Question

从Apple example开始，我使用SimplePing检查主机是否可以访问，但是当我使用无法访问的ip进行测试时，其委托方法

- (void)simplePing:(SimplePing *)pinger didFailWithError:(NSError *)error

或

- (void)simplePing:(SimplePing *)pinger didReceivePingResponsePacket:(NSData *)packet

没有被调用，这个委托方法

- (void)simplePing:(SimplePing *)pinger didSendPacket:(NSData *)packet

执行后，任何人遇到这个问题，请帮帮我。以下是我的测试代码：

@property (nonatomic, strong, readwrite) SimplePing *pinger;
@property (weak, nonatomic) IBOutlet UITextField *pingTextField;
@property (weak, nonatomic) IBOutlet UIButton *pingBtn;

- (IBAction)runWithHostName:(id)sender
{
    NSString *hostName = self.pingTextField.text;
    self.pinger = [SimplePing simplePingWithHostName:hostName];

    self.pinger.delegate = (id)self;
    [self.pinger start];
}

- (void)simplePing:(SimplePing *)pinger didStartWithAddress:(NSData *)address {
    [self.pinger sendPingWithData:nil];
}

- (void)simplePing:(SimplePing *)pinger didSendPacket:(NSData *)packet {
    NSLog(@"didSendPacket:");
}

- (void)simplePing:(SimplePing *)pinger didFailWithError:(NSError *)error {
    NSLog(@"didFailWithError: %@", [error description]);
}

- (void)simplePing:(SimplePing *)pinger didFailToSendPacket:(NSData *)packet error:(NSError *)error {
    // Eg they're not connected to any network
    NSLog(@"didFailToSendPacket: %@", [error description]);
}

- (void)simplePing:(SimplePing *)pinger didReceivePingResponsePacket:(NSData *)packet {
    NSLog(@"didReceivePingResponsePacket:");
}

- (void)simplePing:(SimplePing *)pinger didReceiveUnexpectedPacket:(NSData *)packet {
    NSLog(@"didReceiveUnexpectedPacket:");
}

当我ping到无法访问的主机时，日志为：

2014-12-23 11:45:26.933 PingHelper[1733:60695] >CFHostStartInfoResolution
2014-12-23 11:45:27.004 PingHelper[1733:60695] <CFHostStartInfoResolution
2014-12-23 11:45:27.121 PingHelper[1733:60695] >HostResolveCallback
2014-12-23 11:45:27.131 PingHelper[1733:60695] didSendPacket:

当我ping到可访问的主机时，日志是：

2014-12-23 11:52:37.841 PingHelper[1733:60695] >CFHostStartInfoResolution
2014-12-23 11:52:37.876 PingHelper[1733:60695] <CFHostStartInfoResolution
2014-12-23 11:52:37.882 PingHelper[1733:60695] >HostResolveCallback
2014-12-23 11:52:37.903 PingHelper[1733:60695] didSendPacket:
2014-12-23 11:52:37.903 PingHelper[1733:60695] didReceivePingResponsePacket:

ping到无法访问的主机时，SimplePing不起作用

0 个答案: