呈现 API

import appui

state = appui.State(
    show_sheet=False,
    show_alert=False,
    show_confirm=False,
    count=0,
)


def open_sheet():
    state.show_sheet = True


def close_sheet():
    state.show_sheet = False


def open_alert():
    state.show_alert = True


def close_alert():
    state.show_alert = False


def open_confirm():
    state.show_confirm = True


def close_confirm():
    state.show_confirm = False


def add_count():
    state.count += 1


def reset_count():
    state.count = 0
    state.show_confirm = False


def sheet_content():
    return appui.NavigationStack(
        appui.Form([
            appui.Section("Sheet", [
                appui.Text(f"Count: {state.count}"),
                appui.Button("+1", action=add_count),
                appui.Button("Close", action=close_sheet),
            ])
        ]).navigation_title("Sheet")
    )


def body():
    root = (
        appui.Form([
            appui.Section("Actions", [
                appui.Button("Open sheet", action=open_sheet),
                appui.Button("Show alert", action=open_alert),
                appui.Button("Reset count", action=open_confirm)
                    .foreground_color("systemRed"),
            ])
        ])
        .navigation_title("Presentation")
        .sheet(
            is_presented=state.show_sheet,
            content=sheet_content,
            on_dismiss=close_sheet,
            detents="medium_large",
            drag_indicator="visible",
        )
        .alert(
            "Notice",
            message="Alert is visible.",
            is_presented=state.show_alert,
            on_dismiss=close_alert,
        )
        .confirmation_dialog(
            "Reset count?",
            is_presented=state.show_confirm,
            message="This cannot be undone.",
            actions=[
                appui.Button("Reset", action=reset_count, role="destructive"),
                appui.Button("Cancel", action=close_confirm),
            ],
            on_dismiss=close_confirm,
        )
    )

    return appui.NavigationStack(root)


appui.run(body, state=state)

import appui

state = appui.State(items=["Inbox", "Archive", "Later"], last="")


def item_key(item):
    return item


def row_view(item):
    def mark_done():
        state.last = f"Done: {item}"

    def remove_item():
        state.items = [current for current in state.items if current != item]
        state.last = f"Deleted: {item}"

    return (
        appui.Text(item)
        .swipe_actions(actions=[
            appui.Button("Done", action=mark_done),
            appui.Button("Delete", action=remove_item, role="destructive"),
        ])
        .context_menu([
            appui.Button("Mark done", action=mark_done),
        ])
    )


def refresh():
    state.last = "Refreshed"


def body():
    return appui.NavigationStack(
        appui.List([
            appui.Section("Items", [
                appui.ForEach(state.items, row_builder=row_view, key=item_key)
            ]),
            appui.Section("Status", [
                appui.Text(state.last or "No action yet"),
            ]),
        ])
        .navigation_title("Rows")
        .refreshable(refresh)
    )


appui.run(body, state=state)

state.show_sheet = True                 # 自动 coordinator
appui.presentation_present("show_sheet") # 显式 API
appui.presentation_dismiss("show_sheet")
appui.dismiss_all()                   # 关闭所有已注册弹层

state.batch_update(show_sheet=True, token_draft="")  # sheet 走 coordinator，draft 走 rebuild