iOSReachability判断网络连接状态

//

//  NetStateManage.h

//

//  Created by miniu on 15/11/24.

//  Copyright © 2015年 mini. All rights reserved.

//

#import <Foundation/Foundation.h>

#import "Reachability.h"

@protocol NetStateManageDelegate <NSObject>

@optional

-(void)networkStatusChange:(NetworkStatus)networkStatus;

@end

@interface NetStateManage : NSObject

@property (nonatomic,weak)id <NetStateManageDelegate>delegate;

+ (NetStateManage *)shareInstance;

//当前的网络状态

- (NetworkStatus)currentNetworkStatus;

@end

//

//  NetStateManage.m

//

//  Created by miniu on 15/11/24.

//  Copyright © 2015年 mini. All rights reserved.

//

#import "NetStateManage.h"

@interface NetStateManage ()

{

    Reachability *reachability;

    NetworkStatus hostNetStatus;

}

@end

@implementation NetStateManage

- (instancetype)init

{

    self = [super init];

    

    if (self) {

        //使用Reachability

        [self useReachability];

    }

    

    return self;

}

- (void)useReachability{

    // 监听网络状态改变的通知

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(networkStateChange) name:kReachabilityChangedNotification object:nil];

    

    // 创建Reachability

    reachability = [Reachability reachabilityForInternetConnection];

    // 开始监控网络(一旦网络状态发生改变, 就会发出通知kReachabilityChangedNotification)

    [reachability startNotifier];

}

// 处理网络状态改变

- (void)networkStateChange

{

    // 1.检测wifi状态

    Reachability *wifi = [Reachability reachabilityForLocalWiFi];

    // 2.检测手机是否能上网络(WIFI3G2.5G)

    Reachability *conn = [Reachability reachabilityForInternetConnection];

    // 3.判断网络状态

    if ([wifi currentReachabilityStatus] != NotReachable) { // 有wifi

        NSLog(@"有wifi");

        hostNetStatus=ReachableViaWiFi;

    } else if ([conn currentReachabilityStatus] != NotReachable) { // 没有使用wifi, 使用手机自带网络进行上网

        NSLog(@"使用手机自带网络进行上网");

        hostNetStatus=ReachableViaWWAN;

    }else { // 没有网络

        NSLog(@"没有网络");

        hostNetStatus=NotReachable;

    }

    

    if ([self.delegate respondsToSelector:@selector(networkStatusChange:)]) {

        [self.delegate networkStatusChange:hostNetStatus];

    }

}

+ (NetStateManage *)shareInstance

{

    static NetStateManage *hardwareManager=nil;

    static dispatch_once_t onceToken;

    dispatch_once(&onceToken, ^{

        hardwareManager=[[self alloc] init];

    });

    

    return hardwareManager;

}

//返回当前的网络状态

- (NetworkStatus)currentNetworkStatus

{

    return [reachability currentReachabilityStatus];

}

@end