小编ame*_*ing的帖子

我之前问过一个问题，但没有收到任何回复。在这里，我希望进一步缩小范围，希望得到答案。

从 OpenCV 导出光流后，如何计算扩展焦点？

提前致谢 ：）

我正在尝试连接到自定义GCD队列中的服务器.这就是我的做法.

- (void) initNetworkCommunication{
    if(!self.connQueue){
        self.connQueue = dispatch_queue_create("connection_queue", NULL);
    }

    dispatch_async(self.connQueue, ^(void) {
        if(self.inputStream ==nil && self.outputStream ==nil) {
            CFReadStreamRef readStream;
            CFWriteStreamRef writeStream;
            NSString *host= [[NSUserDefaults standardUserDefaults] objectForKey:@"ip_preference"];
            NSNumber *portNum = [[NSUserDefaults standardUserDefaults] objectForKey:@"port_preference"];

            int port = [portNum intValue];
            CFStreamCreatePairWithSocketToHost(NULL, (__bridge CFStringRef)host, port, &readStream, &writeStream);

            CFReadStreamSetProperty(readStream, kCFStreamNetworkServiceType, kCFStreamNetworkServiceTypeVoIP);
            CFWriteStreamSetProperty(writeStream, kCFStreamNetworkServiceType, kCFStreamNetworkServiceTypeVoIP);  

            self.inputStream = (__bridge NSInputStream *)readStream;
            self.outputStream = (__bridge NSOutputStream *)writeStream;
            [self.inputStream setDelegate:self];
            [self.outputStream setDelegate:self];

            [self.inputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSRunLoopCommonModes];
            [self.outputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSRunLoopCommonModes];

            [self.outputStream open];
            [self.inputStream open];
        } else { …