CocoaMQTT使用完整示例代码
时间: 2024-09-23 18:05:16 浏览: 15
CocoaMQTT是一款针对iOS、macOS等Apple平台的MQTT(Message Queuing Telemetry Transport)客户端库,它允许应用程序轻松地与MQTT服务器进行通信。以下是一个简单的CocoaMQTT连接、订阅主题并接收消息的完整示例代码:
首先,确保已经安装了CocoaMQTT库。你可以通过CocoaPods添加依赖:
```swift
pod 'CocoaAsyncSocket', '~> 7.6'
pod 'CocoaMQTT', '~> 4.0'
```
然后,导入必要的头文件并在初始化时设置证书(如果需要):
```swift
import CocoaMQTT
class ViewController: UIViewController {
private let mqttClient = CocoaMQTTClient(name: "YourAppClientId")
override func viewDidLoad() {
super.viewDidLoad()
mqttClient.onConnect = { _, _ in
print("Connected to MQTT broker")
}
mqttClient.onConnectionLost = { error in
print("Connection lost: \(error)")
}
// Set your MQTT server details and credentials here
mqttClient.hostname = "your_mqtt_server_url"
mqttClient.username = "your_username"
mqttClient.password = "your_password"
// If using SSL/TLS
mqttClient.useSSL = true
mqttClient.tlsOptions = [.validateTLSCertificate: false] // Disable certificate validation for demo purposes
// Connect to the broker
mqttClient.connect()
}
// Example subscription to a topic
func subscribeToTopic(topic: String) {
mqttClient.subscribe(to: topic, qos: .atLeastOnce, completion: { (subscriptionToken: String?, granted_qos: QoSLevel?) in
if subscriptionToken != nil {
print("Subscribed to \(topic) with token: \(subscriptionToken!)")
} else {
print("Error subscribing to \(topic): \(granted_qos)")
}
})
}
// Handle incoming messages
func processIncomingMessage(_ message: CocoaMQTTMessage) {
print("Received message on topic '\(message.topic)': \(message.payload.utf8)")
}
}
```
在这个示例中,你需要替换`hostname`, `username`, 和 `password`为实际的MQTT服务器地址和认证信息。连接成功后,可以订阅主题,并使用`processIncomingMessage(_:)`处理接收到的消息。