是否有可能检查 iphone 是否通过 Wlan、3g、4g 或 2g 连接？！我知道苹果有一个可达性类，但是你只能检查 Wlan 还是 wwan ......
switch (netStatus)
{
case NotReachable:
{
statusString = @"Access Not Available";
imageView.image = [UIImage imageNamed: @"stop-32.png"] ;
//Minor interface detail- connectionRequired may return yes, even when the host is unreachable. We cover that up here...
connectionRequired= NO;
break;
}
case ReachableViaWWAN:
{
statusString = @"Reachable WWAN";
imageView.image = [UIImage imageNamed: @"WWAN5.png"];
break;
}
case ReachableViaWiFi:
{
statusString= @"Reachable WiFi";
imageView.image = [UIImage imageNamed: @"Airport.png"];
break;
}
}