Kivy Python - 以前创建的布局不会显示在滚动视图和页面布局中

Question

这段代码returns我黑屏了，我做错了什么？

python 文件:

from kivy.app import App
from kivy.metrics import dp
from kivy.uix.button import Button
from kivy.uix.label import Label
from kivy.uix.widget import Widget
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.anchorlayout import AnchorLayout
from kivy.uix.gridlayout import GridLayout
from kivy.uix.stacklayout import StackLayout
from kivy.uix.scrollview import ScrollView
from kivy.uix.pagelayout import PageLayout

class myPageLayout(PageLayout):
    pass
class myScrollView(ScrollView):
    pass
class myStackLayout(StackLayout):
    def __init__(self, **kwargs):
        super().__init__(**kwargs)
        for i in range(1,101):
            size=dp(100)
            b= Button(text=str(i),size_hint=(None,None),size=(size,size))
            self.add_widget(b)
class myGridLayout(GridLayout):
    pass
class myAnchorLayout(AnchorLayout):
    pass
class myBoxLayout(BoxLayout):
    pass
class myWidget(Widget):
    pass
class gameApp(App):
    pass


gameApp().run()

kivy 文件：

myPageLayout:

<myBoxLayout>:
    orientation: "horizontal"
    spacing: "10dp"
    Button:
        text: "ciao"
        size_hint: 1,.5
        size: "10dp","10dp"        
        pos_hint: { "y": .5 }

    BoxLayout:
        orientation: "vertical"
        spacing: "10dp"
        Button:
            text: "b1"
        Button:
            text: "b2"
        Button:
            text: "b3"
        
    Button:
        text: "hi2"

<myWidget>:
    Button:
        text: "hi"
        size: "100dp","20dp"
        pos: 300, 100
<myAnchorLayout>:
    #anchor_x: "right"
    anchor_y: "bottom"
    BoxLayout:
        size_hint: .1,.1
        Button:
            text: "hi"
        Button:
            text: "hi2"
<myGridLayout>:
    cols: 3
    rows: 3
    Button:
        text:"hi"
        size_hint:.5,1
    Button:
        text:"hi"
    Button:
        text:"hi"
    myAnchorLayout:
        size_hint:.5,1
    Button:
        text:"hi"
    myBoxLayout:
    Button:
        text:"hi"
        size_hint:.5,1
    myWidget:
    Button:
        text:"hi"
<myStackLayout>:
    #orientation:"tb-lr"
    #padding:("20dp","20dp","20dp","20dp")
    #spacing: "10dp","10dp"
    

<myScrollView>:
    myStackLayout:
        size_hint:1,None
        height: self.minimum_height


<myPageLayout>:
    myBoxLayout:
    myAnchorLayout:
    myWidget:
    myGridLayout:

单独布局工作，即使像“myAnchorLayout”和“myGridLayouts”那样嵌入也是如此。

我也试过用这种方式在“myScrollView”中创建一个新的 StackLayout：

<myScrollView>:
    StackLayout:
        size_hint:1,None
        height: self.minimum_height
        Button:
            text:"hi"
            size_hint:.7,None
            height:"500dp"
        Button:
            text:"hi"
            size_hint:.7,None
            height:"500dp"

它工作了，但现在它不再工作了，这也与“myPageLayout”一起出现。

Answer 1

问题在于 kv 语言坚持 class 名称以大写字母开头。 documentation 表示：

Keep class names capitalized to avoid syntax errors

我认为如果您更改所有 class 名称以满足该要求，您的代码将有效。

.

Kivy Python - 以前创建的布局不会显示在滚动视图和页面布局中

Kivy Python - previously created layouts aren't displayed in scroll view and in page layout

python

python-3.x

kivy

kivy-language