网络初见&网络监测

这里需要下载一个第三方

Reachability-master

大家可以百度一下

下载之后把

Reachability拖进来

具体代码如下

#import "ViewController.h"
#import "Reachability.h"

@interface ViewController ()

@property (nonatomic, strong) Reachability * reach;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    //根据主机名判断网络是否连接
    self.reach=[Reachability reachabilityWithHostName:@"www.baidu.com"];
    //注册网络监听通知
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(reachabilityChanged) name:kReachabilityChangedNotification object:nil];
    //开启监听
    [self.reach startNotifier];
}

- (void)reachabilityChanged {
    
    switch (self.reach.currentReachabilityStatus) {
        case NotReachable:
            NSLog(@"没有网络");
            break;
        case ReachableViaWiFi:
            NSLog(@"WiFi网络");
            break;
        case ReachableViaWWAN:
            NSLog(@"移动蜂窝网");
            break;
        default:
            NSLog(@"未知网络");
            break;
    }

    }
- (void)dealloc {
    
    //把当前的对象所有通知删除

    [[NSNotificationCenter defaultCenter]  removeObserver:self];
    [self.reach stopNotifier];
}