Iphone 在iOS中检查Internet连接的最简单方法是什么?

Iphone 在iOS中检查Internet连接的最简单方法是什么?,iphone,ios,objective-c,Iphone,Ios,Objective C,可能重复: 我正在寻找最快最简单的方法来检查iOS中的连接 我发现: -(BOOL)connectedToNetwork { NSURL* url = [[NSURL alloc] initWithString:@"http://google.com/"]; NSData* data = [NSData dataWithContentsOfURL:url]; if (data != nil) return YES; return NO; }

可能重复:

我正在寻找最快最简单的方法来检查iOS中的连接

我发现:

-(BOOL)connectedToNetwork  {
    NSURL* url = [[NSURL alloc] initWithString:@"http://google.com/"];
    NSData* data = [NSData dataWithContentsOfURL:url];
    if (data != nil)
        return YES;
    return NO;
}
你知道有什么更简单的吗

伙计们,谢谢你们提供的所有答案,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/否范围)

看看苹果提供的解决方案

您的方法可能存在的问题是,您可能有一个超时,因此,同步下载某些数据可能会阻止您的应用程序。因此,苹果可能会拒绝您的应用程序

可按如下方式使用:

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
}

我建议不要采用这种方法。因为这个代码,我的一个应用程序被拒绝了。相反,你应该去

正如@who9vy所说的使用

将两个类Reachability.h和Reachability.m导入到项目中

使用方法检查Internet连接

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

检查可达性的最佳方法是Apple Recability类

检查这个


希望它能帮助您..

使用此代码检查设备是否连接到internet

在viewDidLoad中使用以下代码:

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

    hostReachable = [Reachability reachabilityWithHostName: @"www.apple.com"] ;
    [hostReachable startNotifier];
并将此函数添加到代码中:

-(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);
}

不建议检查与网站的Internet连接。因为即使是谷歌。在未来,谷歌网站可以单独关闭(谁知道呢),但你们将有互联网连接。所以,使用可恢复代码检查互联网连接。这是苹果公司推荐的。检查我的答案。是的,我们不应该使用“www.apple.com”,我们应该使用各自的主机名。如果apple.com无法访问,这并不意味着我们的应用程序无法访问我们的服务。只有在可用的情况下,我们才应该检查主机名。
-(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);
}