标签的最后几行未显示。我希望使用ScrollView小部件在屏幕上正确显示标签，但我尝试这样做，但ScrollView不能正常工作，除非行数更多，但是随着行数的增加，当我再次滚动时，最后几行不能正确显示。简而言之，我想随着文本长度的增加，滚动视图可以正确显示标签的每一行，并且段落之间的间隔也不会显示
这是我的.kv文件代码
ScreenManager:
id: screen_manager
MainScreen:
name: 'main'
NavigationLayout:
ScreenManager:
Screen:
MDToolbar:
title: "Story"
anchor_title: 'left'
pos_hint: {"top": 1}
elevation: 10
left_action_items: [['menu', lambda x: nav_drawer.set_state()]]
MDNavigationDrawer:
title: 'Story A Day'
id: nav_drawer
swipe_distance: 10
ContentNavigationDrawer:
id: content_drawer
screen_manager: screen_manager
nav_drawer: nav_drawer
<MainScreen>:
BoxLayout:
canvas:
Color:
rgb: 0, 0, 0, 0
Rectangle:
pos: root.pos
size: root.size
ScrollView:
Label:
text:
"""
A boy and a girl were playing together. The boy
had a collection of marbles. The girl has some
sweets with her. The boy told the girl that he
would give her all his marbles in exchange for the
sweets with her. The girl agreed.
The boy kept the most beautiful and the biggest
marbles with him and gave her the remaining marbles.
The girl gave him all her sweets as she promised.
That night the girl slept peacefully. But the boy
could not sleep as he kept wondering if the girl
has hidden some sweets from him the way he had
hidden the best marbles from her.
Moral of the Story :
If you do not give 100 percent in a relationship,
you will always kept doubting if the other person
has given her / his hundred percent. This is applicable
for any relationship like love, employee –
employer, friendship, family, countries, etc
and the most of the feelings we get now
days are just merely just the impact of the
surrounding now days we dont have a good
feeling that last long
and now we have to just name it in that way
"""
font_size: '20sp'
height: self.texture_size[1]
size: self.texture_size
text_size: root.width, None
size_hint_x: 1.0
size_hint_y: None
halign: "auto"
valign: "middle"
答案 0 :(得分：1)
#:import FadeTransition kivy.uix.screenmanager.FadeTransition
ScreenManager:
id: screens
FirstScreen:
AboutUs:
MDIconButton:
icon: 'close'
theme_text_color: "Custom"
text_color: app.theme_cls.primary_color
pos_hint: {"center_y": 0.97}
text_color: 1, 1, 1, 1
on_release:
screens.transition.direction = 'right'
screens.current = "main"
<ContentNavigationDrawer>:
background_color: 2, 3, 4, 5
orientation: "vertical"
padding: "8dp"
spacing: "8dp"
AnchorLayout:
anchor_x: "right"
size_hint_y: None
height: avatar.height
Image:
id: avatar
size_hint: None, None
size: "56dp", "56dp"
source: "data/logo/kivy-icon-256.png"
MDLabel:
anchor_y: 'left'
text: "[b]Story A Day[/b]"
theme_text_color: "Custom"
text_color: 0, 0, 0, 1
markup: True
font_style: "H4"
size_hint_y: None
height: self.texture_size[1]
MDLabel:
text: 'Story A Day'
font_style: "Button"
size_hint_y: None
height: self.texture_size[1]
ScrollView:
MDList:
MDExpansionPanelTwoLine:
text: 'send us your idea'
secondary_text: 'email: xxxxx@gmail.com'
IconLeftWidget:
icon: "email"
TwoLineAvatarListItem:
text: 'Send us your story'
secondary_text: 'to: Story_A_Day@gmail.com'
IconLeftWidget:
icon: "email"
OneLineAvatarListItem:
text: "About Us"
on_release:
root.nav_drawer.set_state("close")
root.screens.transition.direction = 'right'
root.screens.current = "main"
IconLeftWidget:
icon: "information"
on_release:
root.nav_drawer.set_state("close")
screens.transition = FadeTransition(duration=0.5)
screens.current = "screen1"
<AboutUs>:
name: 'screen1'
canvas:
Color:
rgba: 0, 0, 0, 1
Rectangle:
pos: self.pos
size: self.size
Label:
text_color: 255, 255, 255, 0
text: """[b]About Us [/b]"""
markup: True
font_size: '40sp'
text_size: None, None
size_hint: 1, 1.9
height: self.texture_size[1]
Label:
text_color: 255, 255, 255, 0
font_size: '18sp'
text_size: self.width, None
size_hint: 1, 1.5
height: self.texture_size[1]
halign: "center"
valign: "center"
text:
""""""
<Share>
MDFloatingActionButtonSpeedDial:
data: root.data
icon: 'share-variant'
opening_time: 0.5
callback: root.callback # on pressing the call stack buttons
color_icon_root_button: 0, 0, 0, 1 # color of icon of button
color_icon_stack_button: 0, 0, 0, 1
hint_animation: True
rotation_root_button: False
<FirstScreen>:
name: 'main'
NavigationLayout:
id: nav_layout
ScreenManager:
Screen:
MDToolbar:
id: toolbar
title: "Story"
anchor_title: 'left'
pos_hint: {"top": 1}
elevation: 10
left_action_items: [['menu', lambda x: nav_drawer.set_state()]]
BoxLayout:
size_hint: 1, None
height: root.height - toolbar.height
canvas:
Color:
rgba: 0, 0, 0, 1
Rectangle:
pos: self.pos
size: self.size
ScrollView:
Label:
text:
"""
A boy and a girl were playing together. The boy
had a collection of marbles. The girl has some
sweets with her. The boy told the girl that he
would give her all his marbles in exchange for the
sweets with her. The girl agreed.
The boy kept the most beautiful and the biggest
marbles with him and gave her the remaining marbles.
The girl gave him all her sweets as she promised.
That night the girl slept peacefully. But the boy
could not sleep as he kept wondering if the girl
has hidden some sweets from him the way he had
hidden the best marbles from her.
Moral of the Story :
If you do not give 100 percent in a relationship,
you will always kept doubting if the other person
has given her / his hundred percent. This is applicable
for any relationship like love, employee –
employer, friendship, family, countries, etc
and the most of the feelings we get now
days are just merely just the impact of the
surrounding now days we dont have a good
feeling that last long
and now we have to just name it in that way
If you do not give 100 percent in a relationship,
you will always kept doubting if the other person
has given her / his hundred percent. This is applicable
for any relationship like love, employee –
employer, friendship, family, countries, etc
and the most of the feelings we get now
days are just merely just the impact of the
surrounding now days we dont have a good
feeling that last long
and now we have to just name it in that way
If you do not give 100 percent in a relationship,
you will always kept doubting if the other person
has given her / his hundred percent. This is applicable
for any relationship like love, employee –
employer, friendship, family, countries, etc
and the most of the feelings we get now
days are just merely just the impact of the
surrounding now days we dont have a good
feeling that last long
and now we have to just name it in that way
"""
font_size: '20sp'
text_color: 255,255,255, 0
height: self.texture_size[1]
size: self.texture_size
text_size: root.width, None
size_hint_x: 1.0
size_hint_y: None
halign: "auto"
valign: "middle"
MDNavigationDrawer:
title: 'Story A Day'
id: nav_drawer
swipe_distance: 10
ContentNavigationDrawer:
id: content_drawer
screens: app.root
nav_drawer: nav_drawer
答案 1 :(得分：0)
我正在猜测您实际上想要BoxLayout的位置，但是我将按照以下方式操作：
ScreenManager:
id: screen_manager
MainScreen:
<MainScreen>:
name: 'main'
NavigationLayout:
id: nav_layout
ScreenManager:
Screen:
MDToolbar:
id: toolbar
title: "Story"
anchor_title: 'left'
pos_hint: {"top": 1}
elevation: 10
left_action_items: [['menu', lambda x: nav_drawer.set_state()]]
BoxLayout:
size_hint: 1, None
height: root.height - toolbar.height
ScrollView:
Label:
text:
"""
A boy and a girl were playing together. The boy
had a collection of marbles. The girl has some
sweets with her. The boy told the girl that he
would give her all his marbles in exchange for the
sweets with her. The girl agreed.
The boy kept the most beautiful and the biggest
marbles with him and gave her the remaining marbles.
The girl gave him all her sweets as she promised.
That night the girl slept peacefully. But the boy
could not sleep as he kept wondering if the girl
has hidden some sweets from him the way he had
hidden the best marbles from her.
Moral of the Story :
If you do not give 100 percent in a relationship,
you will always kept doubting if the other person
has given her / his hundred percent. This is applicable
for any relationship like love, employee –
employer, friendship, family, countries, etc
and the most of the feelings we get now
days are just merely just the impact of the
surrounding now days we dont have a good
feeling that last long
and now we have to just name it in that way
"""
font_size: '20sp'
color: 0,0,0,1
height: self.texture_size[1]
size: self.texture_size
text_size: root.width, None
size_hint_x: 1.0
size_hint_y: None
halign: "auto"
valign: "middle"
MDNavigationDrawer:
title: 'Story A Day'
id: nav_drawer
swipe_distance: 10
ContentNavigationDrawer:
id: content_drawer
screen_manager: app.root
nav_drawer: nav_drawer
答案 2 :(得分：0)
这是您的kv文件，其中包含ScreenManager:条规则，仅列出了子Screens：
#:import FadeTransition kivy.uix.screenmanager.FadeTransition
ScreenManager:
id: screens
FirstScreen:
AboutUs:
<ContentNavigationDrawer>:
background_color: 2, 3, 4, 5
orientation: "vertical"
padding: "8dp"
spacing: "8dp"
AnchorLayout:
anchor_x: "right"
size_hint_y: None
height: avatar.height
Image:
id: avatar
size_hint: None, None
size: "56dp", "56dp"
source: "data/logo/kivy-icon-256.png"
MDLabel:
anchor_y: 'left'
text: "[b]Story A Day[/b]"
theme_text_color: "Custom"
text_color: 0, 0, 0, 1
markup: True
font_style: "H4"
size_hint_y: None
height: self.texture_size[1]
MDLabel:
text: 'Story A Day'
font_style: "Button"
size_hint_y: None
height: self.texture_size[1]
ScrollView:
MDList:
MDExpansionPanelTwoLine:
text: 'send us your idea'
secondary_text: 'email: xxxxx@gmail.com'
IconLeftWidget:
icon: "email"
TwoLineAvatarListItem:
text: 'Send us your story'
secondary_text: 'to: Story_A_Day@gmail.com'
IconLeftWidget:
icon: "email"
OneLineAvatarListItem:
text: "About Us"
on_release:
root.nav_drawer.set_state("close")
app.root.transition.direction = 'right'
app.root.current = "screen1"
IconLeftWidget:
icon: "information"
on_release:
root.nav_drawer.set_state("close")
app.root.transition = FadeTransition(duration=0.5)
app.root.current = "screen1"
<AboutUs>:
name: 'screen1'
canvas:
Color:
rgba: 0, 0, 0, 1
Rectangle:
pos: self.pos
size: self.size
MDIconButton:
icon: 'close'
theme_text_color: "Custom"
text_color: app.theme_cls.primary_color
pos_hint: {"center_y": 0.97}
text_color: 1, 1, 1, 1
on_release:
app.root.transition.direction = 'right'
app.root.current = "main"
Label:
text_color: 255, 255, 255, 0
text: """[b]About Us [/b]"""
markup: True
font_size: '40sp'
text_size: None, None
size_hint: 1, None
height: self.texture_size[1]
pos_hint: {'top':1}
Label:
text_color: 255, 255, 255, 0
font_size: '18sp'
text_size: self.width, 100
size_hint: 1, None
height: self.texture_size[1]
halign: "center"
valign: "center"
text:
""""""
<Share>
MDFloatingActionButtonSpeedDial:
data: root.data
icon: 'share-variant'
opening_time: 0.5
callback: root.callback # on pressing the call stack buttons
color_icon_root_button: 0, 0, 0, 1 # color of icon of button
color_icon_stack_button: 0, 0, 0, 1
hint_animation: True
rotation_root_button: False
<FirstScreen>:
name: 'main'
NavigationLayout:
id: nav_layout
ScreenManager:
Screen:
MDToolbar:
id: toolbar
title: "Story"
anchor_title: 'left'
pos_hint: {"top": 1}
elevation: 10
left_action_items: [['menu', lambda x: nav_drawer.set_state()]]
BoxLayout:
size_hint: 1, None
height: root.height - toolbar.height
canvas:
Color:
rgba: 0, 0, 0, 1
Rectangle:
pos: self.pos
size: self.size
ScrollView:
Label:
text:
"""
A boy and a girl were playing together. The boy
had a collection of marbles. The girl has some
sweets with her. The boy told the girl that he
would give her all his marbles in exchange for the
sweets with her. The girl agreed.
The boy kept the most beautiful and the biggest
marbles with him and gave her the remaining marbles.
The girl gave him all her sweets as she promised.
That night the girl slept peacefully. But the boy
could not sleep as he kept wondering if the girl
has hidden some sweets from him the way he had
hidden the best marbles from her.
Moral of the Story :
If you do not give 100 percent in a relationship,
you will always kept doubting if the other person
has given her / his hundred percent. This is applicable
for any relationship like love, employee –
employer, friendship, family, countries, etc
and the most of the feelings we get now
days are just merely just the impact of the
surrounding now days we dont have a good
feeling that last long
and now we have to just name it in that way
If you do not give 100 percent in a relationship,
you will always kept doubting if the other person
has given her / his hundred percent. This is applicable
for any relationship like love, employee –
employer, friendship, family, countries, etc
and the most of the feelings we get now
days are just merely just the impact of the
surrounding now days we dont have a good
feeling that last long
and now we have to just name it in that way
If you do not give 100 percent in a relationship,
you will always kept doubting if the other person
has given her / his hundred percent. This is applicable
for any relationship like love, employee –
employer, friendship, family, countries, etc
and the most of the feelings we get now
days are just merely just the impact of the
surrounding now days we dont have a good
feeling that last long
and now we have to just name it in that way
"""
font_size: '20sp'
text_color: 255,255,255, 0
height: self.texture_size[1]
size: self.texture_size
text_size: root.width, None
size_hint_x: 1.0
size_hint_y: None
halign: "auto"
valign: "middle"
MDNavigationDrawer:
title: 'Story A Day'
id: nav_drawer
swipe_distance: 10
ContentNavigationDrawer:
id: content_drawer
screen_manager: app.root
nav_drawer: nav_drawer
我注意到您对AboutUs做的是相同的事情，因此我也进行了修改，以使其所有布局现在都位于<AboutUs>:规则中。由于您的ScreenManager现在与Screens处于不同的规则中，因此您无法使用其id来访问它（ids仅在同一规则内有效）。因此，可以使用Screen进行app.root.current的更改。
我认为screen_manager: app.root不起作用，因为在计算该表达式时app尚不可用。