异步 – 检测是否在swift中启用了wifi

if(wifi is enabled)
{
    NSURLConnection.sendAsynchronousrequest
}

解决方法

步骤1：

将“SystemConfiguration”框架添加到项目中

第2步：

将此功能添加到您的项目：

func isConnectionAvailble()->Bool{

    var rechability = SCNetworkReachabilityCreateWithName(kcfAllocatorDefault,"www.apple.com").takeRetainedValue()

    var flags : SCNetworkReachabilityFlags = 0

    if SCNetworkReachabilityGetFlags(rechability,&flags) == 0
    {
        return false
    }

    let isReachable = (flags & UInt32(kSCNetworkFlagsReachablE)) != 0
    let needsConnection = (flags & UInt32(kSCNetworkFlagsConnectionrequired)) != 0
    return (isReachable && !needsConnection)
}