Rechability的简单使用

AppDelegate.m

#import "AppDelegate.h"

#import "Reachability.h"

@interface AppDelegate ()

@property (nonatomic, strong) Reachability *reachability;

@end

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

{

    // 监听网络状态的改变

    [self networkChange];

    return YES;

}

// 监听网络变化

- (void)networkChange

{

    // 开启网络状况的监听通知

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

    // 监听的链接

    self.reachability = [Reachability reachabilityWithHostName:@"www.baidu.com"];

    // 开始监听, 会启动一个Runloop

    [self.reachability startNotifier];

}

// 网络链接改变时会调用的方法

- (void)reachabilityChanged:(NSNotification *)note

{

    // 通过通知对象获取被监听的Reachability对象

    Reachability *currReach = [note object];

    NSAssert([currReach isKindOfClass:[Reachability class]], @"非Reachability类");

    //对连接改变做出响应处理动作

    NetworkStatus status = [currReach currentReachabilityStatus];

    //如果没有连接到网络就提醒实况

    if(status == NotReachable) {

        NSLog(@"AppDelegate - 网络连接异常");

        [[NSNotificationCenter defaultCenter] postNotificationName:@"networkChangeNotification" object:nil userInfo:@{@"networkStatusKey" : @(NO)}];

    } else {

        NSLog(@"AppDelegate - 网络连接正常");

        [[NSNotificationCenter defaultCenter] postNotificationName:@"networkChangeNotification" object:nil userInfo:@{@"networkStatusKey" : @(YES)}];

    }

}

@end

ViewController.m

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    // 监听网络状态

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(networkChange:) name:@"networkChangeNotification" object:nil];

}

- (void)dealloc

{

    [[NSNotificationCenter defaultCenter] removeObserver:self];

}

- (void)networkChange:(NSNotification *)notification

{

    NSString *status = notification.userInfo[@"networkStatusKey"];

    if (status.boolValue) {         // 断网切换为正常状态

        NSLog(@"断网切换为正常状态");

    } else {                        // 正常切换为断网状态

        NSLog(@"正常切换为断网状态");

    }

}

@end

Demo:

https://github.com/RinpeChen/RechabilityDemoByRinpe