网络连接判断

方法一：需添加第三方Reachability代码

下载链接：https://developer.apple.com/library/ios/samplecode/Reachability/Introduction/Intro.html

#import "Reachability.h"

#pragma mark 判断当前网络状态
- (BOOL)currntNetworkType
{
        BOOL networking;
        NSString* result;
        
        //    Reachability *r = [Reachability reachabilityWithHostName:@"www.baidu.com"];
        Reachability *r = [Reachability reachabilityForInternetConnection];
        
        switch ([r currentReachabilityStatus])
        {
            case NotReachable:    // 没有网络连接
            {
                result = nil;
                networking = NO;
            }
                break;
                
            case ReachableViaWWAN:// 3G
            {
                result = @"3G";
                networking = YES;
            }
                break;
                
            case ReachableViaWiFi:// WiFi
            {
                result = @"WIFI";
                networking = YES;
            }
                break;
        }
        NSLog(@"==============================现在使用的网络是:%@==================================", result);
        
        return networking;
}

内容来源：http://darrendev.diandian.com/post/2012-10-15/40040914888

 

方法二：利用AFNetworking中的AFNetworkReachabilityManager

#import "AFNetworkReachabilityManager.h"

// AFNetworkReachabilityManager(网络可达性检测)对象
    AFNetworkReachabilityManager *afReach = [AFNetworkReachabilityManager sharedManager];
    // 设置网络状态发生改变时触发的代码块
    [afReach setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
        switch (status) {
            case AFNetworkReachabilityStatusNotReachable:
                // 无网络连接
                break;
            case AFNetworkReachabilityStatusReachableViaWiFi:
                // 通过WiFi连接
                break;
            case AFNetworkReachabilityStatusReachableViaWWAN:
                // 通过WWAN连接
                break;
            default:
                break;
        }
    }];