我想更改MDLabel的font_name属性。但是我想在.py
文件中而不是在文件中动态添加此组件.kv
。
所以当我写这样的东西:
from kivy.lang import Builder
from kivymd.app import MDApp
from kivymd.uix.label import MDLabel
from kivymd.uix.screen import MDScreen
class MainApp(MDApp):
def build(self):
Builder.load_string(KV)
otherLabel = MDLabel(
text="one more text",
halign="center",
font_name="18328",
font_size="50sp"
)
screen.add_widget(
otherLabel
)
return screen
MainApp().run()
它没有帮助。如何实现动态应用字体?
KV = '''
Screen:
MDCard:
id: box
orientation: "vertical"
padding: "8dp"
size_hint: None, None
size: "280dp", "180dp"
pos_hint: {"center_x": .5, "center_y": .5}
MDLabel:
text: "Hello"
theme_text_color: "Secondary"
size_hint_y: None
height: self.texture_size[1]
font_name: '18328.ttf'
MDSeparator:
height: "1dp"
MDLabel:
text: "Body"
MDLabel:
text: "Hello"
font_name: 'BebasNeue-Regular.otf'
font_size: "50sp"
'''
在屏幕本身中创建一个引用(您也无需使用.ttf,库会自动添加它,只需不带扩展名的文件名即可)
class MyScreen(Screen):
my_MD_Label = None
def on_kv_post(self, instance):
self.my_MD_Label = MDLabel(
text="one more text"
font_name="18328"
)
self.ids.box.add_widget(self.my_MD_Label)
而且,只要您想更改它,就可以做到
self.my_MD_Label.font_name = "new_font" # When in same screen
self.manager.get_screen('MyScreen').my_MD_Label.font_name = "new_font" #When in other screen
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我来说两句