MQTTKit is a modern event-driven Objective-C library for MQTT 3.1.
It uses Mosquitto 1.2.3 library.
An iOS application using MQTTKit is available at MQTTExample.
On your Podfile add this project:
...
pod 'MQTTKit', :git => 'https://github.com/mobile-web-messaging/MQTTKit.git'
...
For the first time, run pod install, if you are updating the project invoke pod update.
Import the MQTTKit.h header file
#import <MQTTKit.h>// create the client with a unique client ID
NSString *clientID = ...
MQTTClient *client = [[MQTTClient alloc] initWithClientId:clientID];
// connect to the MQTT server
[self.client connectToHost:@"iot.eclipse.org"
completionHandler:^(NSUInteger code) {
if (code == ConnectionAccepted) {
// when the client is connected, send a MQTT message
[self.client publishString:@"Hello, MQTT"
toTopic:@"/MQTTKit/example"
withQos:AtMostOnce
retain:NO
completionHandler:^(int mid) {
NSLog(@"message has been delivered");
}];
}
}];
// define the handler that will be called when MQTT messages are received by the client
[self.client setMessageHandler:^(MQTTMessage *message) {
NSString *text = [message.payloadString];
NSLog(@"received message %@", text);
}];
// connect the MQTT client
[self.client connectToHost:@"iot.eclipse.org"
completionHandler:^(MQTTConnectionReturnCode code) {
if (code == ConnectionAccepted) {
// when the client is connected, subscribe to the topic to receive message.
[self.client subscribe:@"/MQTTKit/example"
withCompletionHandler:nil];
}
}];[self.client disconnectWithCompletionHandler:^(NSUInteger code) {
// The client is disconnected when this completion handler is called
NSLog(@"MQTT client is disconnected");
}];