基于AFNetworking的网络判断【原创】

首先导入AFNetworking第三方框架，然后将下面的.h和.m放在你新建的类中便可

GGNetworkJudge.h   在最后会有Singleton.h头文件代码

#import <Foundation/Foundation.h>
#import "AFNetworkReachabilityManager.h"
#import "Singleton.h" //此处是将一个普通类转化为单例类的头文件

@interface GGNetworkJudge : NSObject

singleton_interface(GGNetworkJudge);

//监测网络状态
- (void)checkNetworkStatus;

@end

GGNetworkJudge.m

#import "GGNetworkJudge.h"
#import <UIKit/UIKit.h>

@implementation GGNetworkJudge
singleton_implementation(GGNetworkJudge);

#pragma mark - 私有方法
#pragma mark 网络状态变化提示
-(void)alert:(NSString *)message{
    UIAlertView *alertView=[[UIAlertView alloc]initWithTitle:@"系统信息" message:message delegate:nil cancelButtonTitle:@"确定" otherButtonTitles: nil];
    [alertView show];
}

#pragma mark 网络状态监测
-(void)checkNetworkStatus{
    
    AFNetworkReachabilityManager *manager = [AFNetworkReachabilityManager sharedManager];
    
    //开始监控
    [manager startMonitoring];

    
    // 检测网络连接的单例,网络变化时的回调方法
    [manager setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
        
        switch (status) {
            case AFNetworkReachabilityStatusReachableViaWWAN:
                //[self alert:@"2G/3G/4G Connection."];
                [self alert:@"网络已连接"];

                break;
            case AFNetworkReachabilityStatusReachableViaWiFi:
                // [self alert:@"WiFi Connection."];
                
                [self alert:@"网络已连接"];
                break;
            case AFNetworkReachabilityStatusNotReachable:
                //  [self alert:@"Network not found."];
                [self alert:@"网络已断开，请检查网络设置"];

                
                break;
                
            default:
                // [self alert:@"Unknown."];
                [self alert:@"网络未知错误"];

                break;

        }
        
    }];
    
    
    


}


@end

Singleton.h

/*
专门用来保存单例代码
 最后一行不要加  
*/

// @interface
#define singleton_interface(className) 
+ (className *)shared##className;


// @implementation
#define singleton_implementation(className) 
static className *_instance; 
+ (id)allocWithZone:(NSZone *)zone 
{ 
    static dispatch_once_t onceToken; 
    dispatch_once(&onceToken, ^{ 
        _instance = [super allocWithZone:zone]; 
    }); 
    return _instance; 
} 
+ (className *)shared##className 
{ 
    static dispatch_once_t onceToken; 
    dispatch_once(&onceToken, ^{ 
        _instance = [[self alloc] init]; 
    }); 
    return _instance; 
}