首先导入 Reachability 这个第三方库,在 AppDelegate 中
@property (nonatomic, strong) Reachability *net;
// ------开启网络状况监听
[self startNetMonitor];
然后实现其方法
/**
* 网络检测
*/
// -----------------------------------------------------------------
- (void)startNetMonitor {
// ------开启网络状况监听
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(networkStateChange:) name:kReachabilityChangedNotification object:nil];
self.conn = [Reachability reachabilityWithHostName:@"www.apple.com"];
[self.conn startNotifier];
}
- (void)networkStateChange:(NSNotification *)note
{
Reachability *currReach = [note object];
NSParameterAssert([currReach isKindOfClass:[Reachability class]]);
[self updateInterfaceWithReachability:currReach];
}
- (void) updateInterfaceWithReachability: (Reachability*) curReach
{
NetworkStatus status = [curReach currentReachabilityStatus];
if (status == NotReachable) {
// ------没有网络弹出提示框
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"提示"
message:@"当前网络不可用,请检查网络设置"
preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"好的" style:UIAlertActionStyleDefault handler:nil];
[alertController addAction:cancelAction];
[self.window.rootViewController presentViewController:alertController animated:YES completion:nil];
}
}
