iOS获取设备网络状态，2G，3G，4G，wifi，非Reachability

+(NSString *)getStatus
{
NSArray *children = [[[[UIApplication
sharedApplication] valueForKeyPath:@"statusBar"]valueForKeyPath:@"foregroundView"]subviews];
NSString *state = [[NSString
alloc]init];
int netType =
0;
//获取到网络返回码
for (id child
in children)
{
if ([child
isKindOfClass:NSClassFromString(@"UIStatusBarDataNetworkItemView")])
{
//获取到状态栏
netType = [[child valueForKeyPath:@"dataNetworkType"]intValue];

switch (netType)
{
case
0:
state = @"无网络";
//无网模式
break;
case
1:
state = @"2G";
break;
case
2:
state = @"3G";
break;
case
3:
state = @"4G";
break;
case
5:
{
state = @"WIFI";
}
break;
default:
{
state = @"未识别网络";
break;
}

}
}
}
return state;
}