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# ROS基础笔记
##### 1.1 `ros::Rate`的用法
`ros::Rate` 是ROS中用于控制循环频率的工具。在你提到的代码中`ros::Rate loop_rate(10);` 创建了一个 `ros::Rate` 对象,其目的是控制循环的频率。
```c++
ros::Rate loop_rate(10); // 设置事件循环的频率为10Hz
while (ros::ok()) {
// 处理其他任务,这个地方不能处理过于耗时的操作
ros::spinOnce(); // 处理一次事件循环
loop_rate.sleep(); // 使节点等待足够的时间以达到设定的频率
}
```