网络编程-POST同步和异步(block和delegate)

注:接收到的数据模式和GET的一样,都是news，在此不写了

Post的同步请求方法-需要设置请求方式为:post,也要设置url和body

//POST请求时的url

#define POST_URL @"http://ipad-bjwb.bjd.com.cn/DigitalPublication/publish/Handler/APINewsList.ashx"

#define POST_BODY @"date=20150921&startRecord=1&len=5&udid=1234567890&terminalType=Iphone&cid=213"

#pragma mark==============POST 同步请求==================

- (IBAction)postSynchronizationAction:(id)sender

{

//1.创建url

NSURL *url = [NSURL URLWithString:POST_URL];

//2.创建请求对象

NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:url];

//设置请求方法

request.HTTPMethod = @"POST";

//3.创建BODY

NSData *bodyData = [POST_BODY dataUsingEncoding:NSUTF8StringEncoding];

//设置请求数据

request.HTTPBody = bodyData;

//4.连接，请求数据

NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];

/*---------------------数据解析----------------------*/

NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:nil];

NSArray *array = dict[@"news"];

_dataArray = [[NSMutableArray alloc] initWithCapacity:5];

for (NSDictionary *dic in array) {

News *news = [News new];

[news setValuesForKeysWithDictionary:dic];

[_dataArray addObject:news];

}

for (News *news in _dataArray) {

NSLog(@"%@",news);

}

}

POST的异步请求-Block

#pragma mark=========================POST 异步请求=======================

- (IBAction)postAsynchorization:(id)sender

{

// //1.设置url对象

NSURL *url = [[NSURL alloc] initWithString:POST_URL];

//

// //2.设置请求对象

NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:url];

//设置请求方式

request.HTTPMethod = @"POST";

//设置请求数据

NSData *dataBody = [POST_BODY dataUsingEncoding:NSUTF8StringEncoding];

request.HTTPBody = dataBody;

//接收请求，并作出响应

[NSURLConnection sendAsynchronousRequest:request queue: [NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response,NSData *data,NSError *connectionError){

//解析数据

NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:nil];

_dataArray = [NSMutableArray arrayWithCapacity:8];

//封装model对象

for (NSDictionary *dic in dict[@"news"]) {

News *news = [News new];

[news setValuesForKeysWithDictionary:dic];

[_dataArray addObject:news];

}

//校验

for (News *news in _dataArray) {

NSLog(@"%@",news);

}

}];

POST的异步请求--delegate方法

#pragma mark=================POST 异步请求 代理方法===================

- (IBAction)postAsynchorizationDelegateAction:(id)sender

{

//1、创建url对象

NSURL *url = [NSURL URLWithString:POST_URL];

//2、创建请求对象

NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:url];

//设置请求方法

request.HTTPMethod = @"POST";

//将数据编码成二进制

NSData *data = [POST_BODY dataUsingEncoding:NSUTF8StringEncoding];

//设置请求数据

request.HTTPBody = data;

//3.创建连接

NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];

//4.连接开始

[connection start];

}

//1.

-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response

{

//收到服务器响应后开始准备数据

_dataArray = [[NSMutableArray alloc] initWithCapacity:6];

_allData = [[NSMutableData alloc] initWithCapacity:30];

}

-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data

{

[_allData appendData:data];

}

-(void)connectionDidFinishLoading:(NSURLConnection *)connection

{

//解析数据

NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:_allData options:NSJSONReadingAllowFragments error:nil];

//根据键值获得对应的数组

NSArray *array = dict[@"news"];

//封装model对象(model对象方便修改和管理，而且model可以加方法)

for (NSDictionary *dic in array) {

News *news = [News new];

[news setValuesForKeysWithDictionary:dic];

[_dataArray addObject:news];

}

//校验

for (News *news in _dataArray) {

NSLog(@"%@",news);

}

}