Question

我正在尝试用node-red编码一个功能节点，当从注入节点获取in_array( $userRole, $location['c']为true时，输出为每秒递增1，而当获取msg.paylaod时停止，输出为每秒递增1来自另一个注入节点。它开始提供输出，但是在注入有效载荷“ false”时不会停止。

节点代码：

msg.payload

功能节点代码：

[  
   {  
      "id":"b6c9b219.90a478",
      "type":"function",
      "z":"a3d6aff.bd4935",
      "name":"",
      "func":"var i = 1;\nfunction increment(){\n    i = i + 1;\n    msg={payload:i};\n    node.send(msg);\n   \n}\nif(msg.payload===true){\nvar interval = setInterval( increment, 1000);\nif(msg.payload===false){\n    clearInterval(interval);\n}\n}\n\n",
      "outputs":1,
      "noerr":0,
      "x":700.5,
      "y":581,
      "wires":[  
         [  
            "12f2090c.587347"
         ]
      ]
   },
   {  
      "id":"12f2090c.587347",
      "type":"debug",
      "z":"a3d6aff.bd4935",
      "name":"",
      "active":true,
      "tosidebar":true,
      "console":false,
      "tostatus":false,
      "complete":"true",
      "x":826.5,
      "y":473,
      "wires":[  

      ]
   },
   {  
      "id":"26abbbf.05cf944",
      "type":"inject",
      "z":"a3d6aff.bd4935",
      "name":"",
      "topic":"",
      "payload":"true",
      "payloadType":"bool",
      "repeat":"",
      "crontab":"",
      "once":false,
      "onceDelay":0.1,
      "x":654.88330078125,
      "y":767.2833251953125,
      "wires":[  
         [  
            "b6c9b219.90a478"
         ]
      ]
   },
   {  
      "id":"880341a0.dcab2",
      "type":"inject",
      "z":"a3d6aff.bd4935",
      "name":"",
      "topic":"",
      "payload":"false",
      "payloadType":"bool",
      "repeat":"",
      "crontab":"",
      "once":false,
      "onceDelay":0.1,
      "x":643.88330078125,
      "y":824.0999755859375,
      "wires":[  
         [  
            "b6c9b219.90a478"
         ]
      ]
   }
]

Answer 1

最简单的答案是您不会（轻松）。

执行此操作的更好方法是使函数使用发送multiple messages的格式一次发送序列中的所有消息。然后使用延迟节点对流进行速率限制，以使消息每秒释放一次。

如果您真正需要（确实不需要）按照自己的方式进行操作，则需要将内部计时器保存在context中，并以增量方式获取它函数来调用clearInterval()。

Answer 2

我这样解决了。请看看我的节点代码。还请提出是否可以采用其他更好的方法。

[
  {
    "id": "b6c9b219.90a478",
    "type": "function",
    "z": "a3d6aff.bd4935",
    "name": "",
    "func": "var i = 0;\nfunction increment(){\n    i = i + 1;\n    msg={value:i};\n    node.send(msg);\n    if(global.get(\"a\")===\"off\"){\n    clearInterval(interval);\n    }\n}\n\nif(msg.payload===true){\nvar interval = setInterval( increment, 1000);\n}",
    "outputs": 1,
    "noerr": 0,
    "x": 450.5000305175781,
    "y": 508,
    "wires": [
      [
        "12f2090c.587347"
      ]
    ]
  },
  {
    "id": "12f2090c.587347",
    "type": "debug",
    "z": "a3d6aff.bd4935",
    "name": "",
    "active": true,
    "tosidebar": true,
    "console": false,
    "tostatus": false,
    "complete": "true",
    "x": 699.5,
    "y": 686.9999694824219,
    "wires": []
  },
  {
    "id": "26abbbf.05cf944",
    "type": "inject",
    "z": "a3d6aff.bd4935",
    "name": "",
    "topic": "",
    "payload": "true",
    "payloadType": "bool",
    "repeat": "",
    "crontab": "",
    "once": false,
    "onceDelay": 0.1,
    "x": 305.8833312988281,
    "y": 430.2833557128906,
    "wires": [
      [
        "b6c9b219.90a478",
        "4fdb56dd.8ef"
      ]
    ]
  },
  {
    "id": "880341a0.dcab2",
    "type": "inject",
    "z": "a3d6aff.bd4935",
    "name": "",
    "topic": "",
    "payload": "false",
    "payloadType": "bool",
    "repeat": "",
    "crontab": "",
    "once": false,
    "onceDelay": 0.1,
    "x": 207.88333129882812,
    "y": 666.0999450683594,
    "wires": [
      [
        "4fdb56dd.8ef",
        "b6c9b219.90a478"
      ]
    ]
  },
  {
    "id": "4fdb56dd.8ef",
    "type": "function",
    "z": "a3d6aff.bd4935",
    "name": "",
    "func": "if(msg.payload===false){\n    global.set(\"a\",\"off\");\n}\nif (msg.payload===true){\n    global.set(\"a\",\"on\");\n}\nmsg={payload:global.get(\"a\")}\nreturn msg;",
    "outputs": 1,
    "noerr": 0,
    "x": 202.26666259765625,
    "y": 554.2332458496094,
    "wires": [
      []
    ]
  }
]

如何在node-red ..中的JS中停止setInterval？

2 个答案: