{"id":3943,"date":"2024-01-30T09:04:01","date_gmt":"2024-01-30T01:04:01","guid":{"rendered":"http:\/\/www.ponybai.com\/?p=3943"},"modified":"2023-12-03T09:30:27","modified_gmt":"2023-12-03T01:30:27","slug":"%e4%bd%bf%e7%94%a8-lightning-message-service-%e8%b7%a8-dom-%e8%bf%9b%e8%a1%8c%e9%80%9a%e4%bf%a1","status":"publish","type":"post","link":"http:\/\/www.ponybai.com\/?p=3943","title":{"rendered":"\u4f7f\u7528 Lightning Message Service \u8de8 DOM \u8fdb\u884c\u901a\u4fe1"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u4f7f\u7528 Lightning \u6d88\u606f\u670d\u52a1\u5728 Lightning \u9875\u9762\u5185\u7684 DOM \u4e4b\u95f4\u8fdb\u884c\u901a\u4fe1\u3002\u5728\u540c\u4e00 Lightning \u9875\u9762\u4e2d\u5d4c\u5165\u7684 Visualforce \u9875\u9762\u3001Aura \u7ec4\u4ef6\u548c Lightning Web \u7ec4\u4ef6\uff08\u5305\u62ec\u5b9e\u7528\u7a0b\u5e8f\u680f\u4e2d\u7684\u7ec4\u4ef6\u548c\u5f39\u51fa\u5f0f\u5b9e\u7528\u7a0b\u5e8f\uff09\u4e4b\u95f4\u8fdb\u884c\u901a\u4fe1\u3002\u9009\u62e9\u7ec4\u4ef6\u662f\u8ba2\u9605\u6765\u81ea\u6574\u4e2a\u5e94\u7528\u7a0b\u5e8f\u7684\u6d88\u606f\uff0c\u8fd8\u662f\u4ec5\u8ba2\u9605\u6765\u81ea\u6d3b\u52a8\u533a\u57df\u7684\u6d88\u606f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u60a8\u8981\u4ece Salesforce Classic \u5207\u6362\u5230 Lightning Experience\uff0c\u5219\u53ef\u4ee5\u6784\u5efa\u4e0e\u73b0\u6709 Visualforce \u9875\u9762\u6216 Aura \u7ec4\u4ef6\u8fdb\u884c\u901a\u4fe1\u7684 Lightning Web \u7ec4\u4ef6\u3002\u60a8\u8fd8\u53ef\u4ee5\u4f7f\u7528 Lightning \u6d88\u606f\u670d\u52a1\u901a\u8fc7 Open CTI \u4e0e\u8f6f\u4ef6\u7535\u8bdd\u8fdb\u884c\u901a\u4fe1\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u91cd\u8981<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Lightning \u6d88\u606f\u670d\u52a1\u5728 Lightning Experience \u548c Experience Builder \u7ad9\u70b9\u4e2d\u4f7f\u7528\u7684 Lightning \u7ec4\u4ef6\u4e2d\u53ef\u7528\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"create-a-message-channel\">\u521b\u5efa\u6d88\u606f\u901a\u9053<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u8981\u521b\u5efa Lightning \u6d88\u606f\u901a\u9053\uff0c\u8bf7\u4f7f\u7528 LightningMessageChannel \u5143\u6570\u636e\u7c7b\u578b\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5728\u7ec4\u7ec7\u4e2d\u5b9a\u4e49\u6d88\u606f\u901a\u9053\u5143\u6570\u636e<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u8981\u5c06 LightningMessageChannel \u90e8\u7f72\u5230\u60a8\u7684\u7ec4\u7ec7\u4e2d\uff0c\u8bf7\u521b\u5efa\u4e00\u4e2a SFDX \u9879\u76ee\u3002\u5728\u76ee\u5f55\u4e2d\u5305\u62ec XML \u5b9a\u4e49\u3002LightningMessageChannel \u6587\u4ef6\u540d\u9075\u5faa\u4ee5\u4e0b\u683c\u5f0f\u3002<code>force-app\/main\/default\/messageChannels\/<\/code><code>messageChannelName.messageChannel-meta.xml<\/code><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6709\u5173\u5143\u6570\u636e\u6587\u4ef6\u7684\u793a\u4f8b\uff0c\u8bf7\u53c2\u9605\u5143\u6570\u636e API \u5f00\u53d1\u4eba\u5458\u6307\u5357\uff1aLightningMessageChannel\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8981\u5c06\u5176\u6dfb\u52a0\u5230\u4e34\u65f6\u7ec4\u7ec7\uff0c\u8bf7\u8fd0\u884c \u3002<code>sf project deploy start<\/code><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8981\u5c06\u5176\u6dfb\u52a0\u5230\u5176\u4ed6\u7c7b\u578b\u7684\u7ec4\u7ec7\uff08\u5982\u6c99\u76d2\u6216 Developer Edition \u7ec4\u7ec7\uff09\uff0c\u8bf7\u8fd0\u884c \u3002<code>sf project deploy start<\/code><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5bfc\u5165\u6d88\u606f\u901a\u9053<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5\u4e0b\u662f\u5bfc\u5165 Lightning \u6d88\u606f\u901a\u9053\u7684\u65b9\u6cd5\uff0c\u7ec4\u4ef6\u53ef\u4ee5\u4f7f\u7528\u8be5\u901a\u9053\u901a\u8fc7 Lightning \u6d88\u606f\u670d\u52a1\u8fdb\u884c\u901a\u4fe1\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ Syntax\nimport channelName from \"@salesforce\/messageChannel\/channelReference\";<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ Syntax for resources in a managed package\nimport channelName from \"@salesforce\/messageChannel\/namespace__channelReference\";<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ Example\nimport recordSelected from \"@salesforce\/messageChannel\/Record_Selected__c\";<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>channelName<\/code>&#8211; \u7528\u4e8e\u6807\u8bc6\u6d88\u606f\u901a\u9053\u7684\u5bfc\u5165\u7b26\u53f7\u3002<\/li>\n\n\n\n<li><code>channelReference<\/code>&#8211; \u6d88\u606f\u901a\u9053\u7684 API \u540d\u79f0\u3002<\/li>\n\n\n\n<li><code>namespace<\/code>&#8211; \u5982\u679c\u6d88\u606f\u901a\u9053\u4f4d\u4e8e\u53d7\u7ba1\u8f6f\u4ef6\u5305\u4e2d\uff0c\u5219\u6b64\u503c\u4e3a\u53d7\u7ba1\u8f6f\u4ef6\u5305\u7684\u540d\u79f0\u7a7a\u95f4\u3002\u5982\u679c\u6d88\u606f\u901a\u9053\u4e0d\u5728\u6258\u7ba1\u5305\u4e2d\uff0c\u8bf7\u4e0d\u8981\u5305\u542b\u547d\u540d\u7a7a\u95f4\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u6ce8\u610f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><code>Record_Selected__c<\/code>\u6307 LightningMessageChannel \u5143\u6570\u636e\u7c7b\u578b\u7684\u81ea\u5b9a\u4e49\u5b9e\u4f8b\u3002\u5c3d\u7ba1\u5b83\u4f7f\u7528\u540e\u7f00\uff0c\u4f46\u5b83\u4e0d\u662f\u81ea\u5b9a\u4e49\u5bf9\u8c61\u3002<code>__c<\/code><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"define-the-scope-of-the-message-service\">\u5b9a\u4e49\u90ae\u4ef6\u670d\u52a1\u7684\u4f5c\u7528\u57df<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Lightning \u6d88\u606f\u670d\u52a1\u5141\u8bb8\u60a8\u5b9a\u4e49\u8ba2\u9605\u7ec4\u4ef6\u5728\u5e94\u7528\u7a0b\u5e8f\u4e2d\u63a5\u6536\u6d88\u606f\u7684\u8303\u56f4\u3002\u60a8\u53ef\u4ee5\u5c06\u8303\u56f4\u9650\u5236\u4e3a\u5e94\u7528\u7a0b\u5e8f\u7684\u6d3b\u52a8\u533a\u57df\uff0c\u4e5f\u53ef\u4ee5\u5c06\u8303\u56f4\u8bbe\u7f6e\u4e3a\u6574\u4e2a\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u91cd\u8981<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8e Lightning Web \u7ec4\u4ef6\uff0c\u8303\u56f4\u529f\u80fd\u4ec5\u5728\u4f7f\u7528 \u65f6\u53ef\u7528\u3002<code>@wire(MessageContext)<\/code><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5e94\u7528\u7a0b\u5e8f\u7684\u6d3b\u52a8\u533a\u57df\u5305\u62ec\u9009\u5b9a\u7684\u5bfc\u822a\u9009\u9879\u5361\u548c\u9879\u76ee\u3001\u5b9e\u7528\u7a0b\u5e8f\u9879\u76ee\u548c ES6 \u5e93\u3002\u5b9e\u7528\u7a0b\u5e8f\u9879\u76ee\u59cb\u7ec8\u5904\u4e8e\u6d3b\u52a8\u72b6\u6001\u3002\u5bfc\u822a\u9009\u9879\u5361\u548c\u9879\u76ee\u5305\u62ec\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6807\u51c6\u5bfc\u822a\u9009\u9879\u5361<\/li>\n\n\n\n<li>\u63a7\u5236\u53f0\u5bfc\u822a\u5de5\u4f5c\u533a\u9009\u9879\u5361<\/li>\n\n\n\n<li>\u63a7\u5236\u53f0\u5bfc\u822a\u5b50\u9009\u9879\u5361<\/li>\n\n\n\n<li>\u63a7\u5236\u53f0\u5bfc\u822a\u9879<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"412\" src=\"http:\/\/www.ponybai.com\/wp-content\/uploads\/2023\/12\/lms_scope.png\" alt=\"\" class=\"wp-image-3937\" srcset=\"http:\/\/www.ponybai.com\/wp-content\/uploads\/2023\/12\/lms_scope.png 800w, http:\/\/www.ponybai.com\/wp-content\/uploads\/2023\/12\/lms_scope-300x155.png 300w, http:\/\/www.ponybai.com\/wp-content\/uploads\/2023\/12\/lms_scope-768x396.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u8981\u4ece\u5e94\u7528\u7a0b\u5e8f\u4e2d\u7684\u4efb\u4f55\u4f4d\u7f6e\u63a5\u6536\u6d88\u606f\u901a\u9053\u4e0a\u7684\u6d88\u606f\uff0c\u8bf7\u4ece \u5bfc\u5165\u3002\u7136\u540e\uff0c\u8c03\u7528\u5e76\u4f20\u9012\u53ef\u9009\u7684\u7b2c\u56db\u4e2a\u53c2\u6570\u3002<code>APPLICATION_SCOPE<\/code><code>lightning\/messageService<\/code><code>subscribe()<\/code><code>{ scope: APPLICATION_SCOPE }<\/code><code>subscriberOptions<\/code><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ Import message service features.\nimport {\n    subscribe,\n    unsubscribe,\n    APPLICATION_SCOPE,\n    MessageContext\n} from 'lightning\/messageService';\n\n\/\/ To pass scope, you must get a message context.\n@wire(MessageContext)\n    messageContext;\n\n\/\/ Pass scope to the subscribe() method.\n    subscribeToMessageChannel() {\n        if (!this.subscription) {\n            this.subscription = subscribe(\n                this.messageContext,\n                recordSelected,\n                (message) =&gt; this.handleMessage(message),\n                { scope: APPLICATION_SCOPE }\n            );\n        }\n    }<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ece\u6d3b\u52a8\u533a\u57df\u63a5\u6536\u6d88\u606f\u662f\u9ed8\u8ba4\u884c\u4e3a\u3002\u65e0\u9700\u5305\u542b scope \u5c5e\u6027\u5373\u53ef\u5c06\u8303\u56f4\u9650\u5236\u4e3a\u6d3b\u52a8\u533a\u57df\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"publish-on-a-message-channel\">\u5728\u6d88\u606f\u901a\u9053\u4e0a\u53d1\u5e03<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u8981\u4ece Lightning Web \u7ec4\u4ef6\u5728\u6d88\u606f\u901a\u9053\u4e0a\u53d1\u5e03\u6d88\u606f\uff0c\u8bf7\u5728\u7ec4\u4ef6\u7684 JavaScript \u6587\u4ef6\u4e2d\u5305\u542b\u4f5c\u7528\u57df\u6a21\u5757\uff0c\u5e76\u8c03\u7528 Lightning \u6d88\u606f\u670d\u52a1\u7684\u51fd\u6570\u3002<code>@salesforce\/messageChannel<\/code><code>publish()<\/code><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Lightning \u6d88\u606f\u670d\u52a1\u5c06\u6d88\u606f\u53d1\u5e03\u5230\u4efb\u4f55\u8ba2\u9605\u7684\u7ec4\u4ef6\uff0c\u76f4\u5230\u7ec4\u4ef6\u751f\u547d\u5468\u671f\u7684\u9500\u6bc1\u9636\u6bb5\u3002\u6709\u65f6\uff0c\u5f53\u60a8\u79bb\u5f00 Lightning \u9875\u9762\u65f6\uff0c\u7ec4\u4ef6\u4f1a\u88ab\u7f13\u5b58\u800c\u4e0d\u662f\u9500\u6bc1\u3002\u5982\u679c Lightning \u6d88\u606f\u670d\u52a1\u7684\u8303\u56f4\u9650\u5b9a\u4e3a\u6574\u4e2a\u5e94\u7528\u7a0b\u5e8f\uff0c\u5219\u8fd9\u4e9b\u7ec4\u4ef6\u4ecd\u4f1a\u5411 Lightning \u6d88\u606f\u670d\u52a1\u53d1\u5e03\u6d88\u606f\u5e76\u4ece Lightning \u6d88\u606f\u670d\u52a1\u63a5\u6536\u6d88\u606f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u63d0\u793a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">lwc-recipes&nbsp;\u5b58\u50a8\u5e93\u6709\u4e00\u4e2a\u7ec4\u4ef6\uff0c\u7528\u4e8e\u5728 Lightning \u9875\u9762\u4e0a\u53d1\u5e03\u6d88\u606f\u4ee5\u901a\u77e5\u8ba2\u9605\u8005\u3002Lightning \u6d88\u606f\u670d\u52a1\u5728\u9875\u9762\u4e0a\u7684 Visualforce\u3001Aura \u548c Lightning Web \u7ec4\u4ef6\u4e4b\u95f4\u4f20\u8fbe\u8be5\u6d88\u606f\u3002<code>lmsPublisherWebComponent<\/code><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"879\" height=\"224\" src=\"http:\/\/www.ponybai.com\/wp-content\/uploads\/2023\/12\/lms-publish-components.png\" alt=\"\" class=\"wp-image-3938\" srcset=\"http:\/\/www.ponybai.com\/wp-content\/uploads\/2023\/12\/lms-publish-components.png 879w, http:\/\/www.ponybai.com\/wp-content\/uploads\/2023\/12\/lms-publish-components-300x76.png 300w, http:\/\/www.ponybai.com\/wp-content\/uploads\/2023\/12\/lms-publish-components-768x196.png 768w\" sizes=\"(max-width: 879px) 100vw, 879px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u8ba9\u6211\u4eec\u770b\u4e00\u4e0b&nbsp;<code>lmsPublisherWebComponent<\/code>&nbsp;\u7ec4\u4ef6\u3002\u7ec4\u4ef6\u7684 HTML \u6a21\u677f\u6587\u4ef6\u663e\u793a\u8054\u7cfb\u4eba\u5217\u8868\u3002\u9009\u62e9\u8054\u7cfb\u4eba\u540e\uff0c\u5c06\u8c03\u7528\u5904\u7406\u7a0b\u5e8f\uff0c\u8be5\u5904\u7406\u7a0b\u5e8f\u5c06\u6d88\u606f\u53d1\u5e03\u5230\u6d88\u606f\u901a\u9053\u3002<code>handleContactSelect<\/code><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;!-- lmsPublisherWebComponent.html --&gt;\n&lt;template&gt;\n  &lt;lightning-card title=\"LMSPublisherWebComponent\" icon-name=\"custom:custom30\"&gt;\n    &lt;div class=\"slds-m-around_medium\" oncontactselect={handleContactSelect}&gt;\n      &lt;template lwc:if={contacts.data}&gt;\n        &lt;template for:each={contacts.data} for:item=\"contact\"&gt;\n          &lt;c-contact-list-item-bubbling\n            key={contact.Id}\n            contact={contact}&gt;\n          &lt;\/c-contact-list-item-bubbling&gt;\n        &lt;\/template&gt;\n      &lt;\/template&gt;\n    &lt;\/div&gt;\n  &lt;\/lightning-card&gt;\n&lt;\/template&gt;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u7ec4\u4ef6\u7684 JavaScript \u6587\u4ef6\u4e2d\uff0c\u5bfc\u5165\u4f7f\u7528\u6d88\u606f\u901a\u9053\u6240\u9700\u7684\u6d88\u606f\u901a\u9053\u548c Lightning \u6d88\u606f\u670d\u52a1\u51fd\u6570\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ lmsPublisherWebComponent.js\nimport { LightningElement, wire } from \"lwc\";\nimport getContactList from \"@salesforce\/apex\/ContactController.getContactList\";\n\n\/\/ Import message service features required for publishing and the message channel\nimport { publish, MessageContext } from \"lightning\/messageService\";\nimport recordSelected from \"@salesforce\/messageChannel\/Record_Selected__c\";\n\nexport default class LmsPublisherWebComponent extends LightningElement {\n  @wire(getContactList)\n  contacts;\n\n  @wire(MessageContext)\n  messageContext;\n\n  \/\/ Respond to UI event by publishing message\n  handleContactSelect(event) {\n    const payload = { recordId: event.target.contact.Id };\n\n    publish(this.messageContext, recordSelected, payload);\n  }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u7528\u4e8e\u521b\u5efa\u4e00\u4e2a\u5bf9\u8c61\uff0c\u8be5\u5bf9\u8c61\u63d0\u4f9b\u6709\u5173\u4f7f\u7528 Lightning \u6d88\u606f\u670d\u52a1\u7684 Lightning Web \u7ec4\u4ef6\u7684\u4fe1\u606f\u3002\u4f7f\u7528\u9002\u914d\u5668\u65f6\uff0c\u60a8\u4e0d\u5fc5\u4e0e\u7ec4\u4ef6\u7684\u4efb\u4f55\u751f\u547d\u5468\u671f\u4e8b\u4ef6\u8fdb\u884c\u4ea4\u4e92\u3002\u5f53\u7ec4\u4ef6\u88ab\u9500\u6bc1\u65f6\uff0cLightning \u6d88\u606f\u670d\u52a1\u529f\u80fd\u4f1a\u81ea\u52a8\u6ce8\u9500\u3002<code>@wire(MessageContext)<\/code><code>MessageContext<\/code><code>@wire(MessageContext)<\/code><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8be5\u65b9\u6cd5\u521b\u5efa\u8981\u53d1\u5e03\u7684\u6d88\u606f\u5185\u5bb9\u3002\u95ea\u7535\u6d88\u606f\u670d\u52a1\u7684\u51fd\u6570\u91c7\u7528\u4e09\u4e2a\u53c2\u6570\uff1a\u6d88\u606f\u4e0a\u4e0b\u6587\u3001\u6d88\u606f\u901a\u9053\u540d\u79f0\u548c\u6d88\u606f\u6709\u6548\u8d1f\u8f7d\u3002\u5728\u8fd9\u91cc\uff0c\u6d88\u606f\u6709\u6548\u8d1f\u8f7d\u662f\u4e00\u4e2a JSON \u5bf9\u8c61\uff0c\u5176\u4e2d\u952e\u7684\u503c\u4e3a \u3002<code>handleContactSelect()<\/code><code>publish()<\/code><code>recordId<\/code><code>event.target.contact.Id<\/code><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6ce8\u610f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7ec4\u4ef6\u5fc5\u987b\u9644\u52a0\u5230 DOM\uff0c\u7136\u540e\u624d\u80fd\u4f7f\u7528\u7528 \u4fee\u9970\u7684\u5c5e\u6027\u3002\u4e0d\u80fd\u5728\u51fd\u6570\u4e2d\u4f7f\u7528\u3002<code>@wire(MessageContext)<\/code><code>@wire(MessageContext)<\/code><code>constructor()<\/code><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"subscribe-and-unsubscribe-from-a-message-channel\">\u8ba2\u9605\u548c\u53d6\u6d88\u8ba2\u9605\u6d88\u606f\u901a\u9053<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u8981\u8ba2\u9605\u548c\u53d6\u6d88\u8ba2\u9605\u6d88\u606f\u901a\u9053\u4e0a\u7684\u6d88\u606f\uff0c\u8bf7\u5c06\u6d88\u606f\u901a\u9053\u4ece\u4f5c\u7528\u57df\u6a21\u5757\u5bfc\u5165\u5230 Lightning Web \u7ec4\u4ef6\u4e2d\u3002\u8c03\u7528 Lightning \u6d88\u606f\u670d\u52a1\u548c\u51fd\u6570\u3002<code>@salesforce\/messageChannel<\/code><code>subscribe()<\/code><code>unsubscribe()<\/code><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u63d0\u793a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">lwc-recipes&nbsp;\u5b58\u50a8\u5e93\u6709\u4e00\u4e2a\u7ec4\u4ef6\uff0c\u7528\u4e8e\u663e\u793a\u5982\u4f55\u8ba2\u9605\u548c\u53d6\u6d88\u8ba2\u9605\u6d88\u606f\u901a\u9053\u3002\u6b64\u793a\u4f8b\u9002\u7528\u4e8e\u201c\u5728\u6d88\u606f\u901a\u9053\u4e0a\u53d1\u5e03\u201d\u4e2d\u7684\u53d1\u5e03\u8005\u7ec4\u4ef6\u3002<code>lmsSubscriberWebComponent<\/code><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8ba9\u6211\u4eec\u770b\u4e00\u4e0b&nbsp;lmsSubscriberWebComponent&nbsp;\u7ec4\u4ef6\u3002\u4ece\u53d1\u5e03\u8005\u7ec4\u4ef6\u4e2d\u9009\u62e9\u8054\u7cfb\u4eba\u4f1a\u5c06\u6240\u9009\u8bb0\u5f55 ID \u53d1\u5e03\u5230\u6d88\u606f\u901a\u9053\u3002<code>Record_Selected__c<\/code><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8ba2\u9605\u8005\u7ec4\u4ef6\u7684 HTML \u5bf9\u5df2\u53d1\u5e03\u7684\u6d88\u606f\u505a\u51fa\u53cd\u5e94\uff0c\u5e76\u663e\u793a\u5176\u8bb0\u5f55 ID \u901a\u8fc7\u6d88\u606f\u8d1f\u8f7d\u63d0\u4f9b\u7684\u8054\u7cfb\u4eba\u7684\u6570\u636e\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;!-- lmsSubscriberWebComponent.html --&gt;\n&lt;template&gt;\n  &lt;lightning-card title=\"LMSSubscriberWebComponent\" icon-name=\"custom:custom30\"&gt;\n    &lt;div class=\"slds-m-around_medium\"&gt;\n      &lt;template lwc:if={Picture__c}&gt;\n        &lt;img src={Picture__c} alt=\"Profile photo\" \/&gt;\n      &lt;\/template&gt;\n      &lt;p&gt;{Name}&lt;\/p&gt;\n      &lt;p&gt;{Title}&lt;\/p&gt;\n      &lt;p&gt;\n        &lt;lightning-formatted-phone value={Phone}&gt;&lt;\/lightning-formatted-phone&gt;\n      &lt;\/p&gt;\n      &lt;p&gt;\n        &lt;lightning-formatted-email value={Email}&gt;&lt;\/lightning-formatted-email&gt;\n      &lt;\/p&gt;\n    &lt;\/div&gt;\n  &lt;\/lightning-card&gt;\n&lt;\/template&gt;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u7ec4\u4ef6\u7684 JavaScript \u4e2d\uff0c\u5bfc\u5165\u4ece \u8ba2\u9605\u6240\u9700\u7684\u6d88\u606f\u670d\u52a1\u529f\u80fd\u3002\u4ece \u5bfc\u5165\u6d88\u606f\u901a\u9053\u3002<code>lightning\/messageService<\/code><code>Record_Selected__c<\/code><code>@salesforce\/messageChannel<\/code><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7528\u4e8e\u521b\u5efa Context \u5bf9\u8c61\uff0c\u8be5\u5bf9\u8c61\u63d0\u4f9b\u6709\u5173\u4f7f\u7528 Lightning \u6d88\u606f\u670d\u52a1\u7684 Lightning Web \u7ec4\u4ef6\u7684\u4fe1\u606f\u3002\u7ec4\u4ef6\u5fc5\u987b\u9644\u52a0\u5230 DOM\uff0c\u7136\u540e\u624d\u80fd\u4f7f\u7528\u7528 \u4fee\u9970\u7684\u5c5e\u6027\u3002<code>@wire(MessageContext)<\/code><code>@wire(MessageContext)<\/code><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8be5\u51fd\u6570\u68c0\u67e5\u662f\u5426\u4e3a null\u3002\u5982\u679c\u8ba2\u9605\u4e3a null\uff0c\u5219\u8c03\u7528 Lightning \u6d88\u606f\u670d\u52a1\u7684\u65b9\u6cd5\u5e76\u5c06\u5176\u5206\u914d\u7ed9 \u3002\u8be5\u65b9\u6cd5\u91c7\u7528\u4e09\u4e2a\u5fc5\u9700\u7684\u53c2\u6570\uff1a\u6d88\u606f\u4e0a\u4e0b\u6587\u3001\u6d88\u606f\u901a\u9053\u7684\u540d\u79f0\u4ee5\u53ca\u5904\u7406\u5df2\u53d1\u5e03\u6d88\u606f\u7684\u4fa6\u542c\u5668\u65b9\u6cd5\u3002\u8c03\u7528\u4fa6\u542c\u5668\u65b9\u6cd5\u65f6\uff0c\u5b83\u4f1a\u5c06\u6d88\u606f\u4f20\u9012\u7ed9 \u3002 \u4ece\u5b83\u6536\u5230\u7684 JSON \u6d88\u606f\u6709\u6548\u8d1f\u8f7d\u4e2d\u63d0\u53d6\u5c5e\u6027\u3002\u7136\u540e\uff0c\u4f7f\u7528\u4e0e\u8bb0\u5f55 ID \u5339\u914d\u7684\u8054\u7cfb\u4eba\u76f8\u5173\u7684\u4fe1\u606f\u66f4\u65b0 HTML \u6a21\u677f\u3002<code>subscribeToMessageChannel()<\/code><code>subscription<\/code><code>subscribe()<\/code><code>subscription<\/code><code>subscribe()<\/code><code>handleMessage()<\/code><code>handleMessage()<\/code><code>recordId<\/code><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u82e5\u8981\u4ece\u5e94\u7528\u7a0b\u5e8f\u4e2d\u7684\u4efb\u4f55\u4f4d\u7f6e\u63a5\u6536\u6d88\u606f\u901a\u9053\u4e0a\u7684\u6d88\u606f\uff0c\u8bf7\u5c06\u8be5\u65b9\u6cd5\u7684\u7b2c\u56db\u4e2a\u53c2\u6570\u4f5c\u4e3a\u53ef\u9009\u53c2\u6570\u4f20\u9012\u3002\u8bf7\u53c2\u9605\u5b9a\u4e49\u90ae\u4ef6\u670d\u52a1\u7684\u4f5c\u7528\u57df\u3002<code>{ scope: APPLICATION_SCOPE }subscribe()<\/code><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8981\u505c\u6b62\u63a5\u6536\u6765\u81ea Lightning \u6d88\u606f\u670d\u52a1\u7684\u6d88\u606f\uff0c\u8bf7\u8c03\u7528 \uff0c\u4f20\u5165\u8ba2\u9605\u5f15\u7528\u3002\u8be5\u5bf9\u8c61\u5305\u542b\u5bf9\u8981\u53d6\u6d88\u8ba2\u9605\u7684\u8ba2\u9605\u7684\u5f15\u7528\u3002\u6b64\u793a\u4f8b\u8c03\u7528 \uff0c\u540e\u8005\u8c03\u7528 \uff0c\u7136\u540e\u8bbe\u7f6e\u4e3a null\u3002<code>unsubscribe()<\/code><code>subscription<\/code><code>unsubscribeToMessageChannel()<\/code><code>unsubscribe()<\/code><code>subscription<\/code><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ lmsSubscriberWebComponent.js\nimport { LightningElement, wire } from \"lwc\";\nimport { getRecord, getFieldValue } from \"lightning\/uiRecordApi\";\nimport { ShowToastEvent } from \"lightning\/platformShowToastEvent\";\nimport { reduceErrors } from \"c\/ldsUtils\";\n\n\/\/ Import message service features required for subscribing and the message channel\nimport {\n  subscribe,\n  unsubscribe,\n  APPLICATION_SCOPE,\n  MessageContext,\n} from \"lightning\/messageService\";\nimport recordSelected from \"@salesforce\/messageChannel\/Record_Selected__c\";\n\nimport NAME_FIELD from \"@salesforce\/schema\/Contact.Name\";\nimport TITLE_FIELD from \"@salesforce\/schema\/Contact.Title\";\nimport PHONE_FIELD from \"@salesforce\/schema\/Contact.Phone\";\nimport EMAIL_FIELD from \"@salesforce\/schema\/Contact.Email\";\nimport PICTURE_FIELD from \"@salesforce\/schema\/Contact.Picture__c\";\n\nconst fields = &#91;NAME_FIELD, TITLE_FIELD, PHONE_FIELD, EMAIL_FIELD, PICTURE_FIELD];\n\nexport default class LmsSubscriberWebComponent extends LightningElement {\n  subscription = null;\n  recordId;\n\n  Name;\n  Title;\n  Phone;\n  Email;\n  Picture__c;\n\n  @wire(getRecord, { recordId: \"$recordId\", fields })\n  wiredRecord({ error, data }) {\n    if (error) {\n      this.dispatchToast(error);\n    } else if (data) {\n      fields.forEach((item) =&gt; (this&#91;item.fieldApiName] = getFieldValue(data, item)));\n    }\n  }\n\n  @wire(MessageContext)\n  messageContext;\n\n  \/\/ Encapsulate logic for Lightning message service subscribe and unsubsubscribe\n  subscribeToMessageChannel() {\n    if (!this.subscription) {\n      this.subscription = subscribe(\n        this.messageContext,\n        recordSelected,\n        (message) =&gt; this.handleMessage(message),\n        { scope: APPLICATION_SCOPE },\n      );\n    }\n  }\n\n  unsubscribeToMessageChannel() {\n    unsubscribe(this.subscription);\n    this.subscription = null;\n  }\n\n  \/\/ Handler for message received by component\n  handleMessage(message) {\n    this.recordId = message.recordId;\n  }\n\n  \/\/ Standard lifecycle hooks used to subscribe and unsubsubscribe to the message channel\n  connectedCallback() {\n    this.subscribeToMessageChannel();\n  }\n\n  disconnectedCallback() {\n    this.unsubscribeToMessageChannel();\n  }\n\n  \/\/ Helper\n  dispatchToast(error) {\n    this.dispatchEvent(\n      new ShowToastEvent({\n        title: \"Error loading contact\",\n        message: reduceErrors(error).join(\", \"),\n        variant: \"error\",\n      }),\n    );\n  }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6ce8\u610f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u521b\u5efa\u7684\u670d\u52a1\u7ec4\u4ef6\u4e0d\u662f \uff0c\u5219\u4e0d\u80fd\u7528\u4e8e\u521b\u5efa\u5bf9\u8c61\u3002\u800c\u662f\u4ece import \u548c methods\u3002\u7528\u4e8e\u521b\u5efa Context \u5bf9\u8c61\u5e76\u5c06\u5176\u5206\u914d\u7ed9\u5b57\u6bb5\uff0c\u5982 .\u7136\u540e\uff0c\u4f20\u5165\u65b9\u6cd5\u3002\u4e0d\u4f1a\u81ea\u52a8\u4e3a\u670d\u52a1\u7ec4\u4ef6\u53d1\u5e03\u4e0a\u4e0b\u6587\u3002\u8c03\u7528\u4ee5\u5220\u9664\u4e0e\u7ec4\u4ef6\u7684\u6d88\u606f\u4e0a\u4e0b\u6587\u5173\u8054\u7684\u4efb\u4f55\u8ba2\u9605\u3002<code>LightningElement<\/code><code>@wire(MessageContext)<\/code><code>MessageContext<\/code><code>createMessageContext()<\/code><code>releaseMessageContext()<\/code><code>lightning\/messageService<\/code><code>createMessageContext()<\/code><code>messageContext<\/code><code>messageContext<\/code><code>subscribe()<\/code><code>releaseMessageContext(messageContext)<\/code><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"lightning-message-service-limitations\">Lightning \u6d88\u606f\u670d\u52a1\u9650\u5236<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f7f\u7528 Lightning \u6d88\u606f\u670d\u52a1\u65f6\uff0c\u8bf7\u8bb0\u4f4f\u4ee5\u4e0b\u51e0\u70b9\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Lightning \u6d88\u606f\u670d\u52a1\u4ec5\u652f\u6301\u4ee5\u4e0b\u4f53\u9a8c\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Lightning Experience \u6807\u51c6\u5bfc\u822a<\/li>\n\n\n\n<li>Lightning Experience \u63a7\u5236\u53f0\u5bfc\u822a<\/li>\n\n\n\n<li>\u9002\u7528\u4e8e Aura \u548c Lightning Web \u7ec4\u4ef6\u7684 Salesforce \u79fb\u52a8\u5e94\u7528\u7a0b\u5e8f\uff0c\u4f46\u4e0d\u9002\u7528\u4e8e Visualforce \u9875\u9762<\/li>\n\n\n\n<li>Aura \u548c\u57fa\u4e8e LWR \u7684 Experience Builder \u7ad9\u70b9\u4e2d\u4f7f\u7528\u7684 Lightning \u7ec4\u4ef6\u3002\u6ce8\u610fLightning \u6d88\u606f\u670d\u52a1\u4e0d\u9002\u7528\u4e8e Salesforce \u9009\u9879\u5361 + Visualforce \u7ad9\u70b9\u6216 Experience Builder \u7ad9\u70b9\u4e2d\u7684 Visualforce \u9875\u9762\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u4e0d\u652f\u6301 Lightning \u6d88\u606f\u4f20\u9012\u670d\u52a1\u7684\u5bb9\u5668\u4e2d\uff0c\u4f7f\u7528\u8be5\u6a21\u5757\u3002\u4ece&nbsp;github.com\/developerforce\/pubsub&nbsp;\u4e0b\u8f7d\u6a21\u5757\u3002<code>pubsub<\/code><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728 AppExchange \u4e0a\u53d1\u5e03\u7684\u5305\u4e2d\u5305\u542b\u6d88\u606f\u901a\u9053\u65f6\uff0c\u652f\u6301 1GP \u548c 2GP \u5305\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8e Lightning Web \u7ec4\u4ef6\uff0c\u60a8\u53ef\u4ee5\u5b9a\u4e49\u8ba2\u9605\u7ec4\u4ef6\u4ec5\u5728\u4f7f\u7528 \u65f6\u5728\u5e94\u7528\u7a0b\u5e8f\u4e2d\u63a5\u6536\u6d88\u606f\u7684\u8303\u56f4\u3002<code>@wire(MessageContext)<\/code><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"use-mobile-device-features\">\u4f7f\u7528\u79fb\u52a8\u8bbe\u5907\u529f\u80fd<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u79fb\u52a8\u529f\u80fd\u5141\u8bb8\u60a8\u5728 Lightning Web \u7ec4\u4ef6\u4e2d\u4f7f\u7528\u79fb\u52a8\u8bbe\u5907\u529f\u80fd\u3002\u76f4\u63a5\u4ece\u60a8\u7684\u7ec4\u4ef6\u4ee3\u7801\u8bbf\u95ee\u6444\u50cf\u5934\u548c\u4f4d\u7f6e\u68c0\u6d4b\u786c\u4ef6\uff0c\u4ee5\u53ca\u8054\u7cfb\u4eba\u548c\u65e5\u5386\u6570\u636e\u7b49\u5e73\u53f0\u529f\u80fd\u3002\u4f7f\u7528\u8fd9\u4e9b\u7279\u5b9a\u4e8e\u79fb\u52a8\u8bbe\u5907\u7684\u529f\u80fd\u6784\u5efa\u611f\u89c9\u50cf\u672c\u673a\u79fb\u52a8\u5e94\u7528\u7a0b\u5e8f\u7684 Lightning \u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u300a\u79fb\u52a8\u548c\u79bb\u7ebf\u5f00\u53d1\u4eba\u5458\u6307\u5357\u300b\u4e2d\u63d0\u4f9b\u4e86\u5b8c\u6574\u7684\u8be6\u7ec6\u4fe1\u606f\uff0c\u8be5\u6307\u5357\u662f\u6267\u884c\u79fb\u52a8\u5f00\u53d1\u65f6\u672c\u6307\u5357\u7684\u91cd\u8981\u914d\u5957\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4f7f\u7528 Lightning Message 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