iphone - 如何检查wifi选项是否启用

Question

如何检查 iPhone 上是否启用了 wifi 选项(但可能 iPhone 未连接到其中一个 wifi 网络)。

Answer 1

为此，您需要在项目中导入可达性类。

之后:-

#import "Reachability.h"

在你查看 DidLoad 时写:-

- (void)viewDidLoad {
    Reachability *internetReach = [[Reachability reachabilityForInternetConnection] retain];
    [internetReach startNotifer];
    Reachability *wifiReach = [[Reachability reachabilityForLocalWiFi] retain];
    [wifiReach startNotifer];

    NetworkStatus netStatus1 = [internetReach currentReachabilityStatus];
    NetworkStatus netStatus2 = [wifiReach currentReachabilityStatus];
    if(netStatus1 == NotReachable && netStatus2 == NotReachable)
    {
        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Sorry" message:@"This feature requires an internet connection." delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
        [alertView show];
        [alertView release];
    }
    else
    {//wifi connection available;
}
}