導(dǎo)入頭文件

#import "Reachability.h"

創(chuàng)建屬性

@property(nonatomic,strong)Reachability *reachli; //網(wǎng)絡(luò)檢測

創(chuàng)建網(wǎng)絡(luò)檢測對象

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    //創(chuàng)建網(wǎng)絡(luò)檢測對象
    self.reachli = [Reachability reachabilityForInternetConnection];

創(chuàng)建通知 并且添加通知

    //創(chuàng)建通知   并且添加通知
    [[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(change) name:kReachabilityChangedNotification object:nil];
    
    //開始監(jiān)聽網(wǎng)絡(luò)狀態(tài)
    [self.reachli startNotifier];
    //調(diào)用change方法
    [self change];
    
}
//接受到通知   網(wǎng)絡(luò)狀態(tài)改變  調(diào)用
-(void)change{
    
    //創(chuàng)建網(wǎng)絡(luò)連接狀態(tài)對象
    NetworkStatus status = [self.reachli currentReachabilityStatus];
    
    //判斷網(wǎng)絡(luò)狀態(tài)
    switch (status) {
        case NotReachable:{
            NSLog(@"沒有網(wǎng)絡(luò)");
            UIAlertView *aler = [[UIAlertView alloc]initWithTitle:@"網(wǎng)絡(luò)提示" message:@"沒有網(wǎng)絡(luò)鏈接" delegate:self cancelButtonTitle:@"確定" otherButtonTitles:nil, nil];
            //展示提示框
            [aler show];
            break;
        }
        case ReachableViaWiFi:{
            NSLog(@"鏈接成功");
            UIAlertView *aler = [[UIAlertView alloc]initWithTitle:@"網(wǎng)絡(luò)提示" message:@"鏈接到Wifi" delegate:self cancelButtonTitle:@"確定" otherButtonTitles:nil, nil];
            //展示提示框
            [aler show];
            break;
            
        }
        case ReachableViaWWAN:{
            NSLog(@"鏈接到蜂窩");
            UIAlertView *aler = [[UIAlertView alloc]initWithTitle:@"網(wǎng)絡(luò)提示" message:@"鏈接到蜂窩" delegate:self cancelButtonTitle:@"確定" otherButtonTitles:nil, nil];
            //展示提示框
            [aler show];
            break;
        }
            
            
            
        default:
            break;
    }
    
}
-(void)dealloc{
    //停止網(wǎng)絡(luò)監(jiān)聽
    [self.reachli stopNotifier];
    //移除通知
    [[NSNotificationCenter defaultCenter]removeObserver:self];
}