iOS網路檢測Reachability 使用 Demo，可檢測2、3、4G，iosreachability

iOS網路檢測Reachability 使用 Demo，可檢測2、3、4G，iosreachability

你可以在Github下載這個Demo https://github.com/JanzTam/Reachability_Demo

 

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，搜尋Reachability，看到圖中所選的工程下載即可。

Reachability.png並匯入相關.h檔案#import<CoreTelephony/CTTelephonyNetworkInfo.h>

引入後，Reachability.h檔案裡面修改NetworkStatus的枚舉，

typedef enum : NSInteger {    NotReachable = 0,    ReachableViaWiFi,    ReachableViaWWAN,    kReachableVia2G,    kReachableVia3G,    kReachableVia4G} NetworkStatus;

在修改下Reachability.m檔案
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裡加入

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{    //設定狀態列    [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleDefault];    // 監測網路情況    [[NSNotificationCenter defaultCenter] addObserver:self                                             selector:@selector(reachabilityChanged:)                                                 name: kReachabilityChangedNotification                                               object: nil];    hostReach = [Reachability reachabilityWithHostName:@"www.baidu.com"];    [hostReach startNotifier];}

- (void)reachabilityChanged:(NSNotification *)note{    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;    }}