//Reachability.m 中 networkStatusForFlags 方法重构
- (NetworkStatus) networkStatusForFlags: (SCNetworkReachabilityFlags) flags
{
if ((flags & kSCNetworkReachabilityFlagsReachable) == 0)
{
return NotReachable;
}
BOOL retVal = NotReachable;
if ((flags & kSCNetworkReachabilityFlagsConnectionRequired) == 0)
{
// if target host is reachable and no connection is required
// then we‘ll assume (for now) that your on Wi-Fi
retVal = ReachableViaWiFi;
}
if ((((flags & kSCNetworkReachabilityFlagsConnectionOnDemand ) != 0) ||
(flags & kSCNetworkReachabilityFlagsConnectionOnTraffic) != 0))
{
// ... and the connection is on-demand (or on-traffic) if the
// calling application is using the CFSocketStream or higher APIs
if ((flags & kSCNetworkReachabilityFlagsInterventionRequired) == 0)
{
// ... and no [user] intervention is needed
retVal = ReachableViaWiFi;
}
}
if ((flags & kSCNetworkReachabilityFlagsIsWWAN) == kSCNetworkReachabilityFlagsIsWWAN)
{
if ((flags & kSCNetworkReachabilityFlagsReachable) == kSCNetworkReachabilityFlagsReachable) {
if ((flags & kSCNetworkReachabilityFlagsTransientConnection) == kSCNetworkReachabilityFlagsTransientConnection) {
retVal = ReachableVia3G;
if ((flags & kSCNetworkReachabilityFlagsConnectionRequired) == kSCNetworkReachabilityFlagsConnectionRequired) {
retVal = ReachableVia2G;
}
}
}
}
return retVal;
}
//检查当前网络连接是否正常
-( BOOL )connectedToNetWork
{
struct sockaddr_in zeroAddress;
bzero(&zeroAddress, sizeof (zeroAddress));
zeroAddress.sin_len = sizeof (zeroAddress);
zeroAddress.sin_family = AF_INET;
SCNetworkReachabilityRef defaultRouteReachability = SCNetworkReachabilityCreateWithAddress( NULL , ( struct sockaddr *)&zeroAddress);
SCNetworkReachabilityFlags flags;
BOOL didRetrieveFlags = SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags);
CFRelease(defaultRouteReachability);
if (!didRetrieveFlags) {
printf( "Error. Count not recover network reachability flags\n" );
return NO ;
}
BOOL isReachable = flags & kSCNetworkFlagsReachable;
BOOL needsConnection = flags & kSCNetworkFlagsConnectionRequired;
return (isReachable && !needsConnection) ? YES : NO ;
}
//检查网络连接类型
-( void )checkNetworktype:( id )sender{
NSString *connectionKind;
if ([ self connectedToNetWork]) {
hostReach = [Reachability reachabilityWithHostName:@ "www.google.com" ];
switch ([hostReach currentReachabilityStatus]) {
case NotReachable:
connectionKind = @ "没有网络链接" ;
break ;
case ReachableViaWiFi:
connectionKind = @ "当前使用的网络类型是WIFI" ;
break ;
case ReachableVia3G:
connectionKind = @ "当前使用的网络链接类型是WWAN(3G)" ;
break ;
case ReachableVia2G:
connectionKind = @ "当前使用的网络链接类型是WWAN(2G)" ;
break ;
default :
break ;
}
} else {
connectionKind = @ "没有网络链接" ;
}
}
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