Form表单
查看源码components/form.go账户字段#
生产 FormFieldLayout 与生产 Input 组合。
username := tree.ID(page, "username")
field := components.PaintFormField(canvas, theme, bounds, components.FormFieldSnapshot{
Label: "Username",
Description: "This name is visible to collaborators.",
Required: true,
ControlID: username,
})
components.PaintInput(canvas, theme, field.Control, components.InputSnapshot{
ID: username, Label: field.Semantics.Label,
Value: value, Hint: field.Semantics.AssistiveText(),
})帮助消息#
字段说明和服务端消息由调用方显式传入。
username := tree.ID(page, "username")
field := components.PaintFormField(canvas, theme, bounds, components.FormFieldSnapshot{
Label: "Username",
Description: "This name is visible to collaborators.",
Message: "Username is available.",
Required: true,
ControlID: username,
})
components.PaintInput(canvas, theme, field.Control, components.InputSnapshot{
ID: username, Label: field.Semantics.Label,
Value: value, Hint: field.Semantics.AssistiveText(),
})验证错误#
错误覆盖普通消息并同步到控件语义。
username := tree.ID(page, "username")
snapshot := components.FormFieldSnapshot{
Label: "Username", Required: true, ControlID: username,
Description: "This name is visible to collaborators.",
}
if utf8.RuneCountInString(value) < 3 {
snapshot.Invalid, snapshot.Error = true, "Use at least three characters."
}
layout := components.PaintFormField(canvas, theme, bounds, snapshot)
components.PaintInput(canvas, theme, layout.Control, components.InputSnapshot{
ID: username, Label: layout.Semantics.Label, Value: value,
Hint: layout.Semantics.AssistiveText(), Invalid: layout.Semantics.Invalid,
})安装
将组件源码复制到自己的项目,直接修改。
go run ./cmd/viva add --out ./components/local form源码组件用法#
此预览直接调用生产 Go 组件。稳定 ID、值与打开状态仍由应用持有;组件只负责绘制并声明交互语义。
- 标题旁的源码链接列出了全部选项与视觉决策。
- 请使用原生命令验证系统文本、焦点、无障碍与平台集成。
- 浏览器预览验证共享布局和场景行为,不代表原生性能。
验证边界#
示例覆盖当前 API 的代表性状态,但不表示每个桌面后端都已完成真机验证。
键盘操作
Tab 在控件间移动;Ctrl/⌘ K 搜索组件。进入预览后,键盘事件由 Go 运行时处理。