ios 获取网络类型详解手机开发

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; 
}