Question

可能重复：
Check for internet connection - iOS SDK

我正在寻找检查iOS连接的最快最简单的方法。

我发现了这个：

-(BOOL)connectedToNetwork  {
    NSURL* url = [[NSURL alloc] initWithString:@"http://google.com/"];
    NSData* data = [NSData dataWithContentsOfURL:url];
    if (data != nil)
        return YES;
    return NO;
}

你知道是否有更简单的东西???

伙计们，感谢所有答案，但我正在寻找最简单，最轻便的解决方案，而不是最好的解决方案（即不需要区分3G / Wi-Fi，我只是在搜索网站的是/否覆盖率

Answer 1

查看Apple提供的Reachability Example。

您的方法可能存在的问题是您可能会超时，因此，某些数据的同步下载可能会阻止您的应用。因此，Apple可能拒绝您的应用。

Reachability Example可以按如下方式使用：

Reachability *_reachability = [Reachability reachabilityForInternetConnection];
NetworkStatus remoteHostStatus = [_reachability currentReachabilityStatus];
if (remoteHostStatus == NotReachable) {
    // not reachable
} else if (remoteHostStatus == ReachableViaWiFi) {
    // reachable via Wifi
} else if (remoteHostStatus == ReachableViaWWAN) {
    // reachable via WWAN
}

Answer 2

我建议不要采用这种方法。由于此代码，我面临拒绝我的一个应用程序。而是使用Apple's Reachability Classes.

Answer 3

使用此代码检查设备是否已连接到互联网

在viewDidLoad中使用此代码：

 Reachability* internetReachable; = [Reachability reachabilityForInternetConnection];
    [internetReachable startNotifier];

    hostReachable = [Reachability reachabilityWithHostName: @"www.apple.com"] ;
    [hostReachable startNotifier];

并将此函数添加到您的代码中：

-(void) checkNetworkStatus:(NSNotification *)notice
{
    recheabilityBool=FALSE;
    nonrecheabilityBool=FALSE;
    // called after network status changes
    NetworkStatus internetStatus = [internetReachable currentReachabilityStatus];
    switch (internetStatus)
    {
        case NotReachable:
        {
            nonrecheabilityBool=TRUE;
            internetCon=0;
            //NSLog(@"The internet is down.");


            break;
        }
        case ReachableViaWiFi:
        {
            NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
            internetCon=404;
            [prefs setInteger:internetCon forKey:@"conKey"];

            //NSLog(@"The internet is working via WIFI.");
            break;

        }
        case ReachableViaWWAN:
        {
            //NSLog(@"The internet is working via WWAN.");

            break;
        }
    }

    NetworkStatus hostStatus = [hostReachable currentReachabilityStatus];
    switch (hostStatus)
    {
        case NotReachable:
        {
            internetCon=0;
            if( nonrecheabilityBool==FALSE)
            {
                //NSLog(@"A gateway to the host server is down.");
            }
            break;

        }
        case ReachableViaWiFi:
        {
            if(recheabilityBool==FALSE)
            {

                recheabilityBool=TRUE;

                NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
                internetCon=404;
                [prefs setInteger:internetCon forKey:@"conKey"];


                //NSLog(@"The internet is working via WIFI.");
                break;
            }


            //NSLog(@"A gateway to the host server is working via WIFI.");

            break;
        }
        case ReachableViaWWAN:
        {
            //NSLog(@"A gateway to the host server is working via WWAN.");
            break;
        }
    }
}


- (BOOL)connected
{
    Reachability *reachability = [Reachability reachabilityForInternetConnection];
    NetworkStatus networkStatus = [reachability currentReachabilityStatus];
    return !(networkStatus == NotReachable);
}

Answer 4

Reachability* reachability = [Reachability sharedReachability];
[reachability setHostName:@"www.example.com"];    // set your host name here
NetworkStatus remoteHostStatus = [reachability remoteHostStatus];

How to check for an active Internet connection on iOS or OSX?

Answer 5

正如@ who9vy所说使用Reachability Example

将两个类Reachability.h和Reachability.m导入项目

使用方法检查Internet连接

- (BOOL)isConnectedToInternet
{
    Reachability *reachability = [Reachability reachabilityForInternetConnection]; 
    NetworkStatus networkStatus = [reachability currentReachabilityStatus];
    return !(networkStatus == NotReachable);
}

Answer 6

检查可达性的最佳方法是Apple Reachability类检查link

希望它可以帮助你..

在iOS中检查Internet连接的最简单方法是哪种？

6 个答案: