Objective-c中线程NSThread的使用

NSThread使用

1.创建并启动线程

thread = [[NSThread alloc]initWithTarget:self selector:@selector(startMonitor) object:nil];[thread start];

2.停止线程

    先向线程发送cancel消息，将线程标记为停止，然后在合适的地方判断线程是否标记为退出，如果是，则发送exit消息，真正退出线程

- (void)getInfo:(id)sender{      if (!running) {        NSLog(@"start monitor");        thread = [[NSThread alloc]initWithTarget:self selector:@selector(startMonitor) object:nil];        [thread start];        running = true;    }    else{        NSLog(@"stop monitor");        [thread cancel];        running = false;    }}- (void) startMonitor{    while (true) {        if ([[NSThread currentThread] isCancelled]) {            [NSThread exit];        }        //do your things here        sleep(1);    };}