ios 获取网络类型

typedef enum {
NETWORK_TYPE_NONE= 0,
NETWORK_TYPE_WIFI= 1,
NETWORK_TYPE_3G= 2,
NETWORK_TYPE_2G= 3,
}NETWORK_TYPE;
然后通过获取手机信号栏上面的网络类型的标志+ (int)dataNetworkTypeFromStatusBar {

UIApplication *app = [UIApplicationsharedApplication];
NSArray *subviews = [[[app valueForKey:@"statusBar"] valueForKey:@"foregroundView"] subviews];
NSNumber *dataNetworkItemView = nil;

for (id subview in subviews) {
if([subview isKindOfClass:[NSClassFromString(@"UIStatusBarDataNetworkItemView") class]]) {
dataNetworkItemView = subview;
break;
}
}

int netType = NETWORK_TYPE_NONE;
NSNumber * num = [dataNetworkItemView valueForKey:@"dataNetworkType"];
if (num == nil) {

netType = NETWORK_TYPE_NONE;

}else{

int n = [num intValue];
if (n == 0) {
netType = NETWORK_TYPE_NONE;
}elseif (n == 1){
netType = NETWORK_TYPE_2G;
}elseif (n == 2){
netType = NETWORK_TYPE_3G;
}else{
netType = NETWORK_TYPE_WIFI;
}

}

return netType;
}