Question

我做了我的第一个kivy计划。当我运行这个应用程序时，它会出现空窗口。

这是整个计划。

Python代码：

import java.text.DateFormatSymbols;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

public class GroupList {
    public static void main(String[] args) {
        List<MoveTrack> mveTracking = new ArrayList<>();
        mveTracking.add(new MoveTrack(new Date(), 10.0d));
        mveTracking.add(new MoveTrack(new Date(), 11.0d));
        Map<String, Double> movMap = new HashMap<>();
        movMap = mveTracking.stream().collect(Collectors.groupingBy(m -> {
            final Calendar cal = Calendar.getInstance();
            cal.setTime(m.getTime());
            final int month = cal.get(Calendar.MONTH);
            return new DateFormatSymbols().getMonths()[month];
        }, Collectors.summingDouble(MoveTrack::getMovementAmount)));
        System.out.println(movMap);
    }
}

final class MoveTrack {

    private final Date time;
    private final Double movementAmount;

    public MoveTrack(final Date time, final Double movementAmount) {
        this.time = new Date(time.getTime());
        this.movementAmount = movementAmount;
    }

    public Date getTime() {
        return time;
    }

    public Double getMovementAmount() {
        return movementAmount;
    }
}

Kivy代码#!/usr/bin/env python3 # -*- coding: utf-8 -*- # from kivy.app import App from kivy.uix.boxlayout import BoxLayout from kivy.properties import ObjectProperty, StringProperty class Myfirstwidget(BoxLayout): def text(self, val): print('text input text is: {txt}'.format(txt=val)) class MainAPP(App): def build(self): return Myfirstwidget() if __name__ == '__main__': MainAPP().run()：

myfirstwidget.kv

Answer 1

将kv文件的名称更改为<?php $installer = $this; $installer->startSetup(); // Create the mdg_giftregistry/registry table $tableName = $installer->getTable('mdg_giftregistry/entity'); // Check if the table already exists if ($installer->getConnection()->isTableExists($tableName) != true) { $table = $installer->getConnection()->newTable($tableName)->addColumn('entity_id', Varien_Db_Ddl_Table::TYPE_INTEGER, null, array( 'identity' => true, 'unsigned' => true, 'nullable' => false, 'primary' => true, ), 'Entity Id' ) ->addColumn('customer_id', Varien_Db_Ddl_Table::TYPE_INTEGER, null, array( 'unsigned' => true, 'nullable' => false, 'default' => '0', ), 'Customer Id' ) ->addColumn('type_id', Varien_Db_Ddl_Table::TYPE_SMALLINT, null, array( 'unsigned' => true, 'nullable' => false, 'default' => '0', ), 'Type Id') ->addColumn('website_id', Varien_Db_Ddl_Table::TYPE_SMALLINT, null, array( 'unsigned' => true, 'nullable' => false, 'default' => '0', ), 'Website Id' ) ->addColumn('event_name', Varien_Db_Ddl_Table::TYPE_TEXT, 255, array(), 'Event Name' ) ->addColumn('event_date', Varien_Db_Ddl_Table::TYPE_DATE, null, array(), 'Event Date' )->addColumn('event_country', Varien_Db_Ddl_Table::TYPE_TEXT, 3, array(), 'Event Country' ) ->addColumn('event_location', Varien_Db_Ddl_Table::TYPE_TEXT, 255,array(), 'Event Location' ) ->addColumn('created_at', Varien_Db_Ddl_Table::TYPE_TIMESTAMP, null, array( 'nullable' => false, ), 'Created At') ->addIndex($installer->getIdxName('mdg_giftregistry/entity', array('customer_id')), array('customer_id')) ->addIndex($installer->getIdxName('mdg_giftregistry/entity', array('website_id')), array('website_id')) ->addIndex($installer->getIdxName('mdg_giftregistry/entity', array('type_id')), array('type_id')) ->addForeignKey( $installer->getFkName( 'mdg_giftregistry/entity', 'customer_id', 'customer/entity','entity_id' ), 'customer_id', $installer->getTable('customer/entity'), 'entity_id', Varien_Db_Ddl_Table::ACTION_CASCADE, Varien_Db_Ddl_Table::ACTION_CASCADE) ->addForeignKey( $installer->getFkName( 'mdg_giftregistry/entity', 'website_id', 'core/website', 'website_id' ), 'website_id', $installer->getTable('core/website'), 'website_id', Varien_Db_Ddl_Table::ACTION_CASCADE, Varien_Db_Ddl_Table::ACTION_CASCADE) ->addForeignKey( $installer->getFkName('mdg_giftregistry/entity', 'type_id', 'mdg_giftregistry/type', 'type_id' ), 'type_id', $installer->getTable('mdg_giftregistry/type'), 'type_id', Varien_Db_Ddl_Table::ACTION_CASCADE, Varien_Db_Ddl_Table::ACTION_CASCADE); $installer->getConnection()->createTable($table); } $installer->endSetup();。

它的名称必须类似于App类的名称，但是小写，没有'app'。更多信息docs。

Answer 2

问题出在您的kv文件中。

当你这样做时

Button:
        on_press: self.text(txt_inpt.text)

您正在按钮，而不是MyFirstWidget实例

相反，你必须这样做：

Button:
    on_press:root.text(txt_inpt.text)

那应该有用

python kivy我看不到只是一个空窗口

2 个答案: