Kevtho's questions

Best regard. I work on an application which has a list of items, each item in the list is composed of a custom cell (TableViewCell) which contains 1 textfield and several labels. I'm trying to capture the value change event of the textfield in the cell. So far I have this code but I can't capture the event... Any ideas?

TableViewCell

class TableViewCell: UITableViewCell, UITextFieldDelegate{

    @IBOutlet weak var imagen: UIImageView!
    @IBOutlet weak var producto: UILabel!
    @IBOutlet weak var precio: UILabel!
    @IBOutlet weak var cantidad: UITextField?
    @IBOutlet weak var stock: UILabel!

    override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
        cantidad?.delegate = self
        self.contentView.addSubview(cantidad!)
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }

    @IBAction func txtCantidad_onChange(_ sender: Any) {
        if cantidad?.text != "0" {
           print("Cambio con valor != a 0")
        }else{
            print("Cambio con valor 0")
        }
    }
}

The code shown above is just an example, but I actually want to execute all the code from the didSelectRowAt method of the tableView

The table startup code is housed in a separate ViewController

ViewController

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return arrProductosDetalle.count
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
            let celda = Bundle.main.loadNibNamed("ProductoViewCell", owner: self, options: nil)?.first as! ProductoViewCell
            let aux = arrProductos[indexPath.row] as! Producto

            let dataDecoded:NSData = NSData(base64Encoded: aux.imagen, options: NSData.Base64DecodingOptions(rawValue: 0))!
            let decodedimage:UIImage = UIImage(data: dataDecoded as Data)!
            celda.imagen.image = decodedimage
            celda.producto.text = aux.nombre
            celda.precio.text = "Precio: $\(Formato().Double2String(valor: aux.precioVenta))"
            celda.stock.text = "En stock \((arrProductos[indexPath.row] as! Producto).stock)"
            return celda
    }

    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
            let celda = tableView.cellForRow(at: indexPath)
            let aux = arrProductos[indexPath.row] as! Producto

            if (celda?.isSelected)! {
                if  (celda as! ProductoViewCell).cantidad?.text != "" {
                    if ((celda as! ProductoViewCell).cantidad?.text?.isInt)! && (celda as! ProductoViewCell).cantidad?.text != "0"{
                        if Int(((celda as! ProductoViewCell).cantidad?.text)!)! <= aux.stock
                        {
                            let nuevo: PedidoDetalle = PedidoDetalle()
                            nuevo.idProducto = aux.id;
                            nuevo.precioUnitario = aux.precioVenta
                            nuevo.cantidad = Int(((celda as! ProductoViewCell).cantidad?.text)!)!
                            nuevo.precioSubtotal = (nuevo.precioUnitario * Double(nuevo.cantidad))
                            nuevo.idParametrizacion = 1
                            arrProductosDetalle.add(nuevo)
                            lstPedidoDetalle.reloadData()
                            lblTotal.text = Formato().Double2String(valor: calcularTotal())
                            celda?.accessoryType = .checkmark
                        }else{
                            celda?.isSelected = false
                            Mensaje().mensaje(controller: self,texto: "El stock no es suficiente")
                        }
                    }else{
                        celda?.isSelected = false
                        (celda as! ProductoViewCell).cantidad?.text = ""
                        Mensaje().mensaje(controller: self, texto: "Tipo de dato no valido o valor no valido")
                    }
                }else{
                celda?.isSelected = false
                Mensaje().mensaje(controller: self,texto: "Primero defina la cantidad de este producto")}
            }else{

            }
    }

    func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
        if tableView == lstPedidos{
            let celda = tableView.cellForRow(at: indexPath)
            let aux = arrProductos[indexPath.row] as! Producto
            let nuevo: PedidoDetalle = PedidoDetalle()
            nuevo.idProducto = aux.id;
            nuevo.precioUnitario = aux.precioVenta
            nuevo.cantidad = Int(((celda as! ProductoViewCell).cantidad?.text)!)!
            nuevo.precioSubtotal = (nuevo.precioUnitario * Double(nuevo.cantidad))
            //arrPedidoProducto.add(nuevo)
            for item in arrProductosDetalle
            {
                let aux = item as! PedidoDetalle
                if(aux.idProducto == nuevo.idProducto && aux.cantidad == nuevo.cantidad)
                {
                    arrProductosDetalle.remove(aux)
                }
            }
            //arrProductosDetalle.removeObject(identicalTo: nuevo)
            (celda as! ProductoViewCell).cantidad?.text = ""
            celda?.accessoryType = .none
            lstPedidoDetalle.reloadData()
            lblTotal.text = Formato().Double2String(valor: calcularTotal())

        }
    }

Hi all guys. I have a comparison of two attributes (string?) with their respective entered texts. The attributes are as follows

class Usuario: NSObject {

    var id:Int = Int()
    var idPrivilegio:Int = Int()
    var correo:String?
    var clave:String?

func buscar(incluirInactivo: Bool)-> NSMutableArray
    {
        conexion.database!.open()

        var stringConsulta = "select * from USUARIO"
        let consulta: FMResultSet! = conexion.database!.executeQuery(stringConsulta, withArgumentsIn: nil)
        let listaUsuarios: NSMutableArray = NSMutableArray()

        if (consulta != nil)
        {
            while consulta.next(){
                let itemUsuario: Usuario = Usuario()
                itemUsuario.id = Int(consulta.int(forColumn: "CODIGOUSUARIO"))
                itemUsuario.idPrivilegio = Int(consulta.int(forColumn: "CODIGOPRIVILEGIO"))
                itemUsuario.correo = consulta.string(forColumn: "CORREOUSUARIO")
                itemUsuario.clave = consulta.string(forColumn: "CLAVEUSUARIO")
                listaUsuarios.add(itemUsuario)
            }
        }
        conexion.database!.close()
        return listaUsuarios
    }

    func insertar(itemUsuario: Usuario) ->Bool
    {
        conexion.database!.open()
        let consulta: Bool = conexion.database!.executeUpdate("insert into USUARIO (CODIGOPRIVILEGIO,CORREOUSUARIO,CLAVEUSUARIO) values (\(itemUsuario.idPrivilegio),'\(String(describing: itemUsuario.correo))','\(String(describing: itemUsuario.clave))'", withArgumentsIn: nil)
        conexion.database!.close()
        let aux = !consulta ?  false : true
        return aux
    }
}

The comparison is made with this line

if(usuario.correo! == txtCorreo.text && usuario.clave! == txtPassword.text){
//codigo
}

But it does not generate the comparison properly, in the debug process the variables are shown as follows

The comparison always gives me false. Please help with this inconvenience

I am looking for a way to make a floating list (TableView inside AlertView) with data from a list of objects and that when clicking on an element gives me the reference to the selected object.

For this I am using an action sheet and a for loop as follows

@IBAction func btnVerLista_onClick(_ sender: Any) {
        let alertController = UIAlertController(title: "Action Sheet", message: "Lista de Superheroes", preferredStyle: .actionSheet)

        for item in arrSuperHeroes{

            let superbutton = UIAlertAction(title: (item as! SuperHeroe).nombre , style: .default, handler: { (action) -> Void in
                self.superSel = item as! SuperHeroe
                print(self.superSel.nombre)
        })
        alertController.addAction(superbutton)
        }

        self.navigationController!.present(alertController, animated: true, completion: nil)
    }

But I always have this error when executing the last line

fatal error: unexpectedly found nil while unwrapping an Optional value (lldb)

Could someone help me with the idea of ​​the error or if there is another way to do what I need.

I'm trying to make a PDF document through the linux command line.

For this I have previously written a file .texwhich executes perfectly in TexMaker, to generate the PDF I use the command

pdflatex archivo.tex

This is the LaTeX code

\documentclass[12pt, a4paper]{article}
\usepackage{lmodern}
\usepackage[T1]{fontenc}
\usepackage[spanish, activeacute]{babel}
\usepackage{enumerate}
\usepackage{multirow}
\usepackage{xcolor}
\usepackage{graphicx}
\graphicspath{ {/root/Imágenes/} }
\colorlet{LIME GREEN}{green}

\title{\textbf{\textcolor{green}{Tipo de vulnerabilidad \\
\large SPF BAD CONFIGURATION }}}

\begin{document}

\maketitle

El protocolo SPF (Sender Policy Framework) es un protocolo empleado para ...

\begin{figure}[ht]
\includegraphics[width=\linewidth]{funcionamientoSPF}
\centering
\caption{Funcionamienot de SPF}
\end{figure}
....

%\begin{center}
\begin{tabular}{|p{2cm}|p{10cm}|}
\hline
\centering Opci'on & {\centering Descripci'on} \\
\hline 
\hline   %<--------- linea 63
+all & Indica que se autoriza el env'io de correo desde servidores no declarados en el registro\\ 
\hline
~all & Indica que se autoriza el env'io de correo desde servidores no declarados en el registro SPF, recomendando los declarados en el mismo. Es probable que entre como spam si el rando no est'a bien definido\\ 
\hline
-all & Indica que mo se autoriza explicitamte el env'io de correo desde servidores no declarados en el registro SPF\\ \hline
?all & "No se puede decir nada de la validaci'on", el correo es aceptado\\
\hline
\end{tabular}
%\end{center}

Un registro SPF cuidadosamente dise'~nado reducir'a la probabilidad de que el nombre de dominicio se falsifique y evite que los mensajes se marquen como spam antes de que lleguen a sus destinatarios.
\end{document}

And when executing by command line it gives me the following error:

LaTeX Warning: No \author given.

</root/Imágenes/funcionamientoSPF.png, id=1, 660.96938pt x 477.28313pt>
<use /root/Imágenes/funcionamientoSPF.png> [1{/var/lib/texmf/fonts     /map/pdftex/updmap/pdftex.map}]
! Misplaced \noalign.
\hline ->\noalign 
              {\ifnum 0=`}\fi \hrule \@height \arrayrulewidth\futurelet...
l.63 \hline
? 

Could anyone give me any idea why I'm getting that error? Thank you very much.

I have two files, in the first a list of reports and in the second a list of companies for example.

file1.csv

20170112;compra;articulos papeleria;Papeleria Pepito
20170112;compra;tinta impresoras;Distribuidora de todito
20170214;venta;juego de sala;Perico de los palotes

file2.csv

Papeleria Pepito;/tmp/transacciones/PapeleriaPepito
Distribuidora de todito;/tmp/transacciones/DistribuidoraTodito

What I need is to go through the first file1 and if the text of the fourth column matches the first column of file 2 copy that line to the file specified in column two of the same file (col2. archive2) if there is no match it would be sent to a file in a location /tmp/others

In an application I have a main activity and several fragments, the application works by connecting to two bluetooth devices.

What I need is that before closing THE APPLICATION disconnect and turn off the bluetooth of the mobile. I have tried with the onDestoy() and onPause() methods inside the MainActivity but I don't have the expected results because although the blue turns off the application becomes unstable and exceptions are generated and it cannot exit normally.

Can someone guide me with the method on which I should program. Thank you very much.

@Override
public void onDestroy(){
    super.onDestroy();
    try {
        mBluetoothAdapter.disable();
        mBluetoothGatt.disconnect();
    } catch (Exception ex) {
    }
}

I emphasize the problem is not the lines of code, because if they turn off the bluetooth, but it is the event within which I do it that generates unwanted exceptions.

I have generated an application which runs very well on systems with api levels greater than 20, I wanted to try it with an android s4 mini which has an api level 19 (Kit-Kat) can someone help me to provide compatibility with this system.

I have gone through some tutorials which led me to modify the project structure and modify the compilesdk to version 19. But I have a problem with these two lines of gradle code

compile 'com.android.support:appcompat-v7:23.4.0'
compile 'com.android.support:design:23.4.0'

I tried changing the first dependency to its version 19.4.0, that is:

compile 'com.android.support:appcompat-v7:19.4.0'

and I have no problems but I can't do the same with the second dependency. Can anybody help me. The application works with the navigation drawer component

This is my full gradle file

apply plugin: 'com.android.application'

android {
compileSdkVersion 19
buildToolsVersion "24.0.2"
defaultConfig {
    applicationId "com.example.kevtho.aplicacion"
    minSdkVersion 19
    targetSdkVersion 19
    versionCode 1
    versionName "1.0"
    multiDexEnabled true
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}
productFlavors {
}
}

dependencies {
compile 'com.android.support:appcompat-v7:19.4.0'
compile 'com.android.support:design:23.4.0'
compile('com.android.support:support-v4:23.4.0') {
    exclude group: 'com.android.support', module: 'support-v4'
}
compile 'com.google.android.gms:play-services:9.4.0'
testCompile 'junit:junit:4.12'
compile 'com.android.support:support-v4:23.2.1'
compile files('libs/btsdk.jar')
compile files('libs/gson-2.2.4.jar')
//compile files('libs/android-support-4.0.jar')
}

Hello everyone, I have an application that works with a database, I want to execute a query in the base like the one I leave later, the detail is that this method (query) should only be executed at 7:30 in the morning every days can someone help me with this problem.

In advance thanks for the help

public void borrarRegistros(){
    String consulta="delete from registros"; //borrar todos los registros de la tabla registros
    MainActivity.adapter.openSqliteDataBaseInDevice();
    try {
        Cursor c=MainActivity.adapter.get_sqliteDB().rawQuery(consulta,null);
        c.moveToFirst();
        c.close();
    }catch (Exception ex){
    }
    MainActivity.adapter.closeSqliteDataBaseInDevice();
}

I'm working on a project with Action Bar Tabs in Android. I have managed to create my fragments and achieve the desired interaction, but I have a problem. In one of those fragments I have a button, but clicking it does nothing.

This is in the code I use to call the fragment from the MainActivity:

public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View rootView=null;
        switch (getArguments().getInt(ARG_SECTION_NUMBER)){
            case 1:
                rootView = inflater.inflate(R.layout.fragment_frm_dispositivos, container, false);
                //return rootView;
            break;
            case 2:
                rootView = inflater.inflate(R.layout.fragment_frm_transaccion, container, false);
                //return rootView;
            break;
            case 3:
                rootView = inflater.inflate(R.layout.fragment_frm_cajero, container, false);
                //return rootView;
            break;
        }
        return rootView;
    }
}

and this is what i do in the fragment

public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View view =inflater.inflate(R.layout.fragment_frm_cajero, container, false);
    btnGuardar=(Button)view.findViewById(R.id.btnGuardarCajero);
    btnGuardar.setOnClickListener(this);
    return view;
}
 @Override
public void onClick(View v) {
        Toast.makeText(getContext(),"no sirve",Toast.LENGTH_SHORT).show();

}