首先,引入系統的Reachability類,不知道怎麼引入的話,在Xcode,按下shift+command+0,搜索Reachability,看到圖中所選的工程下載即可。
Apple Reachability
網絡監測
並導入相關.h文件
#import<CoreTelephony/CTTelephonyNetworkInfo.h>
引入後,Reachability.h文件裏面修改NetworkStatus的枚舉,
typedef enum : NSInteger {
NotReachable = 0,
ReachableViaWiFi,
ReachableViaWWAN,
kReachableVia2G,
kReachableVia3G,
kReachableVia4G
} NetworkStatus;
在修改下Reachability.m文件
找到
- (NetworkStatus)networkStatusForFlags:(SCNetworkReachabilityFlags)flags
修改下面的代碼
if ((flags & kSCNetworkReachabilityFlagsIsWWAN) == kSCNetworkReachabilityFlagsIsWWAN)
{
if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0)
{
CTTelephonyNetworkInfo * info = [[CTTelephonyNetworkInfo alloc] init];
NSString *currentRadioAccessTechnology = info.currentRadioAccessTechnology;
if (currentRadioAccessTechnology)
{
if ([currentRadioAccessTechnology isEqualToString:CTRadioAccessTechnologyLTE])
{
returnValue = kReachableVia4G;
}
else if ([currentRadioAccessTechnology isEqualToString:CTRadioAccessTechnologyEdge] || [currentRadioAccessTechnology isEqualToString:CTRadioAccessTechnologyGPRS])
{
returnValue = kReachableVia2G;
}
else
{
returnValue = kReachableVia3G;
}
return returnValue;
}
}
if ((flags & kSCNetworkReachabilityFlagsTransientConnection) == kSCNetworkReachabilityFlagsTransientConnection)
{
if((flags & kSCNetworkReachabilityFlagsConnectionRequired) == kSCNetworkReachabilityFlagsConnectionRequired)
{
returnValue = kReachableVia2G;
return returnValue;
}
returnValue = kReachableVia3G;
return returnValue;
}
returnValue = ReachableViaWWAN;
}
如何使用?
在AppDelegate里加入
Reachability* curReach = [note object];
NSParameterAssert([curReach isKindOfClass: [Reachability class]]);
NetworkStatus status = [curReach currentReachabilityStatus];
switch (status)
{
case NotReachable:
break;
case ReachableViaWiFi:
case ReachableViaWWAN:
break;
case kReachableVia2G:
break;
case kReachableVia3G:
break;
case kReachableVia4G:
break;
}
轉自:http://www.jianshu.com/p/efcfa3c87306