Question

我使用此方法定位BoxLayout

layout = BoxLayout(size_hint=(1, None), height=50, spacing=100, pos_hint={'y': 0.5 , 'top': 0.5})

然而它居中于中间，我希望它被放置在FloatLayout的顶部中心。

运行时的代码也会发出此警告....

[CRITICAL          ] [Clock       ] Warning, too much iteration done before the next frame. Check your code, or increase the Clock.max_iteration attribute
[CRITICAL          ] [Clock       ] Warning, too much iteration done before the next frame. Check your code, or increase the Clock.max_iteration attribute
[CRITICAL          ] [Clock       ] Warning, too much iteration done before the next frame. Check your code, or increase the Clock.max_iteration attribute
[CRITICAL          ] [Clock       ] Warning, too much iteration done before the next frame. Check your code, or increase the Clock.max_iteration attribute
[CRITICAL          ] [Clock       ] Warning, too much iteration done before the next frame. Check your code, or increase the Clock.max_iteration attribute
[INFO              ] [Base        ] Leaving application in progress...

下面是代码：

import kivy
from kivy.app import App
from kivy.uix.anchorlayout import AnchorLayout
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.gridlayout import GridLayout
from kivy.uix.widget import Widget
from kivy.uix.label import Label
from kivy.uix.video import Video
from kivy.uix.relativelayout import RelativeLayout
from kivy.graphics import *
from kivy.lang import Builder
from kivy.uix.boxlayout import BoxLayout
from random import random
from kivy.properties import ListProperty

kv = '''
<ColoredLabel>:
    size: (100,100)

    background_color:
    canvas.before:
        Color:
            rgba: self.background_color
        Rectangle:
            pos: self.pos
            size: self.size
    '''

Builder.load_string(kv)

class ColoredLabel(Label):
    background_color = ListProperty((0,0,0,1))

class MyApp(App):

    def build(self):
        f = FloatLayout()
        g = GridLayout(cols=5, rows=2, row_force_default=True, row_default_height=80)
        layout = BoxLayout(size_hint=(1, None), height=50, spacing=100, pos_hint={'y': 0.5 , 'top': 0.5})
        v = Video(source='driver.mp4', state='play', options={'eos':'loop'})
        l1 = Label(text="jenkins", font_size=32)
        l2 = Label(text="git", font_size=32)
        f.add_widget(v)

        """
        label1 = ColoredLabel(text="jenkins output", pos_hint={'top': 1, 'right': .1}, size_hint=(None, None) , background_color=(160,160,160,.5))
        f.add_widget(label1)

        label2 = ColoredLabel(text="git output", pos_hint={'top': 1, 'right': .5}, size_hint=(None, None) , background_color=(160,160,160,.5))
        f.add_widget(label2)

        label3 = ColoredLabel(text="dev output", pos_hint={'top': 1, 'right': .8}, size_hint=(None, None) , background_color=(160,160,160,.5))
        f.add_widget(label3)
        """

        text1 = "jenkins"

        label1 = ColoredLabel(text=text1, background_color=(160,160,160,.5))
        layout.add_widget(label1)

        label2 = ColoredLabel(text="git", background_color=(160,160,160,.5))
        layout.add_widget(label2)

        label3 = ColoredLabel(text="portal", background_color=(160,160,160,.5))
        layout.add_widget(label3)

        f.add_widget(layout)


        return f

if __name__ == "__main__":
    MyApp().run()

Answer 1

使用pos_hint={'top': 1}。不要将top与y混在一起，这两者与自己冲突，因为它们都指的是正确的位置，这是你的错误的原因。

from kivy.app import App
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.label import Label
from kivy.lang import Builder
from kivy.uix.boxlayout import BoxLayout
from kivy.properties import ListProperty

kv = '''
<ColoredLabel>:
    size: (100,100)

    background_color:
    canvas.before:
        Color:
            rgba: self.background_color
        Rectangle:
            pos: self.pos
            size: self.size
    '''

Builder.load_string(kv)

class ColoredLabel(Label):
    background_color = ListProperty((0,0,0,1))

class MyApp(App):
    def build(self):
        f = FloatLayout()
        layout = BoxLayout(size_hint=(1, None), height=50, pos_hint={'top': 1})

        label1 = ColoredLabel(text="jenkins", background_color=(160,160,160,.5))
        layout.add_widget(label1)

        label2 = ColoredLabel(text="git", background_color=(160,160,160,.5))
        layout.add_widget(label2)

        label3 = ColoredLabel(text="portal", background_color=(160,160,160,.5))
        layout.add_widget(label3)

        f.add_widget(layout)


        return f

if __name__ == "__main__":
    MyApp().run()

同时检查使用效果：

layout = BoxLayout(size_hint=(0.5, None), height=50, pos_hint={'top': 1})

和

layout = BoxLayout(size_hint=(0.5, None), height=50, pos_hint={'top': 1, 'center_x':0.5})

python kivy boxlayout设定位置

1 个答案: