Kivy 和 KivyMD 的 Pyinstaller 构建

Question

我在构建 exe 文件时遇到问题，其中 MDFloatButton 禁用在构建 exe 之后不起作用，但在构建之前可以正常工作。

for btn in self.ids.values():  # Loop through all widgets in self.ids
    if isinstance(btn, MDFloatingActionButton) and btn != button_instance:
        btn.disabled = True

这是单击后禁用按钮的代码片段，但是当我构建时，此功能不起作用，单击后它不会禁用按钮。

我正在使用：

• Python 3.9.0
• KivyMD 1.0.1
• Py安装程序6.0.0

block_cipher = None
from kivy_deps import sdl2, glew
from kivymd import hooks_path as kivymd_hooks_path

a = Analysis(
    ['Main.py'],
    pathex=[],
    binaries=[],
    datas=[('login.kv', '.')],
    hiddenimports=['kivymd.icon_definitions.icon_definitions', 'kivymd.uix.button', 'kivy.properties'],
    hookspath=[kivymd_hooks_path],
    hooksconfig={},
    runtime_hooks=[],
    excludes=[],
    cipher=block_cipher,
    noarchive=False,
    optimize=0,
)
pyz = PYZ(a.pure, a.zipped_data,
             cipher=block_cipher)

exe = EXE(
    pyz,
    a.scripts,
    a.binaries,
    a.zipfiles,
    a.datas,
    *[Tree(p) for p in (sdl2.dep_bins + glew.dep_bins)],
    name='Main',
    debug=False,
    bootloader_ignore_signals=False,
    strip=False,
    upx=True,
    upx_exclude=[],
    runtime_tmpdir=None,
    console=True,
    disable_windowed_traceback=False,
    argv_emulation=False,
    target_arch=None,
    codesign_identity=None,
    entitlements_file=None,   
)

Answer 1

原因是因为类是一个按钮，代码中：

for btn in self.ids.values():  # Loop through all widgets in self.ids
    if isinstance(btn, MDFloatingActionButton) and btn != button_instance:
        btn.disabled = True

名称 btn 正在获取小部件的 id，然后分配 disabled=True 值，但是此时，在 kivymd 生命周期中，按钮正在接收 kivymd GUI 之外的值，以确保按钮小部件可以接受这个值并在 GUI 中表示它，你可以这样做：

在应用程序中定义一个函数：

def enable_disable_the_button(self,tell_me_the_widget,field1,field2):
    the_button_is=tell_me_the_widget #this one comes from the GUI, gets stored here, meaning this variable is connected to the GUI, if I apply a change in its attributes it should work:
    #I want this button to:
    if len(field1.text)>0 and len(field2.text)>0:
        the_button_is.disabled=False
        return 0
    if len(field1.text)==0 or len(field2.text)==0:
        the_button_is.disabled=True
        return 0

稍后您可以使用它或从 Kivy Lang 实现它：

Screen:
    ScreenManager:
        id: MainActivity

        Screen:
            id: SecondActivity
            name: "main"
            MDCard:
                size_hint: None, None
                size: 300, 400
                pos_hint: {"center_x": 0.5, "center_y": 0.5}
                elevation: 10
                padding: 25
                spacing: 25
                orientation: 'vertical'

                MDLabel:
                    id: welcome_label
                    text: "This is MJ"
                    font_size: 30
                    halign: 'center'
                    size_hint_y: None
                    height: self.texture_size[1]
                    padding_y: 15
                    

                MDTextFieldRound:
                    id: user
                    hint_text: "username"
                    icon_right: "account"
                    size_hint_x: None
                    width: 200
                    font_size: 18
                    pos_hint: {"center_x": 0.5}
                    on_text: app.enable_disable_the_button(root.ids.floatingbutton2024,root.ids.user,root.ids.password)

                MDTextFieldRound:
                    id: password
                    hint_text: "password"
                    icon_right: "eye-off"
                    size_hint_x: None
                    width: 200
                    font_size: 18
                    pos_hint: {"center_x": 0.5}
                    password: True
                    on_text: app.enable_disable_the_button(root.ids.floatingbutton2024,root.ids.user,root.ids.password)


                MDFloatingActionButton:
                    id: floatingbutton2024
                    icon: "login"
                    md_bg_color: [0,0,.5,1]
                    md_text_color: [1,1,1,1]
                    pos_hint: {"center_x": 0.5}
                    disabled: True

                MDRoundFlatButton:
                    text: "Clear fields"
                    font_size: 12
                    pos_hint: {"center_x": 0.5}

结果是，如果两个字段都没有写入任何内容，则按钮保持禁用状态，如果两个字段都已填写，则按钮保持启用状态：

同时输入：