iPhone App Dev – 从PHP发送和接收数据

我将一个变量“部分”从我的iPhone应用程序POST到一个PHP Web服务.在查询数据库以进行数据检索之前,此Web检查是否设置了部分.

我使用以下方法发布数据：

+(void)getQuestions:(NSInteger)sectionId from: (Nsstring*) url{
    //connect to database given by url
    NSMutableString* myRequestString = [[NSMutableString string]initWithFormat:@"section=%@", sectionId];
    NSData *myRequestData = [NSData dataWithBytes: [myRequestString UTF8String] length: [myRequestString length]];
    NSMutableuRLRequest *request = [[NSMutableuRLRequest alloc] initWithURL: [NSURL URLWithString: url]]; 
    [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"content-type"];
    [request setHTTPMethod: @"POST"];
    //post section 
    [request setHTTPBody: myRequestData];
} 

在同一个方法中我想捕获PHP文件回显的数组：

<?PHP

//connect to database
function connect() {
  $dbh = MysqL_connect ("localhost", "abc", "defgo") or die ('I cannot connect to the database because: ' . MysqL_error());
  MysqL_select_db("PDS", $dbh); 
  return $dbh;
}

//store posted data
if(isset($_POST['section'])){
  $dbh = connect();
  $section = $_POST['section'];
  $query = MysqL_query("SELECT * FROM QUESTIONS WHERE sectionId = $section;") or die("Error: " . MysqL_error());;

  $rows = array();
  while($r = MysqL_fetch_assoc($query)) {
    $rows[] = $r;
  }      
  echo $rows;
  MysqL_close();
}
?>

目标C API的哪个部分允许您捕获响应数据？如何修改上面的目标c函数来存储$rows变量？

$rows变量是一个存储来自数据库的元组的关联数组.

解决方法:

我在你的另一个问题中回答了这个问题,但我也会在这里回答.您可以使用NSURLConnectionDelegate捕获响应,并提醒您任何问题.

看一下URL Loading System Programming Guide – 它的例子非常全面.