我是 IOS 应用程序开发的初学者,我想“在使用该应用程序(IOS xcode swift)期间丢失可达性连接时弹出警报”, 但我只在启动我的应用程序时收到弹出警报。当互联网连接丢失时,在使用我的应用程序期间没有弹出警报。请帮忙,谢谢!
我做了什么: 1) 创建一个 Reachability.swift 文件并写
import Foundation
public class Reachability {
class func isConnectedToNetwork()->Bool{
var Status:Bool = false
let url = NSURL(string: "http://google.com/")
let request = NSMutableURLRequest(URL: url!)
request.HTTPMethod = "HEAD"
request.cachePolicy = NSURLRequestCachePolicy.ReloadIgnoringLocalAndRemoteCacheData
request.timeoutInterval = 10.0
var response: NSURLResponse?
var data = NSURLConnection.sendSynchronousRequest(request, returningResponse: &response, error: nil) as NSData?
if let httpResponse = response as? NSHTTPURLResponse {
if httpResponse.statusCode == 200 {
Status = true
}
}
return Status
}
}
2) 如下编辑ViewController.swift文件
import UIKit
class ViewController: UIViewController {
@IBOutlet weak var WebView: UIWebView!
//ViewDidLoad method
override func viewDidLoad() {
super.viewDidLoad()
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()
}
var URL = NSURL(string: "http://www.google.com/")
WebView.loadRequest(NSURLRequest(URL: URL!))
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
}
最佳答案
试试这个 Reachabilty类,将其添加到您的项目中,并在您的 viewController
let reachability = Reachability.reachabilityForInternetConnection()
reachability.whenReachable = { reachability in
if reachability.isReachableViaWiFi() {
let alertController = UIAlertController(title: "Alert", message: "Reachable via WiFi", preferredStyle: .Alert)
let defaultAction = UIAlertAction(title: "OK", style: .Default, handler: nil)
alertController.addAction(defaultAction)
presentViewController(alertController, animated: true, completion: nil)
}
else {
let alertController = UIAlertController(title: "Alert", message: "Reachable via Cellular", preferredStyle: .Alert)
let defaultAction = UIAlertAction(title: "OK", style: .Default, handler: nil)
alertController.addAction(defaultAction)
presentViewController(alertController, animated: true, completion: nil)
}
}
reachability.whenUnreachable = { reachability in
let alertController = UIAlertController(title: "Alert", message: "Not Reachable", preferredStyle: .Alert)
let defaultAction = UIAlertAction(title: "OK", style: .Default, handler: nil)
alertController.addAction(defaultAction)
presentViewController(alertController, animated: true, completion: nil)
}
reachability.startNotifier()
关于ios - 在使用应用程序期间丢失可达性连接时弹出警报(IOS xcode swift),我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/31400192/