• 從官網(wǎng)出下載Reachability.h/m文件,拖入工程

• 調(diào)用Reachability.h頭文件,并創(chuàng)建全局變量Reachability *internetReachability;

• 在AppDelegate的- (BOOL)application:(UIApplication )application didFinishLaunchingWithOptions:(NSDictionary )launchOptions方法中創(chuàng)建通知

 //添加一個(gè)系統(tǒng)通知
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(reachabilityChanged:) name:kReachabilityChangedNotification object:nil];
    //初始化
    internetReachability=[Reachability reachabilityForInternetConnection];
    //通知添加到Run Loop
    [internetReachability startNotifier];
    [self updateInterfaceWithReachability:internetReachability];

• 實(shí)現(xiàn)通知方法

- (void) reachabilityChanged:(NSNotification *)note
{
    Reachability* curReach = [note object];
    NSParameterAssert([curReach isKindOfClass:[Reachability class]]);
    [self updateInterfaceWithReachability:curReach];
}

• 監(jiān)測(cè)網(wǎng)絡(luò)狀態(tài)方法

- (void)updateInterfaceWithReachability:(Reachability *)reachability
{
    NetworkStatus netStatus = [reachability currentReachabilityStatus];
    switch (netStatus) {
        case NotReachable:
            NSLog(@"====當(dāng)前網(wǎng)絡(luò)狀態(tài)不可用=======");
            break;
        case ReachableViaWiFi:
            NSLog(@"====當(dāng)前網(wǎng)絡(luò)狀態(tài)為Wifi=======");
            break;
        case ReachableViaWWAN:
            NSLog(@"====當(dāng)前網(wǎng)絡(luò)狀態(tài)為流量=======keso");
            break;
    }
}

注:

• 此方法能監(jiān)測(cè)所有頁(yè)面的網(wǎng)絡(luò)狀態(tài),可是要在當(dāng)前頁(yè)面獲取當(dāng)前網(wǎng)絡(luò)狀態(tài)則需要使用AFNetWorking,如果不嫌麻煩那就一個(gè)一個(gè)寫.