获取kivy中选中复选框的值

Question

test.py

import sqlite3 as lite

from kivy.uix.screenmanager import Screen
from kivy.app import App
from kivy.lang import Builder
from kivy.core.window import Window

Window.size = (600, 325)

class UserGroup(Screen):

    def insert_data(self, arg1,arg2):
        print(arg1)
        print(arg2)


class FactUserGroup(App):

    def build(self):
        self.root = Builder.load_file('test.kv')
        return self.root


if __name__ == '__main__':
    FactUserGroup().run()

test.kv

<CustomLabel@Label>:
    text_size: self.size
    valign: "middle"
    padding_x: 5

<SingleLineTextInput@TextInput>:
    multiline: False

<GreenButton@Button>:
    background_color: 1, 1, 1, 1
    size_hint_y: None
    height: self.parent.height * 0.120

UserGroup

    GridLayout:
        cols: 2
        padding : 30,30
        spacing: 20, 20
        row_default_height: '30dp'

        Label:
            text: 'Male'
            text_size: self.size
            valign: 'middle'

        CheckBox:
            group: 'check'
            id : chk


        Label:
            text: 'Female'
            text_size: self.size
            valign: 'middle'

        CheckBox:
            group: 'check'

        CustomLabel:
            text: 'age'
            text_size: self.size
            valign: 'middle'

        SingleLineTextInput:
            id: age


        GreenButton:
            text: 'Ok'
            on_press: root.insert_data(chk.text,age.text)


        GreenButton:
            text: 'Cancel'
            on_press: app.stop()

如何获取复选框的值？我正在使用 age.text 获取年龄文本框的值，但我不知道复选框的值？
当点击 'Ok' 然后如何获取选中的复选框值并传入 root.insert_data.

Answer 1

您可以通过 active 属性获取复选框的选中状态，因此请尝试更改：

GreenButton:
    text: 'Ok'
    on_press: root.insert_data(chk.active ,age.text)

在此代码段中，chk.text 已更改为 chk.active，这对我来说很合适。

在 https://kivy.org/docs/api-kivy.uix.checkbox.html

查看更多关于 kivy 复选框的参考

希望对您有所帮助。试一试。

更新：

因此，为了能够获取每个复选框的属性和文本输入，您可以将 ObjectProperties 分配给小部件，并且您可以将它们 link 分配给您的 test.py文件。

修改来源：

test.py

from kivy.uix.screenmanager import Screen
from kivy.app import App
from kivy.lang import Builder
from kivy.core.window import Window
from kivy.properties import ObjectProperty

Window.size = (600, 325)

class UserGroup(Screen):
    male = ObjectProperty(None)
    female = ObjectProperty(None)
    age = ObjectProperty(None)
    
    def insert_data(self):
        if self.male.active:
            print('Male')
        elif self.female.active:
            print('Female')
        else:
            print('No gender selected')
        print(self.age.text)


class FactUserGroup(App):

    def build(self):
        self.root = Builder.load_file('test.kv')
        return self.root


if __name__ == '__main__':
    FactUserGroup().run()

在 .py 文件中，您可以找到 ObjectProperty 的新导入。您还可以看到 UserGroup 中定义了三个新属性以与视图进行交互，并且 UserGroup.insert_data 中的修改非常简单。

test.kv

<CustomLabel@Label>:
    text_size: self.size
    valign: "middle"
    padding_x: 5

<SingleLineTextInput@TextInput>:
    multiline: False

<GreenButton@Button>:
    background_color: 1, 1, 1, 1
    size_hint_y: None
    height: self.parent.height * 0.120

UserGroup

    male: chk_male
    female: chk_female
    age: txt_age

    GridLayout:
        cols: 2
        padding : 30,30
        spacing: 20, 20
        row_default_height: '30dp'

        Label:
            text: 'Male'
            text_size: self.size
            valign: 'middle'

        CheckBox:
            group: 'check'
            id : chk_male

        Label:
            text: 'Female'
            text_size: self.size
            valign: 'middle'

        CheckBox:
            group: 'check'
            id: chk_female

        CustomLabel:
            text: 'age'
            text_size: self.size
            valign: 'middle'

        SingleLineTextInput:
            id: txt_age


        GreenButton:
            text: 'Ok'
            on_press: root.insert_data()


        GreenButton:
            text: 'Cancel'
            on_press: app.stop()

在 .kv 文件中，两个复选框的 ID 和文本输入分别重命名为 chk_male、chk_female 和 txt_age。

您还可以看到对象属性 link 定义在 UserGroup 部分的开头。

希望它有意义并符合您的要求。

Answer 2

解决方法是使用StringProperty,添加text (Male, Female) 到 CheckBox，和 on_active 事件来捕获性别。

test.py

from kivy.properties import StringProperty
...
    def insert_data(self, age):
        print("Gender={}".format(self.gender))
        print("Age={}".format(age))

test.kv

        CheckBox:
            group: 'check'
            id : chk
            text: "Male"
            on_active:
                root.gender = self.text
        ...
        CheckBox:
            group: 'check'
            text: "Female"
            on_active:
                root.gender = self.text
        ...
        GreenButton:
            text: 'Ok'
            on_press: root.insert_data(age.text)

例子

test.py

import sqlite3 as lite

from kivy.uix.screenmanager import Screen
from kivy.app import App
from kivy.lang import Builder
from kivy.core.window import Window
from kivy.properties import StringProperty

Window.size = (600, 325)


class UserGroup(Screen):
    gender = StringProperty("")

    def insert_data(self, age):
        print("Gender={}".format(self.gender))
        print("Age={}".format(age))


class FactUserGroup(App):

    def build(self):
        self.root = Builder.load_file('test.kv')
        return self.root


if __name__ == '__main__':
    FactUserGroup().run()

test.kv

#:kivy 1.10.0

<CustomLabel@Label>:
    text_size: self.size
    valign: "middle"
    padding_x: 5

<SingleLineTextInput@TextInput>:
    multiline: False

<GreenButton@Button>:
    background_color: 1, 1, 1, 1
    size_hint_y: None
    height: self.parent.height * 0.120

UserGroup

    GridLayout:
        cols: 2
        padding : 30,30
        spacing: 20, 20
        row_default_height: '30dp'

        Label:
            text: 'Male'
            text_size: self.size
            valign: 'middle'

        CheckBox:
            group: 'check'
            id : chk
            text: "Male"
            on_active:
                root.gender = self.text

        Label:
            text: 'Female'
            text_size: self.size
            valign: 'middle'

        CheckBox:
            group: 'check'
            text: "Female"
            on_active:
                root.gender = self.text

        CustomLabel:
            text: 'age'
            text_size: self.size
            valign: 'middle'

        SingleLineTextInput:
            id: age

        GreenButton:
            text: 'Ok'
            on_press: root.insert_data(age.text)

        GreenButton:
            text: 'Cancel'
            on_press: app.stop()

获取kivy中选中复选框的值

get value of selected checkbox in kivy

python

python-2.7

kivy

kivy-language

test.py

test.kv

更新：

test.py

test.kv

test.py

test.kv

例子

test.py

test.kv

输出