iOS_POST_网络请求

#pragma mark - 同步的 post 请求
- (IBAction)POSTSynButtonDidClicked:(UIButton *)sender {

// 1、拼接 baseUrlString
NSString *baseUrlString = @"http://ipad-bjwb.bjd.com.cn/DigitalPublication/publish/Handler/APINewsList.ashx";

// 2、根据字符串创建 URL(统一资源定位符)
NSURL *url = [NSURL URLWithString:baseUrlString];

// 3、创建可变的 request 对象
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];

// 1> 设置请求类型为 POST (默认为 GET)
[request setHTTPMethod:@"POST"];

// 2> 需要设置 POST 参数
NSString *bodyString = @"date=20131129&startRecord=1&len=5&udid=1234567890&terminalType=Iphone&cid=213";
// 把字符串转化为 NSData
NSData *bodyData = [bodyString dataUsingEncoding:NSUTF8StringEncoding];
[request setHTTPBody:bodyData];

// 4、请求数据（同步）
NSData *receiveData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];

// 5、系统自带json解析
NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:receiveData options:(NSJSONReadingMutableContainers) error:nil];

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

self.newsArray = [NSMutableArray array];

for (NSDictionary *smallDict in array) {
NewsModal *modal = [[NewsModal alloc] init];
[modal setValuesForKeysWithDictionary:smallDict];
[self.newsArray addObject:modal];
}

for (NewsModal *modal in self.newsArray) {
NSLog(@"%@", modal.title);
}
}

#pragma mark - 异步的 post 请求
- (IBAction)POSTAsynButtonDidClicked:(UIButton *)sender {

// 1、拼接 baseUrlString
NSString *baseUrlString = @"http://ipad-bjwb.bjd.com.cn/DigitalPublication/publish/Handler/APINewsList.ashx";

// 2、根据字符串创建 url（统一资源定位符）
NSURL *url = [NSURL URLWithString:baseUrlString];

// 3、创建可变 request 对象
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];

// 设置 request 对象的相关属性
// 1>设置默认请求类型为 POST
[request setHTTPMethod:@"POST"];

// 2>设置POST参数
NSString *bodyString = @"date=20131129&startRecord=1&len=5&udid=1234567890&terminalType=Iphone&cid=213";
// 3>把字符串转化为 NSData
NSData *bodyData = [bodyString dataUsingEncoding:NSUTF8StringEncoding];
[request setHTTPBody:bodyData];

// 4、请求数据(异步)
[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {

// 5、系统自带json解析
NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:(NSJSONReadingMutableContainers) error:nil];

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

self.newsArray = [NSMutableArray array];

for (NSDictionary *smallDict in array) {
NewsModal *modal = [[NewsModal alloc] init];
[modal setValuesForKeysWithDictionary:smallDict];
[self.newsArray addObject:modal];
}

for (NewsModal *modal in self.newsArray) {
NSLog(@"%@", modal.title);
}

// 对 tableView 进行 reloadData 否则第一次不显示内容
}];

}