Question

我有一个应用程序，它是完全地图视图。我需要的是如果用户没有连接到互联网，我需要显示一些警报。我做到了。这是代码：

Reachability.swift.

import Foundation
import SystemConfiguration

public class Reachability {

    class func isConnectedToNetwork() -> Bool {

        var zeroAddress = sockaddr_in(sin_len: 0, sin_family: 0, sin_port: 0, sin_addr: in_addr(s_addr: 0), sin_zero: (0, 0, 0, 0, 0, 0, 0, 0))
        zeroAddress.sin_len = UInt8(sizeofValue(zeroAddress))
        zeroAddress.sin_family = sa_family_t(AF_INET)

        let defaultRouteReachability = withUnsafePointer(&zeroAddress) {
            SCNetworkReachabilityCreateWithAddress(kCFAllocatorDefault, UnsafePointer($0))
        }

        var flags: SCNetworkReachabilityFlags = SCNetworkReachabilityFlags(rawValue: 0)
        if SCNetworkReachabilityGetFlags(defaultRouteReachability!, &flags) == false {
             return false
        }

        let isReachable = flags == .Reachable
        let needsConnection = flags == .ConnectionRequired

        return isReachable && !needsConnection

    }
}
if Reachability.isConnectedToNetwork() == true {
    println("Internet connection OK")
} else {
    println("Internet connection FAILED")
    var alert = UIAlertView(title: "No Internet Connection", message: "Make sure your device is connected to the internet.", delegate: nil, cancelButtonTitle: "OK")
    alert.show()
}

但我需要的是：当用户未连接到互联网时，会显示一条UIAlertView消息。在那个警报中我有一个OK按钮。因此，在用户连接到互联网之前，可以将它们重定向到移动数据开/关设置，或者可以显示UIAlertView消息，直到用户连接到互联网..

请帮帮我!!

Answer 1

点击alertview中的ok按钮，您可以将用户重定向到所需的页面，调用相应的segue。第二个选项，如果要阻止用户，只需显示包含自定义消息的活动指示符。

Answer 2

有一件事是让用户了解网络状态。

构建应用程序以支持所有这些网络状态是完全不同的事情。

确保您的用户了解当前的网络状态，同时确保应用程序的行为与此相符。

不，您无法直接重定向到Wi-Fi设置。

Answer 3

启动iOS设备设置页面

Step.1 转到项目设置 - ＆gt;信息 - ＆gt;网址类型 - ＆gt;添加新的URL方案

Step.2 在viewWillAppear方法中检查互联网并显示提醒

override func viewWillAppear(animated: Bool)
    {
        //check for internet
        if Reachability.isConnectedToNetwork() == true
        {
            print("Internet connection OK")

        }
        else
        {
            print("Internet connection off")

            let alertView: UIAlertView = UIAlertView(title: "Alert!", message: "Please enable internet settings", delegate: self, cancelButtonTitle: "Settings", otherButtonTitles: "Cancel")
            alertView.show()
            return
        }
    }

Step.3 处理提醒按钮点击

func alertView(alertView: UIAlertView, clickedButtonAtIndex buttonIndex: Int)
    {
        if buttonIndex == 0
        {
                //This will open ios devices wifi settings
                UIApplication.sharedApplication().openURL(NSURL(string: "prefs:root")!)
        }
        else if buttonIndex == 1
        {
            //TODO for cancel
        }
    }

注意：不要忘记确认UIAlertViewDelegate

点击此处完整示例代码我已经测试了

import UIKit


class ViewController: UIViewController, UIAlertViewDelegate
{

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }


    override func viewWillAppear(animated: Bool)
    {
        //check for internet
        if Reachability.isConnectedToNetwork() == true
        {
            print("Internet connection OK")
        }
        else
        {
            print("Internet connection off")

            let alertView: UIAlertView = UIAlertView(title: "Alert!", message: "Please enable internet settings", delegate: self, cancelButtonTitle: "Settings", otherButtonTitles: "Cancel")
            alertView.show()
            return
        }
    }



    func alertView(alertView: UIAlertView, clickedButtonAtIndex buttonIndex: Int)
    {
        if buttonIndex == 0
        {
                //This will open ios devices wifi settings
                UIApplication.sharedApplication().openURL(NSURL(string: "prefs:root")!)
        }
        else if buttonIndex == 1
        {
            //TODO for cancel
        }
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

}

Answer 4

1-）您的应用目标＆gt;信息＆gt; URL类型然后添加像这样的新URL类型;

2-）在你的AppDelegate中，定义这个变量;

var isInternetConnected = false

3-）在UIViewController中，定义一个AppDelegate变量，然后在UIViewController viewDidLoad()方法中，开始监听连接;

let appDelegate: AppDelegate = UIApplication.sharedApplication().delegate as! AppDelegate

override func viewDidLoad() {
    super.viewDidLoad()

    NSNotificationCenter.defaultCenter().addObserver(self, selector: "internetNotifier:", name: kReachabilityChangedNotification, object: nil)
    Reachability.reachabilityForInternetConnection().startNotifier()
}

4-）在你的internetNotifier方法中，检查连接;

func internetNotifier(notification: NSNotification) {
    if let reachObject = notification.object as? Reachability {
        switch reachObject.isReachable() {
        case true:
            appDelegate.isInternetConnected = true
            hideAlertController()
        case false:
            appDelegate.isInternetConnected = false
            presentViewController(UIAlertController.showAlertController(), animated: true, completion: nil)
        }
    }
}

func hideAlertController() {
    if self.navigationController?.visibleViewController is UIAlertController {
         dismissViewControllerAnimated(true, completion: nil)
    }
}

5-）在UIAlertController中创建AppDelegate的新扩展名;

extension UIAlertController {

    class final func showAlertController() -> UIAlertController {
        let internetController = self.init(title: "Error", message: "No internet connection. Go to Settings and open your Wi-Fİ", preferredStyle: .Alert)
        internetController.addAction(UIAlertAction(title: "Go to Settings", style: .Default, handler: { (internetController) -> Void in
            if let settingsURL = NSURL(string: "prefs:root=WIFI") where UIApplication.sharedApplication().canOpenURL(settingsURL) {
                dispatch_async(dispatch_get_main_queue()) {
                    UIApplication.sharedApplication().openURL(settingsURL)
                }
            }
        }))
        return internetController
    }

}

6-）最后也是最重要的一步，在AppDelegate中调用你的UIAlertController;

func applicationWillEnterForeground(application: UIApplication) {
    if !isInternetConnected {
       window?.rootViewController?.presentViewController(UIAlertController.showAlertController(), animated: true, completion: nil)
    }
}

因为，如果用户进入设置打开网络然后返回您的应用程序而仍然没有连接，则需要再次向他显示您的警报。不要忘记在UIViewController;

中删除您的连接观察者

deinit {
    NSNotificationCenter.defaultCenter().removeObserver(self, name: kReachabilityChangedNotification, object: nil)
    Reachability.reachabilityForInternetConnection().stopNotifier()
}

当我的应用加载

4 个答案: