Question

好吧，我被卡住了。我有一个棘手的问题，让我的自定义表格视图单元格转换为＆＃39;详细信息＆＃39;我的Master-Detail应用程序的一部分，this other StackOverflow post修复它，调用prepareForSegue函数。我仍然没有得到我期望的结果，我发现了一个大问题：将单元格的属性传递给细节部分需要选择一个单元格，并且该帖子的代码会立即取消选择单元格在segue之前。看起来像一个简单的修复，但是当我删除该行时，程序在单击一个单元格时崩溃了。我真的不知道该怎么做（100％的iOS经验来自过去48小时），我希望有人可以提供帮助。

参与的代码：

    <?php
date_default_timezone_set ('AMERICA/SANTIAGO');   
$dbhost = getenv('OPENSHIFT_MYSQL_DB_HOST').':'.getenv('OPENSHIFT_MYSQL_DB_PORT');
$dbusername = getenv('OPENSHIFT_MYSQL_DB_USERNAME');
$dbpassword = getenv('OPENSHIFT_MYSQL_DB_PASSWORD');
$db_name = 'tuhoramedica';
$mysqlCon = mysqli_connect($dbhost, $dbusername, $dbpassword, "", $dbport) or die ("Disculpa, estamos teniendo algunas dificultades técnicas, por favor intentalo nuevamente más tarde. Gracias por tu comprensión.\n");
mysqli_select_db($mysqlCon, $db_name) or die("Disculpa, estamos teniendo algunas dificultades técnicas, por favor intentalo nuevamente más tarde. Gracias por tu comprensión.\n");
//Prevent SQL Injection
$usuario=mysqli_real_escape_string($mysqlCon, $_POST['user']);
$password=mysqli_real_escape_string($mysqlCon, $_POST['pass']);
stripslashes($user);
stripslashes($password);
$sql = "select * from usuarios where username='".$usuario."' and pswd='".$password."'";
$result=$mysqlCon->query($sql);
if ($result->num_rows === 1) {
    session_start();
    $row = $result->fetch_assoc();
    //echo "Bienvenido " . $row["nombre"]." ".$row["apellido"];
    $_SESSION["nr_usuario"] = $row["nr_usuario"];
    $_SESSION["nombre_usuario"] = $row["nombre"];
    $_SESSION["apellido_usuario"] = $row["apellido"];
    $_SESSION["mail_usuario"] = $row["mail"];
    $_SESSION["username_usuario"] = $row["username"];
    $_SESSION["autentica"] = "SIP";
    header("Location: http://tuhoramedica-chakana.rhcloud.com/filtro_horas.php");
    exit;
} else {
    echo "Lo sentimos, su usuario y/o contraseña no coinciden.";
}
$mysqlCon->close();
?>

错误（当我删除取消选择行时）：

 override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if segue.identifier == "showDetail" {
        if let indexPath = self.tableView.indexPathForSelectedRow {
            let object = objects[indexPath.row]
            let controller = (segue.destinationViewController as! UINavigationController).topViewController as! DetailViewController
            controller.detailItem = object
            controller.navigationItem.leftBarButtonItem = self.splitViewController?.displayModeButtonItem()
            controller.navigationItem.leftItemsSupplementBackButton = true
        }
    }
}

override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
    let cell = tableView.cellForRowAtIndexPath(indexPath)
    tableView.deselectRowAtIndexPath(indexPath, animated: false) // What appears to be the problem
    performSegueWithIdentifier("showDetail", sender: cell)
}

（在弹出的编辑器中：THREAD 1：EXC_BREAKPOINT）

感谢所有帮助。

Answer 1

你尝试输入这样的代码：

override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
    let cell = tableView.cellForRowAtIndexPath(indexPath)
    performSegueWithIdentifier("showDetail", sender: cell)
    tableView.deselectRowAtIndexPath(indexPath, animated: false) // What appears to be the problem
}

但是我觉得你应该把你想要的对象发送到didSelectRowAtIndexpath的下一个屏幕并将其传递给performSegue，如下所示：

override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
     let object = objects[indexPath.row]
     performSegueWithIdentifier("showDetail", sender: object)
     tableView.deselectRowAtIndexPath(indexPath, animated: false) 
}


 override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if segue.identifier == "showDetail" {
        if let object = sender as! "type of object" {

            let controller = (segue.destinationViewController as! UINavigationController).topViewController as! DetailViewController
            controller.detailItem = object
            controller.navigationItem.leftBarButtonItem = self.splitViewController?.displayModeButtonItem()
            controller.navigationItem.leftItemsSupplementBackButton = true
       }
   }
}

希望这有帮助！

主细节应用程序indexPathForSelectedRow问题

1 个答案: