iOS 基于GCDAsyncSocket 封装 TCP（重连，断
1. .h文件
#import <Foundation/Foundation.h>
#import <GCDAsyncSocket.h>
@interfaceSingleTcpCase :NSObject
@property(strong,nonatomic)GCDAsyncSocket *asyncTcpSocket;
/** 单利初始化 */
+(instancetype)sharedTcpManager;
/** 建立连接 */
-(void)connectServer;
/** 关闭连接 */
-(void)disConnectServer;
/** 发送数据给服务器 */
-(void)sendDataToServer:(id)data;
2. .m文件
#import "SingleTcpCase.h"
#define WSELF __weak typeof(self) wself = self;
/** 主线程异步队列 */
#define Dispatch_main_async_safe(block)\
if ([NSThread isMainThread]) {\
block();\
} else {\
dispatch_async(dispatch_get_main_queue(), block);\
}
@interface SingleTcpCase() <GCDAsyncSocketDelegate>
/** 心跳计时器 */
@property (nonatomic, strong) NSTimer *heartBeatTimer;
/** 没有网络的时候检测网络定时器 */
@property(nonatomic,strong)NSTimer*netWorkTestingTimer;
/** 存储要发送给服务端的数据 */
@property (nonatomic, strong) NSMutableArray *sendDataArray;
/** 数据请求队列（串行队列） */
@property (nonatomic, strong) dispatch_queue_t queue;
/** 重连时间 */
@property (nonatomic, assign) NSTimeInterval reConnectTime;
/** 用于判断是否主动关闭长连接，如果是主动断开连接，连接失败的代理中，就不用执行 重新连接方法 */
@property (nonatomic, assign) BOOL isActivelyClose;
/** 缓存区域 */
@property (nonatomic, strong) NSMutableData *readBuf;
@end
@implementation SingleTcpCase
#pragma mark - 🔥🔥🔥🔥🔥🔥🔥🔥
#pragma mark ----单利------
/** 单利 */
+ (instancetype)sharedTcpManager
{
staticSingleTcpCase*_instace =nil;
staticdispatch_once_tonceToken;
dispatch_once(&onceToken,^{
_instace = [[selfalloc]init];
DLogInfo(@"TCP 单利实例化!");
});
return_instace;
}
#pragma mark ----初始化------
/** 初始化 */
- (instancetype)init
{
self= [superinit];
if(self)
{
self.reConnectTime = 0;
self.isActivelyClose = NO;
self.queue = dispatch_queue_create("BF",NULL);
self.sendDataArray = [[NSMutableArray alloc] init];
self.mRecvPacket = [JHreceivePacket sharedManager];
self.deviceListArr = [[NSMutableArray alloc] init];
DLogInfo(@"初始化！");
}
return self;
}
#pragma mark - 🔥🔥🔥🔥🔥🔥🔥🔥
#pragma mark --- 心跳计时器处理 -----
/** 心跳计时器初始化 */
- (void)initHeartBeat
{
//心跳没有被关闭
if(self.heartBeatTimer)
{
return;
}
[self destoryHeartBeat];
//连接成功 先发一次 心跳数据 在打开计时器
[[JHSocketData sharedManager] heartbeat];
[self.asyncTcpSocket writeData:[[JHSocketData sharedManager]getWillSendFrame] withTimeout:30 tag:0];
WSELF
Dispatch_main_async_safe(^{
wself.heartBeatTimer = [NSTimer timerWithTimeInterval:30target:wself selector:@selector(senderheartBeat) userInfo:nilrepeats:true];
[[NSRunLoop currentRunLoop]addTimer:wself.heartBeatTimer forMode:NSRunLoopCommonModes];
});
}
#pragma mark --- 取消心跳 -----
/** 取消心跳 */
- (void)destoryHeartBeat
{
WSELF
Dispatch_main_async_safe(^{
if(wself.heartBeatTimer)
{
[wself.heartBeatTimer invalidate];
wself.heartBeatTimer =nil;
}
});
}
#pragma mark --- 没有网络的时候开始定时 -- 用于网络检测 -----
/** 没有网络，进行网络监测 */
- (void)noNetWorkStartTestingTimer
{
WSELF
Dispatch_main_async_safe(^{
wself.netWorkTestingTimer = [NSTimer scheduledTimerWithTimeInterval:1.0target:wself selector:@selector(noNetWorkStartTesting) userInfo:nilrepeats:YES];
[[NSRunLoop currentRunLoop] addTimer:wself.netWorkTestingTimer forMode:NSDefaultRunLoopMode];
});
}
#pragma mark --- 取消网络监测 ----
/** 取消网络监测 */
- (void)destoryNetWorkStartTesting
{
WSELF
Dispatch_main_async_safe(^{
if(wself.netWorkTestingTimer)
{
[wself.netWorkTestingTimer invalidate];
wself.netWorkTestingTimer =nil;
}
});
}
#pragma mark - 🔥🔥🔥🔥🔥🔥🔥🔥
#pragma mark --- 发送心跳 ---
/** 发送心跳 */
- (void)senderheartBeat
{
// 和服务端约定好发送什么作为心跳标识，尽可能的减小心跳包大小
[self.asyncTcpSocket writeData:你的数据 withTimeout:30 tag:0];
// WSELF;
// Dispatch_main_async_safe(^{
//
// });
}
#pragma mark --- 定时检查网络 ---
/** 定时检查网络 */
- (void)noNetWorkStartTesting
{
//有网络
if(AFNetworkReachabilityManager.sharedManager.networkReachabilityStatus != AFNetworkReachabilityStatusNotReachable)
{
//关闭网络检测定时器
[self destoryNetWorkStartTesting];
//开始重连
[self reConnectServer];
}
}
#pragma mark - 🔥🔥🔥🔥🔥🔥🔥🔥
#pragma mark ----建立连接------
/** 建立连接 */
-(void)connectServer{
self.isActivelyClose = NO;
NSError*error =nil;
_asyncTcpSocket= [[GCDAsyncSocket alloc]initWithDelegate:self delegateQueue:dispatch_get_main_queue()];
//你的ip地址和端口号
[_asyncTcpSocket connectToHost:@"255.255.253.108" onPort:8989 withTimeout:60 error:&error];
if(error) {
DLogInfo(@"TCP连接错误:%@", error);
}
[self.asyncTcpSocket readDataWithTimeout:-1 tag:0];
}
#pragma mark --- 重连服务器 ---
/** 重连服务器 */
- (void)reConnectServer{
if (self.asyncTcpSocket.isConnected) {
return;
}
if (self.reConnectTime > 1024) {
self.reConnectTime = 0;
return;
}
WSELF;
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(self.reConnectTime *NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
if(wself.asyncTcpSocket.isConnected)
{
return;
}
[wselfconnectServer];
DLogInfo(@"正在重连");
if(wself.reConnectTime==0) //重连时间2的指数级增长
{
wself.reConnectTime=2;
}
else
{
wself.reConnectTime*=2;
}
});
DLogInfo(@"重连服务器！");
}
#pragma mark ----关闭连接------
/** 关闭连接 */
- (void)disConnectServer {
NSLog(@"dealloc");
// 关闭套接字
self.isActivelyClose = YES;
[self.asyncTcpSocket disconnect];
//关闭心跳定时器
[self destoryHeartBeat];
//关闭网络检测定时器
[self destoryNetWorkStartTesting];
self.asyncTcpSocket = nil;
}
#pragma mark ---代理 连接成功 ---
//连接成功
-(void)socket:(GCDAsyncSocket*)sock didConnectToHost:(NSString*)host port:(uint16_t)port
{
DLogInfo(@"TCP连接成功!");
// [self.asyncTcpSocket readDataWithTimeout:-1 tag:index];
// [self.asyncTcpSocket readDataWithTimeout:-1 tag:0];
// 存储接收数据的缓存区，处理数据的粘包和断包
self.readBuf =[[NSMutableData alloc]init];
[self initHeartBeat]; //开启心跳
//如果有尚未发送的数据，继续向服务端发送数据
if([self.sendDataArraycount] >0){
[self sendeDataToServer];
}
}
#pragma mark ---代理 连接失败 ---
//连接失败 进行重连操作
-(void)socketDidDisconnect:(GCDAsyncSocket*)sock withError:(NSError*)err
{
//用户主动断开连接，就不去进行重连
if(self.isActivelyClose)
{
return;
}
[self destoryHeartBeat]; //断开连接时销毁心跳
//判断网络环境
if (AFNetworkReachabilityManager.sharedManager.networkReachabilityStatus == AFNetworkReachabilityStatusNotReachable) //没有网络
{
[self noNetWorkStartTestingTimer];//开启网络检测定时器
}
else//有网络
{
[self reConnectServer];//连接失败就重连
}
DLogInfo(@"TCP连接失败!");
}
#pragma mark --- 消息发送成功 ---
-(void)socket:(GCDAsyncSocket*)sock didWriteDataWithTag:(long)tag
{
NSLog(@"TCP发送成功");
}
#pragma mark - 🔥🔥🔥🔥🔥🔥🔥🔥
#pragma mark --- 发送数据 ---
-(void)sendDataToServer:(id)data{
[self.sendDataArrayaddObject:data];
[self sendeDataToServer];
// [self.asyncTcpSocket writeData:data withTimeout:60 tag:0];
}
#pragma mark --- 发送数据给服务器 详细处理 ---
/** 发送数据的详细处理 */
-(void)sendeDataToServer{
WSELF
//把数据放到一个请求队列中
dispatch_async(self.queue, ^{
//网络判断 没有网络的情况
if (AFNetworkReachabilityManager.sharedManager.networkReachabilityStatus == AFNetworkReachabilityStatusNotReachable) {
//开启网络检测定时器
[wselfnoNetWorkStartTestingTimer];
}else//有网络情况
{
//判断对象是否存在
if(wself.asyncTcpSocket!=nil) {
//判断TCP是否处于连接状态
if(wself.asyncTcpSocket.isConnected) {
//判断数据 是否存在
if(wself.sendDataArray.count>0)
{
idsendData = wself.sendDataArray[0];
DLogWarn(@"TCP发送出去的数据: %@",sendData);
[self.asyncTcpSocket writeData:sendDatawithTimeout:30tag:0];
[wself.sendDataArrayremoveObjectAtIndex:0];
if([wself.sendDataArraycount] >0)
{
[wselfsendeDataToServer];
}
}
}else{
//TCP 处于断开状态
//主动去重连服务器 连接成功后 继续发送数据
[wselfreConnectServer];
}
}else{
[wselfreConnectServer];
}
}
});
}
#pragma mark - 🔥🔥🔥🔥🔥🔥🔥🔥
#pragma mark --- 接收的数据 ---
-(void)socket:(GCDAsyncSocket*)sock didReadData:(NSData*)data withTag:(long)tag
{
// sleep(1);
//此方法处理数据的黏包或者断包
myLOG(@"原始数据%@",data);
//断包处理
[self didReadData:data];
// [self disposeBufferData:data];
[self.asyncTcpSocket readDataWithTimeout:-1 tag:0];
}
#pragma mark - 🔥🔥🔥🔥🔥🔥🔥🔥
#pragma mark --- 黏包 断包处理 ---
-(void) didReadData:(NSData*)data {
//断包处理 要根据 你的 数据的 长度标识位的数据 来判断 读到什么地方 才是你完整的数据。根据协议去走
_readBuf = [NSMutableData dataWithData:data];
// 取出4-8位保存的数据长度，计算数据包长度
while(_readBuf.length>=5) {// 头数据为5个字节
// 得到数据的ID 和 整个数据的长度
NSData *dataLength = [_readBuf subdataWithRange:NSMakeRange(3, 2)];
Byte*ByteLength = (Byte*)[dataLengthbytes];
intheadLen = (ByteLength[0] &0x00ff) + ((ByteLength[1] &0x00ff) <<8);
NSIntegerlengthInteger =0;
lengthInteger = (NSInteger)headLen;
NSIntegercomplateDataLength = lengthInteger +6;//算出一个包完整的长度(内容长度＋头长度)
myLOG(@"已读取数据：缓冲区长度：%ld, 接收长度：%lu 数据长度:%ld ", (long)_readBuf.length, (unsignedlong)[data length], complateDataLength);
// NSInteger dataLength = length + 2;
if(_readBuf.length>= complateDataLength) {//如果缓存中的数据 够 一个整包的长度
NSData*msgData = [_readBufsubdataWithRange:NSMakeRange(0, complateDataLength)];
// 处理消息数据
// myLOG(@"得到完整包数据:%@",msgData);
// 从缓存中截掉处理完的数据，继续循环
_readBuf= [NSMutableDatadataWithData:[_readBufsubdataWithRange:NSMakeRange(complateDataLength,_readBuf.length- complateDataLength)]];
// [self.asyncTcpSocket readDataWithTimeout:-1 tag:0];
}else{// 断包情况，继续读取
// [self.asyncTcpSocket readDataWithTimeout:-1 tag:0];
// [sock readDataWithTimeout:-1 buffer:_readBuf bufferOffset:_readBuf.length tag:0];//继续读取数据
[self.asyncTcpSocket readDataWithTimeout:-1 buffer:_readBuf bufferOffset:_readBuf.length tag:0];
return;
}
[self.asyncTcpSocket readDataWithTimeout:-1 buffer:_readBuf bufferOffset:_readBuf.length tag:0];//继续读取数据
}
}
