MQTTClient.h
#import <Foundation/Foundation.h>
@protocol MQTTDelegate <NSObject>
/**
* @brief 连接服务器
*
* @param [in] N/A
* @param [out] N/A
* @return void
* @note
*/
- (void) didConnect: (NSUInteger)code;
/**
* @brief 与服务器断开连接
*
* @param [in] N/A
* @param [out] N/A
* @return void
* @note
*/
- (void) didDisconnect;
/**
* @brief
*
* @param [in] N/A
* @param [out] N/A
* @return void
* @note
*/
- (void) didPublish: (NSUInteger)messageId;
// FIXME: create MosquittoMessage class
/**
* @brief 接收消息
*
* @param [in] N/A
* @param [out] N/A
* @return void
* @note
*/
- (void) didReceiveMessage: (NSString*)message topic:(NSString*)topic;
/**
* @brief
*
* @param [in] N/A
* @param [out] N/A
* @return void
* @note
*/
- (void) didSubscribe: (NSUInteger)messageId grantedQos:(NSArray*)qos;
/**
* @brief
*
* @param [in] N/A
* @param [out] N/A
* @return void
* @note
*/
- (void) didUnsubscribe: (NSUInteger)messageId;
@end
@interface MQTTClient : NSObject
{
struct mosquitto *mosq;
NSString *host;
unsigned short port;
NSString *username;
NSString *password;
unsigned short keepAlive;
BOOL cleanSession;
id<MQTTDelegate> delegate;
NSTimer *timer;
}
@property (readwrite,retain) NSString *host;
@property (readwrite,assign) unsigned short port;
@property (readwrite,retain) NSString *username;
@property (readwrite,retain) NSString *password;
@property (readwrite,assign) unsigned short keepAlive;
@property (readwrite,assign) BOOL cleanSession;
@property (readwrite,assign) id<MQTTDelegate> delegate;
/**
* @brief 单例模式的设置
*
* @param [in] N/A
* @param [out] N/A
* @return void
* @note
*/
+(MQTTClient *)getMQTTInstance;
/**
* @brief
*
* @param [in] N/A
* @param [out] N/A
* @return void
* @note
*/
+ (void) initialize;
/**
* @brief
*
* @param [in] N/A
* @param [out] N/A
* @return void
* @note
*/
+ (NSString*) version;
/**
* @brief
*
* @param [in] N/A
* @param [out] N/A
* @return void
* @note
*/
- (MQTTClient *) initWithClientId: (NSString*) clientId;
/**
* @brief
*
* @param [in] N/A
* @param [out] N/A
* @return void
* @note
*/
- (void) setMessageRetry: (NSUInteger)seconds;
/**
* @brief 连接服务器
*
* @param [in] N/A
* @param [out] N/A
* @return void
* @note
*/
- (void) connect;
/**
* @brief 连接到主机
*
* @param [in] N/A
* @param [out] N/A
* @return void
* @note
*/
- (void) connectToHost: (NSString*)host;
/**
* @brief
*
* @param [in] N/A
* @param [out] N/A
* @return void
* @note
*/
- (void) reconnect;
/**
* @brief
*
* @param [in] N/A
* @param [out] N/A
* @return void
* @note
*/
- (void) disconnect;
/**
* @brief
*
* @param [in] N/A
* @param [out] N/A
* @return void
* @note
*/
- (void)publishString: (NSString *)payload toTopic:(NSString *)topic retain:(BOOL)retain;
//- (void)publishMessage
/**
* @brief
*
* @param [in] N/A
* @param [out] N/A
* @return void
* @note
*/
- (void)subscribe: (NSString *)topic;
/**
* @brief
*
* @param [in] N/A
* @param [out] N/A
* @return void
* @note
*/
- (void)subscribe: (NSString *)topic withQos:(NSUInteger)qos;
/**
* @brief
*
* @param [in] N/A
* @param [out] N/A
* @return void
* @note
*/
- (void)unsubscribe: (NSString *)topic;
// This is called automatically when connected
- (void) loop: (NSTimer *)timer;
@end
MQTTClient.m
#import "MQTTClient.h"
#import "mosquitto.h"
@implementation MQTTClient
@synthesize host;
@synthesize port;
@synthesize username;
@synthesize password;
@synthesize keepAlive;
@synthesize cleanSession;
@synthesize delegate;
/**
* @brief 单例模式的设置
*
* @param [in] N/A
* @param [out] N/A
* @return void
* @note
*/
static MQTTClient *qttInstance = nil;
+(MQTTClient *)getMQTTInstance
{
@synchronized(self)
{
if(qttInstance==nil)
{
qttInstance=[[self alloc]init];
}
}
return qttInstance;
}
/**
* @brief 连接mqtt
*
* @param [in] N/A
* @param [out] N/A
* @return void
* @note
*/
static void on_connect(struct mosquitto *mosq, void *obj, int rc)
{
MQTTClient* client = (MQTTClient *)obj;
[[client delegate] didConnect:(NSUInteger)rc];
}
/**
* @brief 断开与mqtt的连接
*
* @param [in] N/A
* @param [out] N/A
* @return void
* @note
*/
static void on_disconnect(struct mosquitto *mosq, void *obj, int rc)
{
MQTTClient* client = (MQTTClient *)obj;
[[client delegate] didDisconnect];
}
/**
* @brief publish message
*
* @param [in] N/A
* @param [out] N/A
* @return void
* @note
*/
static void on_publish(struct mosquitto *mosq, void *obj, int message_id)
{
MQTTClient* client = (MQTTClient *)obj;
[[client delegate] didPublish:(NSUInteger)message_id];
}
/**
* @brief receive message
*
* @param [in] N/A
* @param [out] N/A
* @return void
* @note
*/
static void on_message(struct mosquitto *mosq, void *obj, const struct mosquitto_message *message)
{
MQTTClient * client = (MQTTClient *)obj;
NSString *topic = [NSString stringWithUTF8String: message->topic];
NSString *payload = [[[NSString alloc] initWithBytes:message->payload
length:message->payloadlen
encoding:NSUTF8StringEncoding] autorelease];
// FIXME: create MosquittoMessage class instead
[[client delegate] didReceiveMessage:payload topic:topic];
}
/**
* @brief didSubscribe
*
* @param [in] N/A
* @param [out] N/A
* @return void
* @note
*/
static void on_subscribe(struct mosquitto *mosq, void *obj, int message_id, int qos_count, const int *granted_qos)
{
MQTTClient * client = (MQTTClient *)obj;
// FIXME: implement this
[[client delegate] didSubscribe:message_id grantedQos:nil];
}
/**
* @brief
*
* @param [in] N/A
* @param [out] N/A
* @return void
* @note
*/
static void on_unsubscribe(struct mosquitto *mosq, void *obj, int message_id)
{
MQTTClient * client = (MQTTClient *)obj;
[[client delegate] didUnsubscribe:message_id];
}
/**
* @brief Initialize is called just before the first object is allocated
*
* @param [in] N/A
* @param [out] N/A
* @return void
* @note
*/
+ (void)initialize
{
mosquitto_lib_init();
}
/**
* @brief 版本信息
*
* @param [in] N/A
* @param [out] N/A
* @return void
* @note
*/
+ (NSString*)version
{
int major, minor, revision;
mosquitto_lib_version(&major, &minor, &revision);
return [NSString stringWithFormat:@"%d.%d.%d", major, minor, revision];
}
/**
* @brief 设置些参数状态配置
*
* @param [in] N/A
* @param [out] N/A
* @return void
* @note
*/
- (MQTTClient *) initWithClientId: (NSString*) clientId
{
if ((self = [super init]))
{
const char* cstrClientId = [clientId cStringUsingEncoding:NSUTF8StringEncoding];
[self setHost: nil];
[self setPort: 1883];
[self setKeepAlive: 60];
[self setCleanSession: YES];
mosq = mosquitto_new(cstrClientId, cleanSession, self);
mosquitto_connect_callback_set(mosq, on_connect);
mosquitto_disconnect_callback_set(mosq, on_disconnect);
mosquitto_publish_callback_set(mosq, on_publish);
mosquitto_message_callback_set(mosq, on_message);
mosquitto_subscribe_callback_set(mosq, on_subscribe);
mosquitto_unsubscribe_callback_set(mosq, on_unsubscribe);
timer = nil;
}
return self;
}
- (void) connect
{
const char *cstrHost = [host cStringUsingEncoding:NSASCIIStringEncoding];
const char *cstrUsername = NULL, *cstrPassword = NULL;
if (username)
cstrUsername = [username cStringUsingEncoding:NSUTF8StringEncoding];
if (password)
cstrPassword = [password cStringUsingEncoding:NSUTF8StringEncoding];
// FIXME: check for errors
mosquitto_username_pw_set(mosq, cstrUsername, cstrPassword);
int ret = mosquitto_connect(mosq, cstrHost, port, keepAlive);
NSLog(@"mqtt-ret-code = %d",ret);
if (ret == 0)
{
NSLog(@"//连接成功 设置ud");
}
else
{
NSLog(@"//连接失败");
}
// Setup timer to handle network events
// FIXME: better way to do this - hook into iOS Run Loop select() ?
// or run in seperate thread?
timer = [NSTimer scheduledTimerWithTimeInterval:0.01 // 10ms
target:self
selector:@selector(loop:)
userInfo:nil
repeats:YES];
}
- (void) connectToHost: (NSString*)aHost
{
[self setHost:aHost];
[self connect];
}
- (void) reconnect
{
mosquitto_reconnect(mosq);
}
- (void) disconnect
{
mosquitto_disconnect(mosq);
}
- (void) loop: (NSTimer *)timer
{
mosquitto_loop(mosq, 1, 1);
}
// FIXME: add QoS parameter?
- (void)publishString: (NSString *)payload toTopic:(NSString *)topic retain:(BOOL)retain
{
const char* cstrTopic = [topic cStringUsingEncoding:NSUTF8StringEncoding];
const uint8_t* cstrPayload = (const uint8_t*)[payload cStringUsingEncoding:NSUTF8StringEncoding];
mosquitto_publish(mosq, NULL, cstrTopic, [payload length], cstrPayload, 0, retain);
}
- (void)subscribe: (NSString *)topic
{
[self subscribe:topic withQos:0];
}
- (void)subscribe: (NSString *)topic withQos:(NSUInteger)qos
{
const char* cstrTopic = [topic cStringUsingEncoding:NSUTF8StringEncoding];
mosquitto_subscribe(mosq, NULL, cstrTopic, qos);
}
- (void)unsubscribe: (NSString *)topic
{
const char* cstrTopic = [topic cStringUsingEncoding:NSUTF8StringEncoding];
mosquitto_unsubscribe(mosq, NULL, cstrTopic);
}
- (void) setMessageRetry: (NSUInteger)seconds
{
mosquitto_message_retry_set(mosq, (unsigned int)seconds);
}
- (void) dealloc
{
if (mosq)
{
mosquitto_destroy(mosq);
mosq = NULL;
}
if (timer) {
[timer invalidate];
timer = nil;
}
[super dealloc];
}
// FIXME: how and when to call mosquitto_lib_cleanup() ?
@end
原文地址：http://blog.csdn.net/cerastes/article/details/36904893
