Kivy ScrollView - 不滚动

2022-01-15 00:00:00 python kivy

问题描述

看起来是人们对 Kivy 的常见问题.我已经在 SO 上检查了其他问题是否存在同样的问题，但没有运气.

Looks like a common problem people have with Kivy. I've already checked other questions for the same problem here on SO but no luck.

我有一个容器BoxLayout:

class Cnt(BoxLayout):
    pass

在 .kv 文件中，我有这样的内容:

In the .kv file I've got something like this:

<Cnt>:
    orientation: 'vertical'
    ScrollView:
        size_hint: (1, .9)
        StackLayout:
            padding: 5
            size_hint_y: None
            id: content_layout
            minimum_height: self.height
            ARow:
            ARow:
            ARow:
            ARow:
            ARow:
            ARow:
            ARow:
            ARow:
            ARow:
            ARow:
            ARow:
            ARow:
            ARow:
            ARow:
            ARow:
    BoxLayout:
        size_hint: (1, .1)
        Label:
            text: 'A'

ARow 是一个带有 CheckBox 和 Label 的 BoxLayout.它有:

ARow is a BoxLayout with a CheckBox and a Label. It has:

size_hint: (1, None)
height: 40

据我了解，这是仅有的两件重要的事情可以对滚动产生影响.

As far as I understand these are the only two important things that could do something to the scrolling.

minimum_height: self.height 与我在 Python 代码中绑定 StackLayout 的 minimum_height 和 height 相同，如果我理解正确的话.

minimum_height: self.height is the same as if I would bind the minimum_height and height of the StackLayout in Python code if I understood it right.

解决方案

改变

minimum_height: self.height

到

height: self.minimum_height

minimum_height 是根据所有孩子的需要计算的.您希望实际高度等于最小高度，即使它大于父级的高度(对于滚动，这正是您想要的).

The minimum_height is what's calculated as needed for all the children. You want the actual height to be equal to the minimum height, even if it's larger than the parent's height (for scrolling, this is exactly what you want).

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