同步的 post 請求

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

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

    // 2、根據字符串創建 URL(統一資源定位符)
    NSURL *url = [NSURL URLWithString:baseUrlString];

    // 3、創建可變的 request 對象
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];

    // 1> 設置請求類型為 POST (默認為 GET)
    [request setHTTPMethod:@POST];

    // 2> 需要設置 POST 參數
    NSString *bodyString = @date=20131129&startRecord=1&len=5&udid=1234567890&terminalType=Iphone&cid=213;
    // 把字符串轉化為 NSData
    NSData *bodyData = [bodyString dataUsingEncoding:NSUTF8StringEncoding];
    [request setHTTPBody:bodyData];

    // 4、請求數據（同步）
    NSData *receiveData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];

    // 5、系統自帶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);
    }
}

異步的 post 請求

#pragma mark - 異步的 post 請求
- (IBAction)POSTAsynButtonDidClicked:(UIButton *)sender {

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

    // 2、根據字符串創建 url（統一資源定位符）
    NSURL *url = [NSURL URLWithString:baseUrlString];

    // 3、創建可變 request 對象
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];

    // 設置 request 對象的相關屬性
    // 1>設置默認請求類型為 POST
    [request setHTTPMethod:@POST];

    // 2>設置POST參數
    NSString *bodyString = @date=20131129&startRecord=1&len=5&udid=1234567890&terminalType=Iphone&cid=213;
    // 3>把字符串轉化為 NSData
    NSData *bodyData = [bodyString dataUsingEncoding:NSUTF8StringEncoding];
    [request setHTTPBody:bodyData];

    // 4、請求數據(異步)
    [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {

        // 5、系統自帶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);
        }

        // 對 tableView 進行 reloadData 否則第一次不顯示內容
    }];


}