{"id":3316,"date":"2021-01-13T15:43:25","date_gmt":"2021-01-13T07:43:25","guid":{"rendered":"http:\/\/www.salesforcecrm.cn\/?p=3316"},"modified":"2021-01-13T15:43:25","modified_gmt":"2021-01-13T07:43:25","slug":"%e5%9c%a8%e9%97%aa%e7%94%b5web%e7%bb%84%e4%bb%b6%e4%b9%8b%e9%97%b4%e9%80%9a%e4%bf%a1-%e5%9c%a8%e4%b8%8d%e7%9b%b8%e5%85%b3%e7%9a%84%e7%bb%84%e4%bb%b6%e4%b9%8b%e9%97%b4%e9%80%9a%e4%bf%a1","status":"publish","type":"post","link":"http:\/\/www.ponybai.com\/?p=3316","title":{"rendered":"\u5728\u95ea\u7535Web\u7ec4\u4ef6\u4e4b\u95f4\u901a\u4fe1 – \u5728\u4e0d\u76f8\u5173\u7684\u7ec4\u4ef6\u4e4b\u95f4\u901a\u4fe1"},"content":{"rendered":"

\u5728\u4e0d\u76f8\u5173\u7684\u7ec4\u4ef6\u4e4b\u95f4\u901a\u4fe1<\/span><\/h1>\n
\n

\u8981\u5728DOM\u4e2d\u7684\u5b50\u6811\u4e4b\u95f4\u901a\u4fe1\uff08\u4ee5\u53ca\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u767b\u5f55\u5230\u540c\u4e00\u7ec4\u7ec7\u7684\u4e0d\u540c\u6d4f\u89c8\u5668\u7a97\u53e3\u4e4b\u95f4\u7684\u901a\u4fe1\uff09\uff0c\u8bf7\u4f7f\u7528\u95ea\u7535\u6d88\u606f\u670d\u52a1\uff08LMS\uff09\u3002LMS\u662f\u4e00\u9879\u53d1\u5e03\u548c\u8ba2\u9605\u670d\u52a1\uff0c\u53ef\u4fc3\u8fdbLightning Web\u7ec4\u4ef6\uff0cAura\u7ec4\u4ef6\u548cVisualforce\u9875\u9762\u4e4b\u95f4\u7684\u901a\u4fe1\u3002 \u00a0<\/span><\/p>\n

\u9664\u975e\u60a8\u540c\u65f6\u63a7\u5236\u4e24\u4e2a\u7ec4\u4ef6\u548c\u4e00\u4e2a\u516c\u5171\u7236\u7ec4\u4ef6\uff0c\u5426\u5219\u8bf7\u4f7f\u7528LMS\u8fdb\u884c\u4e0d\u76f8\u5173\u7ec4\u4ef6\u4e4b\u95f4\u7684\u901a\u4fe1\u3002LMS\u529f\u80fd\u5f3a\u5927\uff0c\u6709\u6548\u4e14\u6613\u4e8e\u4f7f\u7528\uff0c\u4f46\u4e0d\u8981\u5728\u4e0d\u5fc5\u8981\u65f6\u8bf1\u4f7f\u60a8\u4f7f\u7528\u5b83\u3002\u89e6\u53d1DOM\u4e8b\u4ef6\u6548\u7387\u66f4\u9ad8\u3002\u5f53\u60a8\u9700\u8981\u4e0e\u65e0\u6cd5\u63a7\u5236\u7684\u7236\u7ea7\uff08\u4f8b\u5982\u4e24\u4e2aApp Builder\u63d2\u69fd\uff09\u5728\u7ec4\u4ef6\u4e4b\u95f4\u8fdb\u884c\u901a\u4fe1\u65f6\uff0cLightning\u6d88\u606f\u670d\u52a1\u662f\u7406\u60f3\u7684\u9009\u62e9\u3002<\/span><\/p>\n

\"LMS\u901a\u4fe1\u56fe\u663e\u793a\u4e86\u4e00\u4e2a\u6587\u6863\u5bf9\u8c61\uff0c\u8be5\u5bf9\u8c61\u5305\u542b\u591a\u4e2a\u5143\u7d20\uff0c\u5305\u62ec\u7236\u5143\u7d20\u4e2d\u7684\u4e00\u4e2a\u5143\u7d20\u3002<\/p>\n

\u7b2c\u4e09\u4e2a\u4e1a\u52a1\u90e8\u95e8\u5e0c\u671b\u53c2\u4e0e\u53f7\u7801\u5904\u7406\u9879\u76ee\u3002\u4ed6\u4eec\u9700\u8981\u201c\u4f18\u5148\u8ba1\u6570\u201d\u548c\u201c\u8ba1\u6570\u201d\u5728\u81ea\u5df1\u7684\u7ec4\u4ef6\u4e2d\u5728\u4e00\u8d77\uff0c\u4ee5\u4fbf\u53ef\u4ee5\u5728\u9700\u8981\u7684\u5730\u65b9\u663e\u793a\u5b83\u4eec\u3002\u8ba9\u6211\u4eec\u4ece\u521b\u5efa\u6d88\u606f\u901a\u9053\u5f00\u59cb\uff0c\u4ee5\u4fbf\u4e3a\u7ec4\u4ef6\u4f7f\u7528\u505a\u597d\u51c6\u5907\u3002<\/span><\/p>\n

\"\u540d\u4e3aremoteControl\u7684\u7ec4\u4ef6\u5c06\u4fe1\u606f\u53d1\u9001\u5230\u4e0d\u76f8\u5173\u7684\u540d\u4e3acounts\u7684\u7ec4\u4ef6\u3002\"<\/p>\n

\u521b\u5efa\u95ea\u7535\u6d88\u606f\u901a\u9053<\/span><\/h2>\n
    \n
  1. \u5728Visual Studio Code\u7684<\/span>\u9ed8\u8ba4<\/span><\/strong>\u6587\u4ef6\u5939\u4e2d\uff0c\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a\u7684\u6587\u4ef6\u5939\u00a0<\/span>messageChannels<\/code>\u3002<\/span><\/li>\n
  2. \u5728<\/span>messageChannels<\/span><\/strong>\u6587\u4ef6\u5939\u4e2d\uff0c\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a\u7684\u6587\u4ef6\u00a0<\/span>Count_Updated.messageChannel-meta.xml<\/code>\u3002<\/span><\/li>\n
  3. \u5728<\/span>Count_Updated.messageChannel-meta.xml\u4e2d<\/span><\/strong>\uff0c\u7c98\u8d34\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/span>\n
    \n
    <<\/span>?<\/span>xml version=<\/span>\"1.0\"<\/span> encoding=<\/span>\"UTF-8\"<\/span> ?<\/span>><\/span>\n<<\/span>LightningMessageChannel<\/span> xmlns=<\/span>\"http:\/\/soap.sforce.com\/2006\/04\/metadata\"<\/span>><\/span>\n    <<\/span>masterLabel><\/span><\/span>CountUpdated<\/span><<\/span>\/<\/span>masterLabel><\/span>\n    <<\/span>isExposed><\/span><\/span>true<\/span><<\/span>\/<\/span>isExposed><\/span>\n    <<\/span>description><\/span><\/span>Message<\/span> Channel<\/span> to<\/span> pass<\/span> Count<\/span> updates<<\/span>\/<\/span>description><\/span>\n     <<\/span>lightningMessageFields><\/span><\/span>\n        <<\/span>fieldName><\/span><\/span>operator<<\/span>\/<\/span>fieldName><\/span>\n        <<\/span>description><\/span><\/span>This<\/span> is the operator type of the manipulation<<\/span>\/<\/span>description><\/span>\n    <<\/span>\/<\/span>lightningMessageFields><\/span>\n    <<\/span>lightningMessageFields><\/span><\/span>\n         <<\/span>fieldName><\/span><\/span>constant<<\/span>\/<\/span>fieldName><\/span>\n        <<\/span>description><\/span><\/span>This<\/span> is the number for<\/span> the manipulation<<\/span>\/<\/span>description><\/span>\n     <<\/span>\/<\/span>lightningMessageFields><\/span>\n<<\/span>\/<\/span>LightningMessageChannel<\/span>><\/span><\/code><\/pre>\n
    \n
    <\/div>\n<\/div>\n<\/div>\n<\/li>\n
  4. \u4fdd\u5b58\u5e76\u90e8\u7f72\u6587\u4ef6\u3002<\/span><\/li>\n<\/ol>\n
    \u521b\u5efa\u53d1\u5e03\u8005\u7ec4\u4ef6<\/span><\/h2>\n
      \n
    1. \u521b\u5efa\u540d\u4e3a\u7684Lightning Web\u7ec4\u4ef6<\/span>remoteControl<\/code>\u3002<\/span><\/li>\n
    2. \u7528\u4ee5\u4e0b\u4ee3\u7801\u66ff\u6362<\/span>remoteControl.js<\/span><\/strong>\u7684\u5185\u5bb9\uff1a<\/span>\n
      \n
      import<\/span> {<\/span> LightningElement<\/span>,<\/span> wire }<\/span> from 'lwc'<\/span>;<\/span>\nimport<\/span> {<\/span> publish,<\/span> MessageContext<\/span> }<\/span> from 'lightning\/messageService'<\/span>;<\/span>\nimport<\/span> COUNT_UPDATED_CHANNEL from '@salesforce\/messageChannel\/Count_Updated__c'<\/span>;<\/span>\n  \nexport default<\/span> class<\/span> RemoteControl<\/span> extends<\/span> LightningElement<\/span> {<\/span>\n  \n  @wire<\/span>(<\/span>MessageContext<\/span>)<\/span>\n  messageContext;<\/span>\n  \n  handleIncrement<\/span>(<\/span>)<\/span> {<\/span>\n    \/\/ this.counter++;<\/span>\n    const<\/span> payload =<\/span> {<\/span> \n      operator:<\/span> 'add'<\/span>,<\/span>\n      constant:<\/span> 1<\/span>\n    }<\/span>;<\/span>\n  \n    publish<\/span>(<\/span>this<\/span>.<\/span>messageContext,<\/span> COUNT_UPDATED_CHANNEL,<\/span> payload)<\/span>;<\/span>\n  }<\/span>\n  \n  handleDecrement<\/span>(<\/span>)<\/span> {<\/span>\n    \/\/ this.counter--;<\/span>\n    const<\/span> payload =<\/span> {<\/span> \n      operator:<\/span> 'subtract'<\/span>,<\/span>\n      constant:<\/span> 1<\/span>\n    }<\/span>;<\/span>\n  \n    publish<\/span>(<\/span>this<\/span>.<\/span>messageContext,<\/span> COUNT_UPDATED_CHANNEL,<\/span> payload)<\/span>;<\/span>\n  }<\/span>\n  \n  handleMultiply<\/span>(<\/span>event)<\/span> {<\/span>\n    const<\/span> factor =<\/span> event.<\/span>detail;<\/span>\n     \/\/ this.counter *= factor;<\/span>\n    const<\/span> payload =<\/span> {<\/span> \n      operator:<\/span> 'multiply'<\/span>,<\/span>\n      constant:<\/span> factor\n    }<\/span>;<\/span>\n  \n    publish<\/span>(<\/span>this<\/span>.<\/span>messageContext,<\/span> COUNT_UPDATED_CHANNEL,<\/span> payload)<\/span>;<\/span>\n  }<\/span>\n}<\/span><\/code><\/pre>\n
      \n
      <\/div>\n<\/div>\n<\/div>\n
      \u6211\u4eec\u8fdb\u53e3<\/span>publish<\/code>\u548c<\/span>MessageContext<\/code>\u4ece\u95ea\u7535\u6d88\u606f\u670d\u52a1\u3002\u6211\u4eec\u8fd8\u5bfc\u5165\u521a\u521a\u521b\u5efa\u7684\u9891\u9053\uff08<\/span>Count_Updated__c<\/code>\uff09\u3002\u6570\u636e\u6709\u6548\u8f7d\u8377\u4e0e\u8be5<\/span>publish<\/code>\u529f\u80fd\u4e00\u8d77\u53d1\u9001\u3002<\/span><\/li>\n
    3. \u4fdd\u5b58\u6587\u4ef6\u3002<\/span><\/li>\n
    4. \u6253\u5f00<\/span>remoteControl.html<\/span><\/strong>\u5e76\u5728<\/span>template<\/code>\u00a0\u6807\u7b7e\u4e4b\u95f4\u6dfb\u52a0\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/span>\n
      \n
        <<\/span>lightning-<\/span>card title=<\/span>\"Remote Control\"<\/span> icon-<\/span>name=<\/span>\"action:change_record_type\"<\/span>><\/span>\n    <<\/span>c-<\/span>controls\n      class<\/span>=<\/span>\"slds-show slds-is-relative\"<\/span>\n      onadd=<\/span>{<\/span>handleIncrement}<\/span>\n      onsubtract=<\/span>{<\/span>handleDecrement}<\/span>\n      onmultiply=<\/span>{<\/span>handleMultiply}<\/span>><\/span>\n    <<\/span>\/<\/span>c-<\/span>controls><\/span>\n  <<\/span>\/<\/span>lightning-<\/span>card><\/span><\/code><\/pre>\n
      \n
      <\/div>\n<\/div>\n<\/div>\n
      \u6ce8\u610f\uff0c\u6211\u4eec\u6b63\u5728\u91cd\u65b0\u4f7f\u7528\u63a7\u4ef6\u7ec4\u4ef6\u3002<\/span><\/li>\n
    5. \u4fdd\u5b58\u6587\u4ef6\u3002<\/span><\/li>\n
    6. \u66f4\u65b0<\/span>remoteControl.js-meta.xml\uff0c<\/span><\/strong>\u4ee5\u4f7fremoteControl\u7ec4\u4ef6\u5728Lightning\u5e94\u7528\u7a0b\u5e8f\u9875\u9762\u4e0a\u53ef\u7528\uff1a<\/span>\n
      \n
          <<\/span>isExposed><\/span><\/span>true<\/span><<\/span>\/<\/span>isExposed><\/span>\n    <<\/span>targets><\/span><\/span>\n        <<\/span>target><\/span><\/span>lightning__AppPage<<\/span>\/<\/span>target><\/span>\n    <<\/span>\/<\/span>targets><\/span><\/code><\/pre>\n
      \n
      <\/div>\n<\/div>\n<\/div>\n<\/li>\n
    7. \u4fdd\u5b58\u6587\u4ef6\u3002<\/span><\/li>\n<\/ol>\n
      \u521b\u5efa\u8ba2\u6237\u7ec4\u4ef6<\/span><\/h2>\n
        \n
      1. \u521b\u5efa\u540d\u4e3a\u7684Lightning Web\u7ec4\u4ef6<\/span>counts<\/code>\u3002<\/span><\/li>\n
      2. \u7528\u4ee5\u4e0b\u4ee3\u7801\u66ff\u6362<\/span>counts.js<\/span><\/strong>\u7684\u5185\u5bb9\uff1a<\/span>\n
        \n
        import<\/span> {<\/span> LightningElement<\/span>,<\/span> wire }<\/span> from 'lwc'<\/span>;<\/span>\nimport<\/span> {<\/span> subscribe,<\/span> MessageContext<\/span> }<\/span> from 'lightning\/messageService'<\/span>;<\/span>\nimport<\/span> COUNT_UPDATED_CHANNEL from '@salesforce\/messageChannel\/Count_Updated__c'<\/span>;<\/span>\n  \nexport default<\/span> class<\/span> Counts<\/span> extends<\/span> LightningElement<\/span> {<\/span>\n  subscription =<\/span> null<\/span>;<\/span>\n  priorCount =<\/span> 0<\/span>;<\/span>\n  counter =<\/span> 0<\/span>;<\/span>\n  \n  @wire<\/span>(<\/span>MessageContext<\/span>)<\/span>\n  messageContext;<\/span>\n  \n  subscribeToMessageChannel<\/span>(<\/span>)<\/span> {<\/span>\n    this<\/span>.<\/span>subscription =<\/span> subscribe<\/span>(<\/span>\n      this<\/span>.<\/span>messageContext,<\/span>\n      COUNT_UPDATED_CHANNEL,<\/span>\n      (<\/span>message)<\/span> =<\/span>><\/span> this<\/span>.<\/span>handleMessage<\/span>(<\/span>message)<\/span>\n    )<\/span>;<\/span>\n  }<\/span>\n  \n  handleMessage<\/span>(<\/span>message)<\/span> {<\/span>\n    this<\/span>.<\/span>priorCount =<\/span> this<\/span>.<\/span>counter;<\/span>\n    if<\/span>(<\/span>message.<\/span>operator ==<\/span> 'add'<\/span>)<\/span> {<\/span>\n      this<\/span>.<\/span>counter +=<\/span> message.<\/span>constant;<\/span>\n    }<\/span>else<\/span> if<\/span>(<\/span>message.<\/span>operator ==<\/span> 'subtract'<\/span>)<\/span> {<\/span>\n      this<\/span>.<\/span>counter -=<\/span> message.<\/span>constant;<\/span>\n    }<\/span> else<\/span> {<\/span>\n      this<\/span>.<\/span>counter *=<\/span> message.<\/span>constant;<\/span>\n    }<\/span>\n  }<\/span>\n  \n  connectedCallback<\/span>(<\/span>)<\/span> {<\/span>\n    this<\/span>.<\/span>subscribeToMessageChannel<\/span>(<\/span>)<\/span>;<\/span>\n  }<\/span>\n}<\/span><\/code><\/pre>\n
        \n
        <\/div>\n<\/div>\n<\/div>\n
        @wire(MessageContext)<\/code>\u786e\u4fdd<\/span>unsubscribe<\/code>\u5728\u7ec4\u4ef6\u9500\u6bc1\u751f\u547d\u5468\u671f\u5185\u8fd0\u884c\u3002<\/span><\/li>\n
      3. \u4fdd\u5b58\u6587\u4ef6\u3002<\/span><\/li>\n
      4. \u6253\u5f00<\/span>counts.html<\/span><\/strong>\u5e76\u5728<\/span>template<\/code>\u6807\u7b7e\u4e4b\u95f4\u6dfb\u52a0\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/span>\n
        \n
          <<\/span>lightning-<\/span>card title=<\/span>\"Counts\"<\/span> icon-<\/span>name=<\/span>\"action:change_record_type\"<\/span>><\/span>\n    <<\/span>p class<\/span>=<\/span>\"slds-text-align_center slds-var-m-vertical_medium\"<\/span>><\/span>\n      Prior<\/span> Count<\/span>:<\/span> <<\/span>lightning-<\/span>formatted-<\/span>number value=<\/span>{<\/span>priorCount}<\/span>><\/span><<\/span>\/<\/span>lightning-<\/span>formatted-<\/span>number><\/span>\n    <<\/span>\/<\/span>p><\/span>\n    <<\/span>p class<\/span>=<\/span>\"slds-text-align_center slds-var-m-vertical_medium\"<\/span>><\/span>\n      Count<\/span>:<\/span> <<\/span>lightning-<\/span>formatted-<\/span>number value=<\/span>{<\/span>counter}<\/span>><\/span><<\/span>\/<\/span>lightning-<\/span>formatted-<\/span>number><\/span>\n    <<\/span>\/<\/span>p><\/span>\n  <<\/span>\/<\/span>lightning-<\/span>card><\/span><\/code><\/pre>\n
        \n
        <\/div>\n<\/div>\n<\/div>\n<\/li>\n
      5. \u4fdd\u5b58\u6587\u4ef6\u3002<\/span><\/li>\n
      6. \u66f4\u65b0<\/span>counts.js-meta.xml\uff0c<\/span><\/strong>\u4ee5\u4f7f\u8ba1\u6570\u7ec4\u4ef6\u5728Lightning\u5e94\u7528\u7a0b\u5e8f\u9875\u9762\u4e2d\u53ef\u7528\uff1a<\/span>\n
        \n
            <<\/span>isExposed><\/span><\/span>true<\/span><<\/span>\/<\/span>isExposed><\/span>\n    <<\/span>targets><\/span><\/span>\n        <<\/span>target><\/span><\/span>lightning__AppPage<<\/span>\/<\/span>target><\/span>\n    <<\/span>\/<\/span>targets><\/span><\/code><\/pre>\n
        \n
        <\/div>\n<\/div>\n<\/div>\n<\/li>\n
      7. \u4fdd\u5b58\u6587\u4ef6\u3002<\/span><\/li>\n<\/ol>\n
        \u5c06\u65b0\u7ec4\u4ef6\u6dfb\u52a0\u5230Event Comms App<\/span><\/h2>\n
          \n
        1. \u90e8\u7f72<\/span>lwc<\/span><\/strong>\u6587\u4ef6\u5939\uff0c\u7136\u540e\u5237\u65b0Event Comms\u5e94\u7528\u7a0b\u5e8f\u9875\u9762\u3002<\/span><\/li>\n
        2. \u6253\u5f00<\/span>\u4e8b\u4ef6\u901a\u8baf<\/span><\/strong>\u9875\u9762\u8fdb\u884c\u7f16\u8f91\u3002<\/span><\/li>\n
        3. \u5c06<\/span>remoteControl<\/span><\/strong>\u7ec4\u4ef6\u62d6\u5230<\/strong>\u9875\u9762\u7684\u53f3\u4fa7\u533a\u57df\u3002<\/span><\/li>\n
        4. \u5c06<\/span>counts<\/span><\/strong>\u7ec4\u4ef6\u62d6\u5230remoteControl\u7ec4\u4ef6\u4e0b\u65b9\u7684\u53f3\u4fa7\u533a\u57df\u3002<\/span><\/li>\n
        5. \u5355\u51fb\u201c<\/span>\u4fdd\u5b58\u201d<\/span><\/strong>\uff0c\u7136\u540e\u9000\u51faLightning App Builder\u3002<\/span><\/li>\n<\/ol>\n
          \u9a8c\u8bc1\u901a\u8baf<\/span><\/strong><\/p>\n
            \n
          1. \u5355\u51fb\u8fdc\u7a0b\u63a7\u5236\u4e2d\u7684\u6309\u94ae\u4ee5\u66f4\u6539\u8ba1\u6570\u7ec4\u4ef6\u4e2d\u7684\u8ba1\u6570\u3002<\/span><\/li>\n<\/ol>\n
            \u60a8\u4e5f\u53ef\u4ee5\u4f7f\u7528Lightning\u6d88\u606f\u670d\u52a1\u4e0eAura\u7ec4\u4ef6\u548cVisualforce\u9875\u9762\u8fdb\u884c\u901a\u4fe1\u3002\u8fd9\u662f\u4f7f\u4e0d\u540c\u7c7b\u578b\u7684\u7ec4\u4ef6\u4fdd\u6301\u540c\u6b65\u7684\u6700\u5e72\u51c0\u7684\u65b9\u6cd5\u3002\u00a0<\/span><\/p>\n
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