************************************** GSM network on");
    }

    func onUnknownConnectionStatus() {
        print("****************************************** Unkown network status");
    }

    func isConnectedToNetwork() -> Bool {
        return isClientOnline;
    }

    func isConnectedToWiFi() -> Bool {
        return isClientOnline && isClientWiFi;
    }

    static func sharedInstance() -> Reachability {
        return Reachability.theSharedInstance;
    }

    static func registerListener() {
        sharedInstance().registerListener();
    }

    func registerListener() {
        AFNetworkReachabilityManager.sharedManager().setReachabilityStatusChangeBlock { (status: AFNetworkReachabilityStatus) -> Void in
            switch status {
                case .NotReachable:
                    self.isClientConnectionUnknown = false;

                    if self.isClientOnline {
                        self.isClientOnline = false;
                        self.onOffline();
                    }
                case .ReachableViaWiFi:
                    self.isClientConnectionUnknown = false;

                    if !self.isClientOnline {
                        self.isClientOnline = true;
                        self.onOnline();
                    }

                    if !self.isClientWiFi {
                        self.isClientWiFi = true;
                        self.onWiFi();
                    }
                case .ReachableViaWWAN:
                    self.isClientConnectionUnknown = false;

                    if !self.isClientOnline {
                        self.isClientOnline = true;
                        self.onOnline();
                    }

                    if self.isClientWiFi {
                        self.isClientWiFi = false;
                        self.onGSM();
                    }
                case .Unknown:
                    if !self.isClientConnectionUnknown {
                        self.isClientConnectionUnknown = true;
                        self.onUnknownConnectionStatus();
                    }
            }
        }

        AFNetworkReachabilityManager.sharedManager().startMonitoring();
    }

}

不幸的是，这没有用。

有什么帮助才能让它发挥作用？

Answer 1

我相信用SwiftyJSON来获取一个JSON对象到swift中你应该做的数组类型

datas["products"].array or datas["products"].arrayValue

您是否首先将数组类扩展为shuffle方法？如果没有，你可以做这样的事情

extension CollectionType {
    /// Return a copy of `self` with its elements shuffled
    func shuffle() -> [Generator.Element] {
        var list = Array(self)
        list.shuffleInPlace()
        return list
    }
}

extension MutableCollectionType where Index == Int {
    /// Shuffle the elements of `self` in-place.
    mutating func shuffleInPlace() {
        // empty and single-element collections don't shuffle
        guard count >= 2 else { return }
        for i in 0..<count - 1 {
            let j = Int(arc4random_uniform(UInt32(count - i))) + i
            guard i != j else { continue }
            swap(&self[i], &self[j])
        }
    }
}

Source 。差异：If语句已更改为guard。

然后你可以做这样的事情

let shuffled = (datas["products"].array!).shuffle()

或者，如果您可以使用iOS 9 API，则无需任何扩展即可执行以下操作：

let shuffled = GKRandomSource.sharedRandom().arrayByShufflingObjectsInArray(datas["products"].array!)

SwiftyJSON Shuffle

1 个答案: