PlaceholderTip class

PlaceholderTip

页面中心提示组件，通常用于空页面的占位显示（如无数据、无网络、错误信息等）。

参数

代码示例

PlaceholderTip(
  image: Icon(Icons.cloud_off, size: 100, color: Colors.grey),
  text: '无网络连接，请检查您的网络设置。',
  button: ElevatedButton(
    onPressed: () {},
    child: Text('重试'),
  ),
)

返回

返回一个 Widget，通常为页面中央的占位提示，包括图片、文本和可选按钮。

Inheritance

• Object
• DiagnosticableTree
• Widget
• StatelessWidget
• PlaceholderTip

Constructors

PlaceholderTip({Key? key, required Widget image, required String text, TextStyle? textStyle, Widget? button})

创建一个 PlaceholderTip 组件。

const

Properties

button → Widget?

可选的操作按钮。

final

hashCode → int

The hash code for this object.

no setter, inherited

image → Widget

显示的图片组件。

final

key → Key?

Controls how one widget replaces another widget in the tree.

final, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

text → String

提示文本。

final

textStyle → TextStyle?

提示文本的样式，默认为灰色14号字体。

final

Methods

build(BuildContext context) → Widget

构建占位提示组件。

override

createElement() → StatelessElement

Creates a StatelessElement to manage this widget's location in the tree.

inherited

debugDescribeChildren() → List<DiagnosticsNode>

Returns a list of DiagnosticsNode objects describing this node's children.

inherited

debugFillProperties(DiagnosticPropertiesBuilder properties) → void

Add additional properties associated with the node.

inherited

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode

Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.

inherited

toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) → String

A string representation of this object.

inherited

toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug, int wrapWidth = 65}) → String

Returns a string representation of this node and its descendants.

inherited

toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String

Returns a one-line detailed description of the object.

inherited

toStringShort() → String

A short, textual description of this widget.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited