Objective c NSNetServiceBrowser找不到存在的服务

我有一个定制的Cocoa（OSX）服务器和客户端，服务器发布了一个bonjour服务。我让客户端使用

NSNetServiceBrowser

搜索服务器，但从未得到任何结果。我知道该服务已发布，因为它位于

mdns-B\u myservicecype.\u tcp

的输出中。我的搜索和发布代码使用相同的域名、名称和类型进行搜索和发布，与Apple示例代码几乎相同。以下是发布代码：

service = [[NSNetService alloc] initWithDomain:@"" type:@"_scijs._tcp" name:@"ScienceJeopardyServer" port:4567];
[service publish];

以下是搜索和委派方法：

[sbrows setDelegate:self];
[sbrows searchForServicesOfType:@"_scijs._tcp" inDomain:@""];

-(void)netServiceBrowserWillSearch:(NSNetServiceBrowser *)aNetServiceBrowser {
    [self.statusLabel setStringValue:@"Searching for server..."];
    [self.serverIndicator setHidden:NO];
    [self.serverIndicator startAnimation:self];
}

-(void)netServiceBrowser:aNetServiceBrowser didNotSearch:(NSDictionary *)errorDict {
    [self.statusLabel setStringValue:@"Error finding server."];
    [self.serverIndicator stopAnimation:self];
    [self.serverIndicator setHidden:YES];
}

-(void)netServiceBrowserDidStopSearch:(NSNetServiceBrowser *)aNetServiceBrowser {
    [self.serverIndicator stopAnimation:self];
    [self.serverIndicator setHidden:YES];
}

-(void)netServiceBrowser:(NSNetServiceBrowser *)aNetServiceBrowser didFindService:(NSNetService *)aNetService moreComing:(BOOL)moreComing {
    [aNetServiceBrowser stop];
    NSLog(@"Found server.");
    [self.statusLabel setStringValue:@"Resolving service..."];
    [aNetService setDelegate:self];
    [aNetService resolveWithTimeout:10.0];
}

以下是委托方法：

[sbrows setDelegate:self];
[sbrows searchForServicesOfType:@"_scijs._tcp" inDomain:@""];

-(void)netServiceBrowserWillSearch:(NSNetServiceBrowser *)aNetServiceBrowser {
    [self.statusLabel setStringValue:@"Searching for server..."];
    [self.serverIndicator setHidden:NO];
    [self.serverIndicator startAnimation:self];
}

-(void)netServiceBrowser:aNetServiceBrowser didNotSearch:(NSDictionary *)errorDict {
    [self.statusLabel setStringValue:@"Error finding server."];
    [self.serverIndicator stopAnimation:self];
    [self.serverIndicator setHidden:YES];
}

-(void)netServiceBrowserDidStopSearch:(NSNetServiceBrowser *)aNetServiceBrowser {
    [self.serverIndicator stopAnimation:self];
    [self.serverIndicator setHidden:YES];
}

-(void)netServiceBrowser:(NSNetServiceBrowser *)aNetServiceBrowser didFindService:(NSNetService *)aNetService moreComing:(BOOL)moreComing {
    [aNetServiceBrowser stop];
    NSLog(@"Found server.");
    [self.statusLabel setStringValue:@"Resolving service..."];
    [aNetService setDelegate:self];
    [aNetService resolveWithTimeout:10.0];
}

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大部分只是GUI代码和NSlog，但我从未得到GUI更改或NSlog。有人有解决方案吗？

很可能是在您的客户中

在委托方法中设置断点

确保

sbrows

未超出范围。如果它不在范围内，将调用搜索，则不会调用其他响应

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非常感谢，这是一个涉及范围的微妙问题+1、接受！那你是怎么解决的？我也有同样的问题。