page.views.clear() It actually causes the program to run abnormally

[ChinaGodzilla]

import flet as ft

def main(page: ft.Page):
    page.scroll = 'AUTO'
    #page.views.clear()

    for x in range(999):
        aaa = ft.Text(str(x))
        page.add(aaa)
    page.update()

    # 设置页面滚动为自动
    page.scroll = 'AUTO'

    # 更新页面
    page.update()

# 运行应用程序
ft.app(target=main)

page.views.clear()

Disabling it will work fine, but activating it will cause the program to not run properly.

[burhansvural]

import flet as ft


def main(page: ft.Page):
    page.scroll = ft.ScrollMode.AUTO

    # page.views.clear()
    def add_data(e):
        page.controls.clear()
        for x in range(100):
            aaa = ft.Text(str(x))
            page.add(aaa)
        page.add(
            ft.Row(
                controls=[
                    ft.ElevatedButton(
                        text="CLEAR",
                        on_click=clear_all_controls
                    ),
                    ft.ElevatedButton(
                        text="ADD DATA",
                        on_click=add_data
                    )
                ]
            )
        )
        page.update()

    def clear_all_controls(e):
        page.controls.clear()
        page.add(
            ft.Row(
                controls=[
                    ft.ElevatedButton(
                        text="CLEAR",
                        on_click=clear_all_controls
                    ),
                    ft.ElevatedButton(
                        text="ADD DATA",
                        on_click=add_data
                    )
                ]
            )
        )
        page.update()

    page.add(
        ft.Row(
            controls=[
                ft.ElevatedButton(
                    text="CLEAR",
                    on_click=clear_all_controls
                ),
                ft.ElevatedButton(
                    text="ADD DATA",
                    on_click=add_data
                )
            ]
        )
    )


ft.app(target=main)

[ndonkoHenri]

Disabling it will work fine, but activating it will cause the program to not run properly.

Here is the guide on views in relation with navigation and routing: https://flet.dev/docs/getting-started/navigation-and-routing

[burhansvural]

@ChinaGodzilla

another example with view:

import flet as ft


def main(page: ft.Page):
    page.scroll = ft.ScrollMode.AUTO

    # page.views.clear()
    def add_data(e):
        page.views.clear()
        page.views.append(ft.View())

        for x in range(10):
            aaa = ft.Text(str(x))
            page.views[0].controls.append(aaa)

        page.views[0].controls.append(
            ft.Row(
                controls=[
                    ft.ElevatedButton(
                        text="CLEAR",
                        on_click=clear_all_controls
                    ),
                    ft.ElevatedButton(
                        text="ADD DATA",
                        on_click=add_data
                    )
                ]
            )
        )
        page.update()

    def clear_all_controls(e):
        page.views.clear()
        page.views.append(ft.View(controls=[
            ft.Row(
                controls=[
                    ft.ElevatedButton(
                        text="CLEAR",
                        on_click=clear_all_controls
                    ),
                    ft.ElevatedButton(
                        text="ADD DATA",
                        on_click=add_data
                    )
                ]
            )
        ]))
        page.update()

    page.add(
        ft.Row(
            controls=[
                ft.ElevatedButton(
                    text="CLEAR",
                    on_click=clear_all_controls
                ),
                ft.ElevatedButton(
                    text="ADD DATA",
                    on_click=add_data
                )
            ]
        )
    )


ft.app(target=main)