IOS开发——网络监测

#import "Reachability.h"//网络监测

@property (strong, nonatomic)Reachability *ymNetwork;

-(void)viewDidLoad
{
[super viewDidLoad];
[self.view setBackgroundColor:[UIColor grayColor]];
//设置通知，网络改变时触发
[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(changeNetwork:) name:kReachabilityChangedNotification object:nil];
//创建Reachability对象
self.ymNetwork = [Reachability reachabilityForInternetConnection];
//开始监听网络
[self.ymNetwork startNotifier];
//获得当前网络
NetworkStatus status = [self.ymNetwork currentReachabilityStatus];
[self checkNetwork:status];
}

#pragma mark - 网络检测
//判断当前是什么网络
-(void)checkNetwork:(NetworkStatus)status{
//没有网的时候进行提示
if (status==kNotReachable) {
[self messageBox:@"没有网络"];
}else if (status==kReachableViaWWAN){
[self messageBox:@"正在使用2G/3G网络"];
}else if (status==kReachableViaWiFi){
[self messageBox:@"正在使用wifi网络"];
}
}
-(void)messageBox:(NSString*)string{
UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"提示"message:string delegate:nil cancelButtonTitle:@"确定"otherButtonTitles:nil,nil];
[alert show];
}
//网络改变时调用
-(void)changeNetwork:(NSNotification*)notification{
//获得当前网络
NetworkStatus status=[self.ymNetwork currentReachabilityStatus];
[self checkNetwork:status];
}