NSPort与NSRunloop的关系是流与消息调度的关系

NSPort与NSRunloop的关系是流与消息调度的关系。

NSPort 将流插入到消息调度队列；

相当于 Socket将流插入到应用一样

- (void)launchThread {

NSPort *myport = [NSMachPort port];

if(myport) {

//让本类持有即将到来的端口消息。

[myport setDelegate:self];

//将port添加到当前的runloop

[[NSRunLoop currentRunLoop] addPort:myport forMode:NSDefaultRunLoopMode];

//当前线程调起工作线程

[NSThread detachNewThreadSelector:@selector(LaunchThreadWithPort:) toTarget:[MyWorkerClass new] withObject:myport];

}

}

#pragma mark - port delegate

#define kCheckinMessage 1002233

- (void)handlePortMessage:(NSPortMessage *)message {

NSLog(@"接收到子线程额消息");

//消息的id

uint32_t messageID = message.msgid;

//获取远程端口，也就是工作线程的端口。线程通信需要两个端口？？

/*

* 本地线程和远程线程可以使用相同的端口对象进行“单边通信”，（换句话说）一个线程创建的“本地端口对象”成为另一个线程的“远程端口对象”。

*

*/

NSPort *distanPort = nil;

if(messageID == kCheckinMessage) {

//获取工作线程关联的端口

distanPort = message.sendPort;

}

NSLog(@"工作线程的port===%@",distanPort);

}

- (void)LaunchThreadWithPort:(id)port {

//

[[NSThread currentThread] setName:@"HaoyuWorkerThread"];

//设置当前线程和主线程通信的端口

NSPort *distantPort = (NSPort *)port;

//初始化当前当前类的对象

//MyWorkerClass *work = [MyWorkerClass new];

//给主线程发送消息

[self sendMessageToOtherThread:distantPort];

//启动当前线程的runloop

[[NSRunLoop currentRunLoop] run];

}

//private method

- (void)sendMessageToOtherThread:(NSPort *)outPort {

self.remotePort = outPort;

//创建工作线程自己的端口并绑定工作线程

NSPort* myPort = [NSMachPort port];

[myPort setDelegate:self];

[[NSRunLoop currentRunLoop] addPort:myPort forMode:NSDefaultRunLoopMode];

//创建签到消息

NSPortMessage *messageObjc = [[NSPortMessage alloc] initWithSendPort:outPort receivePort:myPort components:@[@"aa",@"bb"]];

if(messageObjc) {

uint32_t kCheckinMessage = 1002233;

[messageObjc setMsgid:kCheckinMessage];

BOOL sendSuccess = [messageObjc sendBeforeDate:[NSDate date]];

if(sendSuccess) {

NSLog(@"发送成功");

}

}

}

#pragma mark - delegate

- (void)handlePortMessage:(NSPortMessage *)message {

NSLog(@"接收到父线程的消息");

}