picker

    var layoutPicker = Ti.UI.createView({
        height:251,
        bottom:-251
    });

    var btnCancel = Ti.UI.createButton({
        title:'Cancelar',
        style:Ti.UI.iPhone.SystemButtonStyle.BORDERED
    });

    var btnDone = Ti.UI.createButton({
        title:'Listo',
        style:Ti.UI.iPhone.SystemButtonStyle.DONE
    });

    var btnSpace = Ti.UI.createButton({
        systemButton:Ti.UI.iPhone.SystemButton.FLEXIBLE_SPACE
    })

    var toolBar = Ti.UI.iOS.createToolbar({
        top:0,
        items: [btnCancel, btnSpace, btnDone]
    });

    var picker = Titanium.UI.createPicker({
        top:43
    });
    picker.selectionIndicator=true;
    var pickerValues = [
        Titanium.UI.createPickerRow({title: 'V1'}),
        Titanium.UI.createPickerRow({title: 'V2'}),
        Titanium.UI.createPickerRow({title: 'V3'})
    ];

    picker.add(pickerValues);

    layoutPicker.add(toolBar);
    layoutPicker.add(picker);

    var slideIn = Ti.UI.createAnimation({bottom:0});
    var slideOut = Ti.UI.createAnimation({bottom:-251});
    var slided = false;

    txtField.addEventListener('focus', function(){
        if(slided==false){

        }
        layoutPicker.animate(slideOut);
    });

    btnField.addEventListener('click', function(){
        layoutPicker.animate(slideIn);
        txtField.blur();
    });

    btnCancel.addEventListener('click', function(){
        layoutPicker.animate(slideOut);
    });

    btnDone.addEventListener('click', function(){
        txtField.value=picker.getSelectedRow(0).title;
        layoutPicker.animate(slideOut);
    });
    layout.add(layoutPicker);