iOS使用GCDSocketManager实现长连接的方法

#import <Foundation/Foundation.h>
#import "GCDAsyncSocket.h"
@interface GCDSocketManager : NSObject
@property(nonatomic,strong) GCDAsyncSocket *socket;
//单例
+ (instancetype)sharedSocketManager;
//连接
- (void)connectToServer;
//断开
- (void)cutOffSocket;
@end

.m文件

#import "GCDSocketManager.h"
#define SocketHost @"地址"
#define SocketPort 端口
@interface GCDSocketManager()<GCDAsyncSocketDelegate>
//握手次数
@property(nonatomic,assign) NSInteger pushCount;
//断开重连定时器
@property(nonatomic,strong) NSTimer *timer;
//重连次数
@property(nonatomic,assign) NSInteger reconnectCount;
@end
@implementation GCDSocketManager
//全局访问点
+ (instancetype)sharedSocketManager {
static GCDSocketManager *_instance = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
_instance = [[self alloc] init];
});
return _instance;
}
//可以在这里做一些初始化操作
- (instancetype)init
{
self = [super init];
if (self) {
}
return self;
}
#pragma mark 请求连接
//连接
- (void)connectToServer {
self.pushCount = 0;
self.socket = [[GCDAsyncSocket alloc] initWithDelegate:self delegateQueue:dispatch_get_main_queue()];
NSError *error = nil;
[self.socket connectToHost:SocketHost onPort:SocketPort error:&error];
if (error) {
DLog(@"SocketConnectError:%@",error);
}
}
#pragma mark 连接成功
//连接成功的回调
- (void)socket:(GCDAsyncSocket *)sock didConnectToHost:(NSString *)host port:(uint16_t)port {
DLog(@"socket连接成功");
[self sendDataToServer];
}
//连接成功后向服务器发送数据
- (void)sendDataToServer {
//发送数据代码省略...
//发送
[self.socket writeData:jsonData withTimeout:-1 tag:1];
//读取数据
[self.socket readDataWithTimeout:-1 tag:200];
}
//连接成功向服务器发送数据后,服务器会有响应
- (void)socket:(GCDAsyncSocket *)sock didReadData:(NSData *)data withTag:(long)tag {
[self.socket readDataWithTimeout:-1 tag:200];
//服务器推送次数
self.pushCount++;
//在这里进行校验操作,情况分为成功和失败两种,成功的操作一般都是拉取数据
}
#pragma mark 连接失败
//连接失败的回调
- (void)socketDidDisconnect:(GCDAsyncSocket *)sock withError:(NSError *)err {
DLog(@"Socket连接失败");
self.pushCount = 0;
NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
NSString *currentStatu = [userDefaults valueForKey:@"Statu"];
//程序在前台才进行重连
if ([currentStatu isEqualToString:@"foreground"]) {
//重连次数
self.reconnectCount++;
//如果连接失败 累加1秒重新连接 减少服务器压力
NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:1.0 * self.reconnectCount target:self selector:@selector(reconnectServer) userInfo:nil repeats:NO];
self.timer = timer;
}
}
//如果连接失败,5秒后重新连接
- (void)reconnectServer {
self.pushCount = 0;
self.reconnectCount = 0;
//连接失败重新连接
NSError *error = nil;
[self.socket connectToHost:SocketHost onPort:SocketPort error:&error];
if (error) {
DLog(@"SocektConnectError:%@",error);
}
}
#pragma mark 断开连接
//切断连接
- (void)cutOffSocket {
DLog(@"socket断开连接");
self.pushCount = 0;
self.reconnectCount = 0;
[self.timer invalidate];
self.timer = nil;
[self.socket disconnect];
}
@end

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