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! !<\/strong><\/p>\n\n\n\n \u5728\u5efa\u7acb\u8fde\u63a5\u7684\u65f6\u5019\u5c31\u628a will\uff08\u9057\u5631\uff09\u5199\u597d\u4fdd\u5b58\u5728\u670d\u52a1\u5668\uff0c\u4e00\u65e6\u5ba2\u6237\u7aef\u51fa\u73b0\u5f02\u5e38\u4e2d\u65ad\uff0c\u4fbf\u4f1a\u89e6\u53d1\u670d\u52a1\u5668\u53d1\u5e03Will Message\u6d88\u606f\u5230Will Topic\u4e3b\u9898\u4e0a\u53bb\uff0c\u901a\u77e5Will Topic\u8ba2\u9605\u8005\uff0c\u5bf9\u65b9\u56e0\u5f02\u5e38\u9000\u51fa\u3002<\/p>\n\n\n\n -END- \u524d\u8a00 \u63a5\u5230\u4efb\u52a1\u9879\u76ee\u9700\u8981\u7528MQTT\u6765\u5199\u6d88\u606f\u63a8\u9001\uff0c\u7ecf\u8fc7\u4e00\u6bb5\u65f6\u95f4\u5728\u7f51\u4e0a\u67e5\u770b\u8d44\u6599\u540e\u5199\u4e0b\u8fd9\u7bc7\u6587\u7ae0\uff0c\u6587\u7ae0\u5185\u5bb9\u5927\u90fd\u6765\u81ea\u4e92\u8054\u7f51\uff0c\u5728\u6587\u7ae0\u6700\u540e\u4e5f\u4f1a\u8d34\u51fa\u76f8\u5173\u7f51\u5740\u548c … \u7ee7\u7eed\u9605\u8bfb iOS MQTT\u534f\u8bae\u7b14\u8bb0\u4e4b\u6d88\u606f\u63a8\u9001<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[4,5],"_links":{"self":[{"href":"https:\/\/www.hlzhy.com\/index.php?rest_route=\/wp\/v2\/posts\/51"}],"collection":[{"href":"https:\/\/www.hlzhy.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.hlzhy.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.hlzhy.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hlzhy.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=51"}],"version-history":[{"count":2,"href":"https:\/\/www.hlzhy.com\/index.php?rest_route=\/wp\/v2\/posts\/51\/revisions"}],"predecessor-version":[{"id":141,"href":"https:\/\/www.hlzhy.com\/index.php?rest_route=\/wp\/v2\/posts\/51\/revisions\/141"}],"wp:attachment":[{"href":"https:\/\/www.hlzhy.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=51"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.hlzhy.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=51"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.hlzhy.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=51"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}source 'https:\/\/github.com\/CocoaPods\/Specs.git'\nplatform :ios, '8.4'\npod 'MQTTClient'\ntarget 'XXXXX' do\nend\n<\/code><\/pre>\n\n\n\n![\"\"](\"https:\/\/www.hlzhy.com\/wp-content\/uploads\/2019\/07\/MQTT-1024x896.png\")
<\/figure><\/div>\n\n\n\n\u5efa\u7acb\u8fde\u63a5<\/h3>\n\n\n\n
self.manager = [[MQTTSessionManager alloc] init];\n self.manager.delegate = self;\n self.manager.subscriptions = [NSDictionary dictionaryWithObject:[NSNumber numberWithInt:MQTTQosLevelExactlyOnce] forKey:[NSString stringWithFormat:@\"%@\/#\", self.base]];\n [sessionManager connectTo:@\u201c192.168.1.4\u201d \/\/\u670d\u52a1\u5668\u5730\u5740 \n port:1883 \/\/\u670d\u52a1\u7aef\u7aef\u53e3\u53f7 \n tls:false \/\/\u662f\u5426\u4f7f\u7528tls\u534f\u8bae\uff0cmosca\u662f\u652f\u6301tls\u7684\uff0c\u5982\u679c\u4f7f\u7528\u4e86\u8981\u8bbe\u7f6e\u6210true \n keepalive:60 \/\/\u5fc3\u8df3\u65f6\u95f4\uff0c\u5355\u4f4d\u79d2\uff0c\u6bcf\u9694\u56fa\u5b9a\u65f6\u95f4\u53d1\u9001\u5fc3\u8df3\u5305 \n clean:false \/\/session\u662f\u5426\u6e05\u9664\uff0c\u8fd9\u4e2a\u9700\u8981\u6ce8\u610f\uff0c\u5982\u679c\u662ffalse\uff0c\u4ee3\u8868\u4fdd\u6301\u767b\u5f55\uff0c\u5982\u679c\u5ba2\u6237\u7aef\u79bb\u7ebf\u4e86\u518d\u6b21\u767b\u5f55\u5c31\u53ef\u4ee5\u63a5\u6536\u5230\u79bb\u7ebf\u6d88\u606f\u3002\u6ce8\u610f\uff1aQoS\u4e3a1\u548cQoS\u4e3a2\uff0c\u5e76\u9700\u8ba2\u9605\u548c\u53d1\u9001\u4e00\u81f4 \n auth:true \/\/\u662f\u5426\u4f7f\u7528\u767b\u5f55\u9a8c\u8bc1\uff0c\u548c\u4e0b\u9762\u7684user\u548cpass\u53c2\u6570\u7ec4\u5408\u4f7f\u7528 \n user:_userName \/\/\u7528\u6237\u540d \n pass:_passwd \/\/\u5bc6\u7801 \n willTopic:@\"\" \/\/\u4e0b\u9762\u56db\u4e2a\u53c2\u6570\u7528\u6765\u8bbe\u7f6e\u5982\u679c\u5ba2\u6237\u7aef\u5f02\u5e38\u79bb\u7ebf\u53d1\u9001\u7684\u6d88\u606f\uff0c\u5f53\u524d\u53c2\u6570\u662f\u54ea\u4e2atopic\u7528\u6765\u4f20\u8f93\u5f02\u5e38\u79bb\u7ebf\u6d88\u606f\uff0c\u8fd9\u91cc\u7684\u5f02\u5e38\u79bb\u7ebf\u6d88\u606f\u90fd\u6307\u7684\u662f\u5ba2\u6237\u7aef\u6389\u7ebf\u540e\u53d1\u9001\u7684\u6389\u7ebf\u6d88\u606f \n will:@\"\" \/\/\u5f02\u5e38\u79bb\u7ebf\u6d88\u606f\u4f53\u3002\u81ea\u5b9a\u4e49\u7684\u5f02\u5e38\u79bb\u7ebf\u6d88\u606f\uff0c\u7ea6\u5b9a\u597d\u683c\u5f0f\u5c31\u53ef\u4ee5\u4e86 \n willQos:0 \/\/\u63a5\u6536\u79bb\u7ebf\u6d88\u606f\u7684\u7ea7\u522b 0\u30011\u30012\n willRetainFlag:false \/\/\u53ea\u6709\u5728\u4e3atrue\u65f6\uff0cWill Qos\u548cWill Retain\u624d\u4f1a\u88ab\u8bfb\u53d6\uff0c\u6b64\u65f6\u6d88\u606f\u4f53payload\u4e2d\u8981\u51fa\u73b0Will Topic\u548cWill Message\u5177\u4f53\u5185\u5bb9\uff0c\u5426\u5219\uff0cWill QoS\u548cWill Retain\u503c\u4f1a\u88ab\u5ffd\u7565\u6389\n withClientId:nil]; \/\/\u5ba2\u6237\u7aefid\uff0c\u9700\u8981\u7279\u522b\u6307\u51fa\u7684\u662f\u8fd9\u4e2aid\u9700\u8981\u5168\u5c40\u552f\u4e00\uff0c\u56e0\u4e3a\u670d\u52a1\u7aef\u662f\u6839\u636e\u8fd9\u4e2a\u6765\u533a\u5206\u4e0d\u540c\u7684\u5ba2\u6237\u7aef\u7684\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u4e00\u4e2aid\u767b\u5f55\u540e\uff0c\u5047\u5982\u6709\u53e6\u5916\u7684\u8fde\u63a5\u4ee5\u8fd9\u4e2aid\u767b\u5f55\uff0c\u4e0a\u4e00\u4e2a\u8fde\u63a5\u4f1a\u88ab\u8e22\u4e0b\u7ebf\n<\/code><\/pre>\n\n\n\n\u8ba2\u9605\u548c\u53d1\u9001\u6d88\u606f<\/h3>\n\n\n\n
\/\/\u8ba2\u9605\u4e3b\u9898\u3002NSDictionary\u7c7b\u578b\uff0cObject \u4e3a QoS\uff0ckey \u4e3a Topic\nself.manager.subscriptions = [NSDictionary dictionaryWithObject:[NSNumber numberWithInt:MQTTQosLevelExactlyOnce] forKey:_topic];\n\n\/\/\u53d1\u9001\u6d88\u606f,\u8fd4\u56de\u503cmsgid\u5927\u4e8e0\u4ee3\u8868\u53d1\u9001\u6210\u529f\u3002\uff08\u6ce8\u610f\uff1a\u8fd9\u91cc\u8bf4\u201c\u53d1\u9001\u6210\u529f\u201d\u5e76\u4e0d\u662f\u6307\u201c\u6210\u529f\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u201d\uff08\u65e0\u7f51\u7edc\u60c5\u51b5\u4e0b\u4e5f\u53ef\u80fd\u4f1a\u8fd4\u56de\u5927\u4e8e0\uff09\uff09\n\/\/msgid\uff1aPUBLISH\u6d88\u606f\u7684\u6d88\u606f\u6807\u8bc6\u7b26\u3002 \u5982\u679cqos\u4e3a0\uff0c\u5219\u4e3a\u96f6\u3002\u5982\u679cqos\u4e3a1\u62162\uff0c\u5219\u5728\u6d88\u606f\u4e22\u5f03\u65f6\u4e3a\u96f6\nUInt16 msgid = [sessionManager sendData:[msg dataUsingEncoding:NSUTF8StringEncoding] \/\/\u8981\u53d1\u9001\u7684\u6d88\u606f\u4f53 \n topic:_topic \/\/\u8981\u5f80\u54ea\u4e2atopic\u53d1\u9001\u6d88\u606f \n qos:MQTTQosLevelExactlyOnce \/\/\u6d88\u606f\u7ea7\u522b \n retain:false];\n<\/code><\/pre>\n\n\n\n\u4ec5\u5728\u4f7f\u7528qos 1\u62162\u65f6\u6709\u6548\u3002(\u8bb0\u5f97\u8bbe\u7f6edelegate)<\/code><\/p>\n\n\n\n\/\/MQTTSessionManagerDelegate\n\/ **\u5728\u5b9e\u9645\u5df2\u53d1\u9001\u6d88\u606f\u65f6\u88ab\u8c03\u7528\n @param msgID\u4f20\u9012\u7684\u6d88\u606f\u7684\u6d88\u606f\u6807\u8bc6\u7b26\n @note \u4ec5\u5728\u4f7f\u7528qos 1\u62162\u53d1\u5e03\u540e\u8c03\u7528\u6b64\u65b9\u6cd5\n *\/\n-(void)messageDelivered:(UInt16)msgID{\n \n}\n<\/code><\/pre>\n\n\n\n\/\/\u6ce8\u518c\u4e00\u4e2a\u89c2\u5bdf\u8005\uff0c\u76d1\u542ceffectiveSubscriptions\u7684\u6539\u53d8\n[self.manager addObserver:self\n forKeyPath:@\"effectiveSubscriptions\"\n options:NSKeyValueObservingOptionInitial | NSKeyValueObservingOptionNew\n context:nil];\n\n- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {\n if ([keyPath isEqualToString:@\"effectiveSubscriptions\"]) {\n MQTTSessionManager *manager = (MQTTSessionManager *)object;\n NSLog(@\"\u8ba2\u9605\u6210\u529f\u7684\u4e3b\u9898: %@\", manager.effectiveSubscriptions);\n return;\n }\n}\n<\/code><\/pre>\n\n\n\n\u63a5\u6536\u6d88\u606f<\/h3>\n\n\n\n
\/*\n * MQTTSessionManagerDelegate\n *\/\n- (void)handleMessage:(NSData *)data onTopic:(NSString *)topic retained:(BOOL)retained {\n \/*\n * MQTTClient: process received message\n *\/\n NSString *dataString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];\n}\n<\/code><\/pre>\n\n\n\n\u76d1\u63a7\u8fde\u63a5\u72b6\u6001<\/h3>\n\n\n\n
\/\/\u6ce8\u518c\u89c2\u5bdf\u8005\uff0c\u8bb0\u5f97\u5728\u79bb\u5f00\u9875\u9762\u65f6\u79fb\u9664\u89c2\u5bdf\u8005\n- (void)viewWillAppear:(BOOL)animated {\n [super viewWillAppear:animated];\n [sessionManager addObserver:self\n forKeyPath:@\"state\"\n options:NSKeyValueObservingOptionInitial | NSKeyValueObservingOptionNew\n context:nil];\n}\n\n- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {\n switch (sessionManager.state) {\n case MQTTSessionManagerStateClosed: \/\/\u8fde\u63a5\u5df2\u7ecf\u5173\u95ed\n break;\n case MQTTSessionManagerStateClosing: \/\/\u8fde\u63a5\u6b63\u5728\u5173\u95ed\n break;\n case MQTTSessionManagerStateConnected: \/\/\u5df2\u7ecf\u8fde\u63a5\n break;\n case MQTTSessionManagerStateConnecting: \/\/\u6b63\u5728\u8fde\u63a5\u4e2d\n break;\n case MQTTSessionManagerStateError: \/\/\u5f02\u5e38\n break;\n case MQTTSessionManagerStateStarting: \/\/\u5f00\u59cb\u8fde\u63a5\n default:\n break;\n }\n}\n<\/code><\/pre>\n\n\n\n\u4e00\u4e9b\u5c5e\u6027\u7684\u8bf4\u660e<\/h3>\n\n\n\n
\u5b58\u50a8\u8ba2\u9605\u7684\u6d88\u606fQoS1\u548cQoS2\u6d88\u606f
\u6b63\u5728\u53d1\u9001\u6d88\u606f\u671f\u95f4\u8fde\u63a5\u4e22\u5931\u5bfc\u81f4\u53d1\u9001\u5931\u8d25\u7684\u6d88\u606f
\u4ee5\u4fbf\u5f53\u5ba2\u6237\u7aef\u91cd\u65b0\u8fde\u63a5\u65f6\u4ee5\u4e0a\u6d88\u606f\u53ef\u4ee5\u88ab\u91cd\u65b0\u4f20\u9012\u3002
\u503c\u4e3atrue\uff0c\u670d\u52a1\u5668\u9700\u8981\u7acb\u523b\u6e05\u7406\u8fde\u63a5\u72b6\u6001\u6570\u636e\u3002<\/li>
0\u4ee3\u8868\u201c\u81f3\u591a\u4e00\u6b21\u201d\uff0c\u6d88\u606f\u53d1\u5e03\u5b8c\u5168\u4f9d\u8d56\u5e95\u5c42 TCP\/IP \u7f51\u7edc\u3002\u4f1a\u53d1\u751f\u6d88\u606f\u4e22\u5931\u6216\u91cd\u590d\u3002\u8fd9\u4e00\u7ea7\u522b\u53ef\u7528\u4e8e\u5982\u4e0b\u60c5\u51b5\uff0c\u73af\u5883\u4f20\u611f\u5668\u6570\u636e\uff0c\u4e22\u5931\u4e00\u6b21\u8bfb\u8bb0\u5f55\u65e0\u6240\u8c13\uff0c\u56e0\u4e3a\u4e0d\u4e45\u540e\u8fd8\u4f1a\u6709\u7b2c\u4e8c\u6b21\u53d1\u9001\u3002
1\u4ee3\u8868\u201c\u81f3\u5c11\u4e00\u6b21\u201d\uff0c\u786e\u4fdd\u6d88\u606f\u5230\u8fbe\uff0c\u4f46\u6d88\u606f\u91cd\u590d\u53ef\u80fd\u4f1a\u53d1\u751f\u3002
2\u4ee3\u8868\u201c\u53ea\u6709\u4e00\u6b21\u201d\uff0c\u786e\u4fdd\u6d88\u606f\u5230\u8fbe\u4e00\u6b21\u3002\u8fd9\u4e00\u7ea7\u522b\u53ef\u7528\u4e8e\u5982\u4e0b\u60c5\u51b5\uff0c\u5728\u8ba1\u8d39\u7cfb\u7edf\u4e2d\uff0c\u6d88\u606f\u91cd\u590d\u6216\u4e22\u5931\u4f1a\u5bfc\u81f4\u4e0d\u6b63\u786e\u7684\u7ed3\u679c\u3002 \u5907\u6ce8\uff1a\u7531\u4e8e\u670d\u52a1\u7aef\u91c7\u7528Mosca\u5b9e\u73b0\uff0cMosca\u76ee\u524d\u53ea\u652f\u6301\u5230QoS 1
\u5982\u679c\u53d1\u9001\u7684\u662f\u4e34\u65f6\u7684\u6d88\u606f\uff0c\u4f8b\u5982\u7ed9\u67d0topic\u6240\u6709\u5728\u7ebf\u7684\u8bbe\u5907\u53d1\u9001\u4e00\u6761\u6d88\u606f\uff0c\u4e22\u5931\u7684\u8bdd\u4e5f\u65e0\u6240\u8c13\uff0c0\u5c31\u53ef\u4ee5\u4e86\uff08\u5ba2\u6237\u7aef\u767b\u5f55\u7684\u65f6\u5019\u8981\u6307\u660e\u652f\u6301\u7684QoS\u7ea7\u522b\uff0c\u540c\u65f6\u53d1\u9001\u6d88\u606f\u7684\u65f6\u5019\u4e5f\u8981\u6307\u660e\u8fd9\u6761\u6d88\u606f\u652f\u6301\u7684QoS\u7ea7\u522b\uff09\uff0c\u5982\u679c\u9700\u8981\u5ba2\u6237\u7aef\u4fdd\u8bc1\u80fd\u63a5\u6536\u6d88\u606f\uff0c\u9700\u8981\u6307\u5b9aQoS\u4e3a1\uff0c\u5982\u679c\u540c\u65f6\u9700\u8981\u52a0\u5165\u5ba2\u6237\u7aef\u4e0d\u5728\u7ebf\u4e5f\u8981\u80fd\u63a5\u6536\u5230\u6d88\u606f\uff0c\u90a3\u4e48\u5ba2\u6237\u7aef\u767b\u5f55\u7684\u65f6\u5019\u8981\u6307\u5b9asession\u7684\u6709\u6548\u6027\uff0c\u63a5\u6536\u79bb\u7ebf\u6d88\u606f\u9700\u8981\u6307\u5b9a\u670d\u52a1\u7aef\u8981\u4fdd\u7559\u5ba2\u6237\u7aef\u7684session\u72b6\u6001\u3002<\/li>
\u5907\u6ce8\uff1a\u65b0\u6765\u4e4d\u5230\u7684\u8ba2\u9605\u8005\uff0c\u53ea\u4f1a\u53d6\u51fa\u6700\u65b0\u7684\u4e00\u4e2aRETAIN flag = 1\u7684\u6d88\u606f\u63a8\u9001\u3002
false\uff1a\u4ec5\u4ec5\u4e3a\u5f53\u524d\u8ba2\u9605\u8005\u63a8\u9001\u6b64\u6d88\u606f\u3002
\u5047\u5982\u670d\u52a1\u5668\u6536\u5230\u4e00\u4e2a\u7a7a\u6d88\u606f\u4f53(zero-length payload)\u3001RETAIN = 1\u3001\u5df2\u5b58\u5728Topic name\u7684PUBLISH\u6d88\u606f\uff0c\u670d\u52a1\u5668\u53ef\u4ee5\u5220\u9664\u6389\u5bf9\u5e94\u7684\u5df2\u88ab\u6301\u4e45\u5316\u7684PUBLISH\u6d88\u606f\u3002<\/li>\u7f51\u5740\u548cDemo<\/h3>\n\n\n\n
\u57fa\u4e8emqtt\u7684\u6d88\u606f\u63a8\u9001\uff08\u4e09\uff09\u5ba2\u6237\u7aef\u5b9e\u73b0<\/a>
MQTT\u534f\u8bae\u7b14\u8bb0\u4e4b\u8fde\u63a5\u548c\u5fc3\u8df3<\/a>
MQTT\u534f\u8bae\u7b14\u8bb0\u4e4b\u5934\u90e8\u4fe1\u606f<\/a><\/li>
MQTTChat<\/a> (MQTT-Client\u4f5c\u8005Christoph Krey\u5199\u7684MQTT-Client \u6f14\u793a Demo)
MQTTClient<\/a>\uff08\u867d\u7136\u540d\u53ebMQTTClient\uff0c\u4f46\u662f\u662f\u7528 MQTTKit \u5199\u7684\uff09
MQTTChat – 2<\/a>\uff08\u5bf9MQTTChat\u4fee\u6539\u4e86\u4e00\u70b9\u70b9\uff0c\u4fee\u6539\u4e86\u4e00\u4e9b\u6587\u5b57\u4e3a\u4e2d\u6587\uff0c\u65b9\u4fbf\u82f1\u6587\u4e0d\u597d\u7684\u540c\u5b66\u5feb\u901f\u7406\u89e3\u3002\u5e76\u6dfb\u52a0\u4e862\u4e2a\u4e22\u5931\u7684\u6587\u4ef6\uff09<\/li><\/ul>\n\n\n\n
\u4e00\u4e2a\u516c\u5f00\u7684mosquitto MQTT\u6d4b\u8bd5\u670d\u52a1\u5668 test.mosquitto.org<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"