kivy scrollview不起作用

我想在EmployeeScreen类中使用kivy scrollview。它不会滚动！？我究竟做错了什么？我希望这不是重复的，请帮助。我去了这个链接Kivy ScrollView - Not Scrolling。这似乎是唯一与kivy scrollview不滚动有关的问题。这并没有解决我的问题。kivy scrollview不起作用

.py文件：

`from kivy.app import App 

from kivy.uix.label import Label 
from kivy.uix.button import Button 
from kivy.uix.screenmanager import ScreenManager, Screen 
from kivy.properties import ObjectProperty 
from kivy.uix.scrollview import ScrollView 


from kivy.uix.boxlayout import BoxLayout 
from kivy.uix.stacklayout import StackLayout 
from kivy.uix.floatlayout import FloatLayout 
from kivy.uix.gridlayout import GridLayout 


class LogInScreen(Screen): 
    pass 
class EmployeeScreen(Screen): 
    pass 

class Manager(ScreenManager): 
    login_screen = ObjectProperty(None) 
    employee_screen = ObjectProperty(None) 


class CptApp(App): 
    icon = 'Images\login\cptlogo.png' 
    title = 'CPT' 
    def build(self): 
     return Manager() 


if __name__=='__main__': 
    CptApp().run()`

.kv文件：

<Manager>: 
id: screen_manager 

login_screen: login_screen 
employee_screen: employee_screen 


LogInScreen: 
    id: login_screen 
    name: 'login' 
    manager: screen_manager 

    FloatLayout: 
     StackLayout: 
      orientation: 'lr-tb' 
      canvas: 
       Color: 
        rgba: 1,1,1,1 
       Rectangle: 
        pos: self.pos 
        size: self.size 
      Image: 
       size_hint_y: .1 
       source: 'Images\login\cptbanner.jpg' 
       allow_stretch: True 
       keep_ratio: True 

      Image: 
       source: 'Images\login\HD7Brw.jpg' 
       allow_stretch: True 
       keep_ratio: False 

    Label: 
     size_hint_y: .05 
     size_hint_x: .5 
     pos_hint: {"x": .25, "y": .7} 
     markup: True 
     text: '[i][b][color=#000000]USER NAME[/color][/b][/i]' 

    TextInput: 
     id: 'username_input' 
     multiline: False 
     size_hint_x: .4 
     size_hint_y: .05 
     pos_hint: {"x": .3, "y": .65} 

    Label: 
     size_hint_y: .05 
     size_hint_x: .5 
     markup: True 
     text: '[i][b][color=#000000]PASSWORD[/color][/b][/i]' 
     pos_hint: {'x': .25, 'y': .5} 

    TextInput: 
     id: 'password_input' 
     multiline: False 
     password: True 
     size_hint_x: .4 
     size_hint_y: .05 
     pos_hint: {'x': .3, 'y': .45} 

    Image: 
     source: 'Images/login/loginbutton.png' 
     size_hint_x: .25 
     size_hint_y: .1 
     pos_hint: {'x': .375, 'y': .25} 

    Button: 
     id: 'login_button' 
     background_color: 0,0,0,0 
     markup: True 
     text: '[i][b][color=#000000]LOGIN[/color][/b][/i]' 
     size_hint_x: .25 
     size_hint_y: .1 
     pos_hint: {'x': .375, 'y': .25} 
     on_release: screen_manager.current = 'employeescreen' 

EmployeeScreen: 
    id: employee_screen 
    name: 'employeescreen' 
    manager: screen_manager 

    StackLayout: 
     orientation: 'lr-tb' 
     canvas: 
      Color: 
       rgba: 1,1,1,1 
      Rectangle: 
       pos: self.pos 
       size: self.size 
     Image: 
      size_hint_y: .1 
      source: 'Images\login\cptbanner.jpg' 
      allow_stretch: True 
      keep_ratio: True 

     ScrollView: 
      do_scroll_x: False 
      size: root.size 
      pos: root.pos 
      GridLayout: 
       cols: 2 
       size_hint_y: None 
       height: self.minimum_height 
       pos: root.pos 

       Button: 
        height: 40 
        size_hint_y: None 
        text: 'TEST' 
       Button: 
        size_hint_x: 1 
        size_hint_y: None 
        text: 'TEST' 
       Button: 
        size_hint_x: 1 
        size_hint_y: None 
        text: 'TEST' 
       Button: 
        size_hint_x: 1 
        size_hint_y: None 
        text: 'TEST' 
       Button: 
        size_hint_x: 1 
        size_hint_y: None 
        text: 'TEST' 
       Button: 
        size_hint_x: 1 
        size_hint_y: None 
        text: 'TEST' 
       Button: 
        size_hint_x: 1 
        size_hint_y: None 
        text: 'TEST' 
       Button: 
        size_hint_x: 1 
        size_hint_y: None 
        text: 'TEST' 
       Button: 
        size_hint_x: 1 
        size_hint_y: None 
        text: 'TEST' 
       Button: 
        size_hint_x: 1 
        size_hint_y: None 
        text: 'TEST' 
       Button: 
        size_hint_x: 1 
        size_hint_y: None 
        text: 'TEST' 
       Button: 
        size_hint_x: 1 
        size_hint_y: None 
        text: 'TEST'

来源

2017-06-17 supreme

您发布的代码存在很多问题。对于初学者来说，你返回多个根部件并且有格式错误。正如所写，这不会运行。清理一下，我会看看。 – Mox

对于格式错误我很抱歉，我第一次在SO上发布代码，代码在这个过程中肯定已经被破坏了。然而我碰巧弄明白了。 – supreme

@ user1880836你是什么意思我要返回多个根部件？我的代码也可以在我的电脑上正常运行。我是初学者，所以请原谅我的白痴，哈哈。 – supreme

，我想在我.kv文件中使用网格布局，错了，我不得不创建一个类并覆盖其init。

class MyLayout(GridLayout): 
def __init__(self,**kwargs): 
    super(MyLayout,self).__init__(**kwargs) 
    self.size_hint_y = (None) 
    self.bind(minimum_height = self.setter('height'))

然后我把类放在GridLayout所在的.kv文件中。

来源

2017-06-18 11:28:57 supreme

kivy scrollview不起作用

回答

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