可以使用按钮在Kivy中向屏幕添加另一个标签吗

分类：编程问答

如何解决可以使用按钮在Kivy中向屏幕添加另一个标签吗

我希望弹出窗口中的最后一个按钮向上一个屏幕添加标签，并在弹出窗口的文本输入中输入任何内容，但我找不到办法了，这有可能吗？ / p>

我希望ID为id的按钮每次单击时都添加一个标签以显示列表，并且该标签的文本应为在ids带有lab，club和blub的文本输入中输入的任何值

如果可能的话，我该怎么做，任何帮助将不胜感激。

Python：

from kivy.app import App
from kivy.uix.widget import Widget
from kivy.uix.floatlayout import FloatLayout
from kivy.properties import ObjectProperty
from kivy.uix.screenmanager import Screen,ScreenManager
from kivy.uix.textinput import TextInput
from kivy.uix.label import Label
from kivy.uix.button import Button
from kivy.lang import Builder
from kivy.uix.popup import Popup
import time
from kivy.properties import StringProperty

class Enter_Name(Screen):
    input_1 = StringProperty()
    def line(self):
        App.get_running_app().root.get_screen('list').lab_text = self.airline.text    
    pass

class Pop(Screen):
    air_craft = StringProperty()
    def lad(self):
        plane = App.get_running_app().root.get_screen('pop').lab_text = self.airplane.text
        self.plane = plane
    
    
    
class List(Screen):
    Enter_Name.line
    def add(self):
        show_popup()

def show_popup():
    show = Pop()

    pop_up_window = Popup(title="Add Route",content=show,size_hint=(None,None),size=(400,400))
    pop_up_window.open()



class WindowManager(ScreenManager):
    pass

kv = Builder.load_file("pot.kv")

class am4(App):
    def build(self):
        return kv



if __name__ == "__main__":
    am4().run()

基维：

#:kivy 1.0


WindowManager:
    Enter_Name
    List
    Pop
#_______________________________________________________________________________________________________
#LOGIN
#_______________________________________________________________________________________________________
<Enter_Name>
    airline: input_1
    name: 'enter_name'
    id: enter_nom
    FloatLayout:
        cols: 3
        size: root.size
        Label:
            text: "Name of Airline?"
            size_hint: 1,0.3
            pos_hint: {"x": 0,"top":1}

        TextInput:
            multiline: False
            name: 'input_one'
            id: input_1
            size_hint: 0.6,0.06
            pos_hint: {"x": 0.20,"top":0.6}
        Button:
            size_hint: 0.2,0.1
            pos_hint: {"x": 0.4,"top":0.4}
            text: "Enter"
            on_release: 
                app.root.current = 'list'
                root.line()
#_______________________________________________________________________________________________________
#MAIN
#_______________________________________________________________________________________________________
<List>
    lab_text: ''
    name: 'list'
    FloatLayout:
        
        Label:
            text: root.lab_text
            size_hint: 1,0.3
            pos_hint: {"x": -0.38,"top":1.1}
            font_size: 50

        Label:
            text: '--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------'
            size_hint: 1,"top":1}
            font_size: 50

        Button:
            text: "Add Route"
            size_hint: 0.2,0.1
            pos_hint: {"x":0.79,"top":0.99}
            on_release: root.add()


<Pop>
    name: "pop"
    airplane: air_craft
    FloatLayout:
        Label:
            id: lab
            text: "Aircraft"
            pos_hint: {"x": -0.38,"top":1.45}
        Label:
            id: club
            text: "Departure"
            pos_hint: {"x": 0,"top":1.45}
        Label:
            id: blub
            text: "Arrival"
            pos_hint: {"x": 0.38,"top":1.45}

        TextInput:
            multiline: False
            name: 'aircraft'
            id: air_craft
            size_hint: 0.23,0.06
            pos_hint: {"x": 0,"top":0.9}

        TextInput:
            multiline: False
            name: 'departure'
            id: leaving
            size_hint: 0.23,0.06
            pos_hint: {"x": 0.38,"top":0.9}

        TextInput:
            multiline: False
            name: 'arrival'
            id: arriving
            size_hint: 0.23,0.06
            pos_hint: {"x": 0.76,"top":0.9}
        Button:
            size_hint: 0.2,"top":0.5}
            id: add
            text: "Add"
            on_release:
                root.lad()

解决方法

这是您的代码的修改版本，可以满足我的要求：

from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.relativelayout import RelativeLayout
from kivy.properties import ObjectProperty
from kivy.uix.screenmanager import Screen,ScreenManager
from kivy.lang import Builder
from kivy.uix.popup import Popup
from kivy.properties import StringProperty


class Enter_Name(Screen):
    input_1 = StringProperty()

    def line(self):
        App.get_running_app().root.get_screen('list').lab_text = self.airline.text

class ListRow(BoxLayout):
    ac = StringProperty('')
    arr = StringProperty('')
    lv = StringProperty('')


class Pop(RelativeLayout):
    def lad(self,ac,arr,lv):
        list_scr = App.get_running_app().root.get_screen('list')
        if ac != '' or arr != '' or lv != '':
            box_layout = list_scr.ids.box_layout
            box_layout.add_widget(ListRow(ac=ac,arr=arr,lv=lv))
        list_scr.pop.dismiss()


class List(Screen):
    Enter_Name.line
    pop = ObjectProperty(None)

    def add(self):
        self.pop = show_popup()


def show_popup():
    show = Pop()

    pop_up_window = Popup(title="Add Route",content=show,size_hint=(None,None),size=(400,400))
    pop_up_window.open()
    return pop_up_window


class WindowManager(ScreenManager):
    pass


# kv = Builder.load_file("pot.kv")
kv = Builder.load_string('''
#:kivy 1.0


WindowManager:
    Enter_Name
    List
#_______________________________________________________________________________________________________
#LOGIN
#_______________________________________________________________________________________________________
<Enter_Name>
    airline: input_1
    name: 'enter_name'
    id: enter_nom
    FloatLayout:
        cols: 3
        size: root.size
        Label:
            text: "Name of Airline?"
            size_hint: 1,0.3
            pos_hint: {"x": 0,"top":1}

        TextInput:
            multiline: False
            name: 'input_one'
            id: input_1
            size_hint: 0.6,0.06
            pos_hint: {"x": 0.20,"top":0.6}
        Button:
            size_hint: 0.2,0.1
            pos_hint: {"x": 0.4,"top":0.4}
            text: "Enter"
            on_release: 
                app.root.current = 'list'
                root.line()
#_______________________________________________________________________________________________________
#MAIN
#_______________________________________________________________________________________________________
<List>
    lab_text: ''
    name: 'list'
    BoxLayout:
        id: box_layout
        orientation: 'vertical'
        size_hint_y: None
        height: self.minimum_height
        pos_hint: {'top':1}
        
        BoxLayout:
            orientation: 'vertical'
            size_hint: 1,None
            height: 50
            BoxLayout:
                orientation: 'horizontal'
            
                Label:
                    id: lab1
                    text: root.lab_text
                    size_hint_x: 1
                    #pos_hint: {"x": -0.38,"top":1}
                    font_size: 50
        
                Button:
                    text: "Add Route"
                    size_hint_x: 0.5
                    #pos_hint: {"x":0.79,"top":1}
                    on_release: root.add()
    
            Label:
                text: '--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------'
                size_hint: 1,0.3
                #pos_hint: {"x": -0.38,"top":0.99}
                font_size: 50
<ListRow>:
    orientation: 'horizontal'
    size_hint: (1,None)
    height: self.minimum_height
    Label:
        text: 'Aircraft: ' + root.ac
        halign: 'left'
        size_hint: 1,None
        height: self.texture_size[1]
    Label:
        text: 'Leave: ' + root.lv
        halign: 'left'
        size_hint: 1,None
        height: self.texture_size[1]
    Label:
        text: 'Arrive: ' + root.arr
        halign: 'left'
        size_hint: 1,None
        height: self.texture_size[1]


<Pop>
    airplane: air_craft
    FloatLayout:
        Label:
            id: lab
            text: "Aircraft"
            pos_hint: {"x": -0.38,"top":1.45}
        Label:
            id: club
            text: "Departure"
            pos_hint: {"x": 0,"top":1.45}
        Label:
            id: blub
            text: "Arrival"
            pos_hint: {"x": 0.38,"top":1.45}

        TextInput:
            multiline: False
            name: 'aircraft'
            id: air_craft
            size_hint: 0.23,0.06
            pos_hint: {"x": 0,"top":0.9}

        TextInput:
            multiline: False
            name: 'departure'
            id: leaving
            size_hint: 0.23,0.06
            pos_hint: {"x": 0.38,"top":0.9}

        TextInput:
            multiline: False
            name: 'arrival'
            id: arriving
            size_hint: 0.23,0.06
            pos_hint: {"x": 0.76,"top":0.9}
        Button:
            size_hint: 0.2,"top":0.5}
            id: add
            text: "Add"
            on_release:
                root.lad(air_craft.text,arriving.text,leaving.text)
''')


class am4(App):
    def build(self):
        return kv


if __name__ == "__main__":
    am4().run()

我进行的一些重大更改：

  • 将Pop类重新定义为扩展RelativeLayout而不是Screen，并从Pop的子级中删除WindowManager。
  • 定义了一个ListRow类，该类在调用List方法时被添加到Screen lad()中。
  • 在lad()方法中添加了参数以添加信息，并添加了dismiss()调用以关闭Popup。
  • show_pop()方法现在返回创建的Popup实例，该实例保存在List Screen中以供dismiss()使用。
  • 使用垂直的List重新设计了Screen BoxLayout，以简化添加ListRows的过程。

在上面的代码中使用kv加载了Builder.load_string()，但这只是为了我自己的方便。

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