app 服务器的简单搭建 增删数据

服务器代码，主要用来处理用户登陆，用户增加数据 和删除数据

var express = require('express')
var server = express();


//引入bodyParser
var bodyParser = require('body-parser')
// 解析www格式post参数解析器
var urlEncodedParser = bodyParser.urlencoded({extended:true})

//使用中间键进行解析普通请求参数
server.use('/addRoom',urlEncodedParser)


//响应添加房间服务
var roomList = []


//响应登陆服务
server.get('/login',function(req,res)
{
    console.log('有客户端登陆'+ roomList)
    res.send(roomList)    
})


function arrContainrValue(arr, value)
{

    for (var i=0; i< arr.length; i++)
    {
        var room = arr[i]
        if (room.roomID == value)
        {
            console.log('有这个值')
            return true
        }
    }
     return false


}


server.post('/addRoom',function(req,res)
{
    console.log(req.body)
    var roomDic = req.body
    var isHasRoom = arrContainrValue(roomList, roomDic.roomID)
    if (isHasRoom == false)
    {
        roomList.push(roomDic)
        res.send(roomDic)
        console.log('创建一个新的房间')
    }

})

//移除直播间,更改路由
server.get('/removeRoom',function(req,res)
{
    console.log('监听到移除操作'+ ':'+ req.query.roomID)
    var isHasRoom = arrContainrValue(roomList, req.query.roomID)
    console.log(isHasRoom)
    if(isHasRoom == true)
    {
        var index = arrContainrValueIndex(roomList, roomList, req.query.roomI)
        roomList.splice(index,1)
        res.send({'isRemove':true})
    }else
    {
        res.send('room不存在')
    }

})

function arrContainrValueIndex(arr, value)
{

    for (var i=0; i< arr.length; i++)
    {
        var room = arr[i]
        if (room.roomID == value)
        {
            return i
        }
    }

}

server.listen(8080,'192.168.99.158')

console.log('开启监听')

客户端简单搭建，利用服务器响应刷新页面

• 增加数据

- (IBAction)addLiveRoom:(id)sender
{

    RoomItem *room = [RoomItem room];
    
    AFHTTPSessionManager *mgr = [AFHTTPSessionManager manager];
    
    AFHTTPResponseSerializer *serialer = [AFHTTPResponseSerializer serializer];
    serialer.acceptableContentTypes = [NSSet setWithObjects:@"application/json", @"text/json", @"text/javascript", @"text/html", nil];
    mgr.responseSerializer =  serialer;
      
      
    [mgr POST:@"http://192.168.99.158:8080/addRoom" parameters:room.mj_keyValues headers:nil progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject)
    {
        RoomItem *newRoom = [RoomItem mj_objectWithKeyValues:responseObject];
        if (newRoom)
        {
            [self.rooms addObject:newRoom];
            [self.tableView reloadData];
        }
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error)
    {
        NSLog(@"错误%@", error);
          
    }];
}

• 删除数据

    AFHTTPSessionManager *mgr = [AFHTTPSessionManager manager];
    
    //会帮我们处理返回结果，
    AFJSONResponseSerializer *serialer = [AFJSONResponseSerializer serializer];
    serialer.acceptableContentTypes = [NSSet setWithObjects:@"application/json", @"text/json", @"text/javascript", @"text/html", nil];
    mgr.responseSerializer =  serialer;
    RoomItem *item = self.rooms[indexPath.row];
    NSDictionary *paragemter = item.mj_keyValues;
    [mgr GET:@"http://192.168.99.158:8080/removeRoom" parameters:paragemter headers:nil progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject)
    {
        NSLog(@"%@",responseObject);
        //NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:responseObject options:nil error:nil];
        NSDictionary *dic = (NSDictionary *)responseObject;
        if (self.rooms.count > 0)
        {
            [self.rooms removeObjectAtIndex:indexPath.row];
            [self.tableView reloadData];
            
        }
        
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error)
    {
        NSLog(@"删除出错%@", error);
        
    }];