最近公司项目需要判断手机当前的网络状态是2G/3G/4G还是Wifi，下面说明一下iOS端如何判断：
方法主要有两种，第一种利用苹果官方封装好的Reachability库中，做了一下定制化：
typedefNS_ENUM(NSUInteger,HJNetWorkStatus)
{ZYNetWorkStatusNotReachable= 0,ZYNetWorkStatusUnknown= 1,ZYNetWorkStatusWWAN2G= 2,ZYNetWorkStatusWWAN3G= 3,ZYNetWorkStatusWWAN4G= 4,ZYNetWorkStatusWiFi= 5,
};
#import"Reachability.h"
@property(nonatomic,assign)BOOL isAvaliable;// 当前网络是否可用@property(nonatomic,assign)NSInteger status;// 当前网络状态//发送通知[[NSNotificationCenterdefaultCenter]addObserver:selfselector:@selector(netWorkChanged:) name:kRealReachabilityChangedNotification object:nil];
- (void)netWorkChanged:(NSNotification*)notification{
RealReachability *reachability = (RealReachability *)notification.object;
ReachabilityStatus status = [reachability currentReachabilityStatus];self.isUserReal =YES;switch(status)
{
case RealStatusNotReachable:
self.isAvaliable =NO;
self.status =0;
[self alertMessage:@"No Network"];
break;
case RealStatusViaWiFi:
self.isAvaliable =YES;
self.status =1;
[self alertMessage:@"WIFI"];
break;
case RealStatusViaWWAN:
self.isAvaliable =YES;
self.status =2;
[selfalertMessage:@"2G/3G/4G"];
break;
default:
break;
}
}
