对奇异鸟来说是新手,只接受过python的高中教育,现在已经坚持了一周。我想要一个可以在StackLayout中添加和删除按钮的系统,我该怎么做?
我可以添加和删除按钮,现在只需要弄清楚如何将它们放置在正确的区域即可。
我知道这个问题有点儿混乱,我对此深有感触,但我认为最好的方法是学习就是直接研究它。
pythton代码:
# import kivy & functions/widgets.
import kivy
from kivy.app import App
from kivy.uix.button import Button
# import kivy layouts.
from kivy.uix.floatlayout import FloatLayout
# Specify version of kivy needed.
kivy.require("1.10.1")
# define buttons and widgets
testButton = Button(width=177, height=254, size_hint=(None, None), background_normal="pics/32864.jpg")
class Page(FloatLayout):
def __init__(self):
super().__init__()
def add_button(self):
Page.add_widget(self, widget=testButton)
class YuGiOhApp(App):
pass
YuGiOhApp().run()
我的.kv代码:
#:kivy 1.10.1
<TestButton@Button>:
width: 177
height: 254
size_hint: None, None
background_normal: "pics/32864.jpg"
FloatLayout:
Button:
size_hint: 0.20, 0.10
pos_hint: {"x": 0.60, "top": 1}
text: "Search"
on_press: root.add_button()
Button:
size_hint: 0.20, 0.10
pos_hint: {"x": 0.80, "top": 1}
text: "collection"
TextInput:
multiline: False
font_size: 48
size_hint: 0.60, 0.10
pos_hint: {"x": 0, "top": 1}
ScrollView:
size_hint: 0.60, 0.90
StackLayout:
orientation: "lr-tb"
pos_hint: {"x": 0, "top": 0.88}
size_hint: 1, None
height: self.minimum_height
padding: 5
spacing: 5
TestButton:
TestButton:
TestButton:
TestButton:
TestButton:
TestButton:
TestButton:
TestButton:
TestButton:
TestButton:
TestButton:
TestButton:
TestButton:
TestButton:
TestButton:
TestButton:
编辑4:尝试在按下标有“搜索”的按钮时尝试运行add_button()函数时,出现错误“ AttributeError:'FloatLayout'对象没有属性'add_button'”
答案 0 :(得分:1)
您可以为StackLayout
小部件赋予唯一的id
。
StackLayout:
id: your_stacklayout_id
...
然后访问您的StackLayout
小部件,您可以在id
小部件内使用其root
。
#: import Factory kivy.factory.Factory
FloatLayout:
...
Button:
text: "Add new Button"
on_press: root.ids["your_stacklayout_id"].add_widget(Factory.TestButton())
...
这是一个基本示例:
main.py
from kivy.app import App
from kivy.uix.boxlayout import *
from kivy.uix.button import *
class Main(BoxLayout):
pass
class TestApp(App):
def build(self):
return Main()
TestApp().run()
test.kv
#: import Factory kivy.factory.Factory
<MyButton@Button>:
text: "Added Button"
<Main>:
BoxLayout:
orientation: "vertical"
Button:
text: "Add New Button"
on_press: root.ids["my_boxlayout_id"].add_widget(Factory.MyButton())
BoxLayout:
id: my_boxlayout_id
orientation: "vertical"
答案 1 :(得分:1)
您的代码有一些问题。
首先,当您似乎确实想引用您的kv
类时,您的FloatLayout
引用了Page
。 (您引用了root.add_button()
,但是该方法在Page
类中。)
第二,您的testbutton
是TestButton
的单个实例,因此,第二次单击Search
按钮时,您会收到有关该按钮已经具有父级的错误。因此,我在python代码中创建了一个TestButton
类,并从<TestButton@Button>
中删除了kv
规则。
这是我想为您的代码提供的内容:
# import kivy & functions/widgets.
import kivy
from kivy.app import App
from kivy.lang import Builder
from kivy.uix.button import Button
# import kivy layouts.
from kivy.uix.floatlayout import FloatLayout
# Specify version of kivy needed.
kivy.require("1.10.1")
# define buttons and widgets
class TestButton(Button):
def __init__(self, **kwargs):
super(TestButton, self).__init__(**kwargs)
self.width = 177
self.height = 254
self.size_hint = (None, None)
self.background_normal = "pics/32864.jpg"
class Page(FloatLayout):
def __init__(self):
super().__init__()
def add_button(self):
self.ids.stack.add_widget(TestButton())
class YuGiOhApp(App):
def build(self):
return Page()
YuGiOhApp().run()
并在id
中为您的StackLayout
添加一个kv
:
#:kivy 1.10.1
<Page>:
Button:
size_hint: 0.20, 0.10
pos_hint: {"x": 0.60, "top": 1}
text: "Search"
on_press: root.add_button()
Button:
size_hint: 0.20, 0.10
pos_hint: {"x": 0.80, "top": 1}
text: "collection"
TextInput:
multiline: False
font_size: 48
size_hint: 0.60, 0.10
pos_hint: {"x": 0, "top": 1}
ScrollView:
size_hint: 0.60, 0.90
StackLayout:
id: stack
orientation: "lr-tb"
pos_hint: {"x": 0, "top": 0.88}
size_hint: 1, None
height: self.minimum_height
padding: 5
spacing: 5
TestButton:
TestButton:
TestButton:
TestButton:
TestButton:
TestButton:
TestButton:
TestButton:
TestButton:
TestButton:
TestButton:
TestButton:
TestButton:
TestButton:
TestButton:
TestButton:
新的add_button()
方法引用新的stack
ID来访问StackLayout
,并在每次调用时创建一个新的TestButton
。