[讨论]Qt iOS 后台如何保持socket长连接？？？ [复制链接]

Objective-C 通过设置流属性kCFStreamNetworkServiceTypeVoIP保持长连接，Qt后台如何实现长连接？

使用Qt的sockets想保持长连接是不可能的，移动端手机的机制是不会允许的，只要你app后台后 过段时间会被阻塞，这样你的长连接会被中断，只有服务才可以使用

办法解决分为两步：
1.修改plist的一个属性Voice over IP" in xxx .plist file.
2.集成native code 类似以下
driver = ProxyDriver::getInstance(5150);
    NSLog(@"Socket descriptor %i" , driver->socketDescriptor());
    CFReadStreamRef readStream;
    CFWriteStreamRef writeStream;

CFStreamCreatePairWithSocket (kCFAllocatorDefault, driver->socketDescriptor(),  &readStream, &writeStream);
CFReadStreamSetProperty(readStream, kCFStreamNetworkServiceType, kCFStreamNetworkServiceTypeVoIP);
CFWriteStreamSetProperty(writeStream, kCFStreamNetworkServiceType, kCFStreamNetworkServiceTypeVoIP);

toby520:
办法解决分为两步：
1.修改plist的一个属性Voice over IP" in xxx .plist file.
2.集成native code 类似以下
driver = ProxyDriver::getInstance(5150);
    NSLog(@"Socket descriptor %i" , driver->socketDescriptor());
.......

    按你说的做了，但在后台时socket仍然接收不到数据，函数在.mm文件里，代码是这样的：
    CFReadStreamRef readStream;
    CFWriteStreamRef writeStream;
    CFStreamCreatePairWithSocket (kCFAllocatorDefault, (CFSocketNativeHandle)socketDescriptor,  &readStream, &writeStream);
    CFReadStreamSetProperty(readStream, kCFStreamNetworkServiceType, kCFStreamNetworkServiceTypeVoIP);
    CFWriteStreamSetProperty(writeStream, kCFStreamNetworkServiceType, kCFStreamNetworkServiceTypeVoIP);

   socketDescriptor是QTcpSocket连接服务器成功后的socket，而且CFReadStreamSetProperty和CFWriteStreamSetProperty调用成功了，想不明白？