Universal class

Inheritance
Implementers
Available Extensions

Constructors

Universal({Key? key, bool isScroll = false, bool useSingleChildScrollView = true, bool useListView = false, bool isStack = false, bool isWrap = false, bool expanded = false, bool expand = false, bool intrinsicHeight = false, bool intrinsicWidth = false, double? stepWidth, double? stepHeight, bool isOval = false, bool isClipRRect = false, bool isClipRect = false, bool visible = true, bool offstage = false, bool reverse = false, bool maintainState = false, bool transitionOnUserGestures = false, bool isCircleAvatar = false, bool maintainAnimation = false, bool maintainSize = false, bool maintainSemantics = false, bool maintainInteractivity = false, bool excludeFromSemantics = false, bool noScrollBehavior = true, bool sized = true, bool safeLeft = false, bool safeTop = false, bool safeRight = false, bool safeBottom = false, bool safeLTRB = false, bool enabled = false, double wrapSpacing = 0.0, double runSpacing = 0.0, DragStartBehavior dragStartBehavior = DragStartBehavior.start, Widget replacement = const SizedBox.shrink(), StackFit stackFit = StackFit.loose, MainAxisSize mainAxisSize = MainAxisSize.max, MainAxisAlignment mainAxisAlignment = MainAxisAlignment.start, CrossAxisAlignment crossAxisAlignment = CrossAxisAlignment.center, WrapAlignment wrapAlignment = WrapAlignment.start, WrapAlignment runAlignment = WrapAlignment.start, WrapCrossAlignment wrapCrossAlignment = WrapCrossAlignment.start, VerticalDirection verticalDirection = VerticalDirection.down, Axis direction = Axis.vertical, Axis? scrollDirection, HitTestBehavior behavior = HitTestBehavior.opaque, BorderRadius? borderRadius, Color? color, AlignmentGeometry? alignment, Widget? child, List<Widget>? children, EdgeInsetsGeometry? padding, ScrollPhysics? physics, ScrollController? scrollController, bool? primary, Decoration? foregroundDecoration, Matrix4? transform, Offset? origin, BoxConstraints? constraints, double? width, double? height, EdgeInsetsGeometry? margin, Decoration? decoration, TextBaseline? textBaseline, TextDirection? textDirection, VoidCallback? onPressed, GestureTapCallback? onTap, GestureTapDownCallback? onTapDown, GestureTapUpCallback? onTapUp, GestureTapCancelCallback? onTapCancel, GestureTapDownCallback? onSecondaryTapDown, GestureTapUpCallback? onSecondaryTapUp, GestureTapCancelCallback? onSecondaryTapCancel, GestureTapCallback? onDoubleTap, GestureTapDownCallback? onDoubleTapDown, GestureTapCancelCallback? onDoubleTapCancel, GestureLongPressCallback? onLongPress, GestureLongPressCancelCallback? onLongPressCancel, GestureLongPressDownCallback? onLongPressDown, GestureLongPressStartCallback? onLongPressStart, GestureLongPressMoveUpdateCallback? onLongPressMoveUpdate, GestureLongPressUpCallback? onLongPressUp, GestureLongPressEndCallback? onLongPressEnd, GestureDragDownCallback? onVerticalDragDown, GestureDragStartCallback? onVerticalDragStart, GestureDragUpdateCallback? onVerticalDragUpdate, GestureDragEndCallback? onVerticalDragEnd, GestureDragCancelCallback? onVerticalDragCancel, GestureDragDownCallback? onHorizontalDragDown, GestureDragStartCallback? onHorizontalDragStart, GestureDragUpdateCallback? onHorizontalDragUpdate, GestureDragEndCallback? onHorizontalDragEnd, GestureDragCancelCallback? onHorizontalDragCancel, GestureDragDownCallback? onPanDown, GestureDragStartCallback? onPanStart, GestureDragUpdateCallback? onPanUpdate, GestureDragEndCallback? onPanEnd, GestureDragCancelCallback? onPanCancel, GestureScaleStartCallback? onScaleStart, GestureScaleUpdateCallback? onScaleUpdate, GestureScaleEndCallback? onScaleEnd, GestureForcePressStartCallback? onForcePressStart, GestureForcePressPeakCallback? onForcePressPeak, GestureForcePressUpdateCallback? onForcePressUpdate, GestureForcePressEndCallback? onForcePressEnd, double? radius, String? heroTag, CreateRectTween? createRectTween, HeroFlightShuttleBuilder? flightShuttleBuilder, HeroPlaceholderBuilder? placeholderBuilder, ImageProvider<Object>? backgroundImage, ImageErrorListener? onBackgroundImageError, ImageErrorListener? onForegroundImageError, ImageProvider<Object>? foregroundImage, Color? foregroundColor, double? minRadius, double? maxRadius, CustomClipper? clipper, Size? size, GestureTapCallback? onSecondaryTap, GestureLongPressMoveUpdateCallback? onSecondaryLongPressMoveUpdate, GestureLongPressCallback? onSecondaryLongPressUp, GestureLongPressCallback? onSecondaryLongPress, GestureLongPressEndCallback? onSecondaryLongPressEnd, GestureLongPressStartCallback? onSecondaryLongPressStart, GestureLongPressCancelCallback? onSecondaryLongPressCancel, GestureLongPressDownCallback? onSecondaryLongPressDown, GestureLongPressCallback? onTertiaryLongPress, GestureLongPressCancelCallback? onTertiaryLongPressCancel, GestureLongPressDownCallback? onTertiaryLongPressDown, GestureLongPressEndCallback? onTertiaryLongPressEnd, GestureLongPressMoveUpdateCallback? onTertiaryLongPressMoveUpdate, GestureLongPressStartCallback? onTertiaryLongPressStart, GestureLongPressUpCallback? onTertiaryLongPressUp, GestureTapCancelCallback? onTertiaryTapCancel, GestureTapDownCallback? onTertiaryTapDown, GestureTapUpCallback? onTertiaryTapUp, double? left, double? top, double? right, double? bottom, int? flex, double? opacity, Clip? clipBehavior, double? widthFactor, double? heightFactor, ImageFilter? filter, BoxFit? fit, SystemUiOverlayStyle? systemOverlayStyle, ScrollViewKeyboardDismissBehavior keyboardDismissBehavior = ScrollViewKeyboardDismissBehavior.manual, String? restorationId, BlendMode blendMode = BlendMode.srcOver, UnifiedButtonCategory? unifiedButtonCategory, ValueChanged<bool>? onHover, ValueChanged<bool>? onFocusChange, ButtonStyle? style, FocusNode? focusNode, bool autofocus = false, MaterialStatesController? statesController})
const

Properties

alignment → AlignmentGeometry?
****** Align ****** ///
final
autofocus → bool
final
backgroundImage → ImageProvider<Object>?
foregroundImage > foregroundColor > backgroundImage > color
final
behavior → HitTestBehavior
HitTestBehavior.opaque 自己处理事件 HitTestBehavior.deferToChild child处理事件 HitTestBehavior.translucent 自己和child都可以接收事件
final
blendMode → BlendMode
final
borderRadius → BorderRadius?
ClipRRect剪辑半径
final
bottom → double?
final
child → Widget?
****** child、children ****** /// child < children 两个只有一个有效
final
children → List<Widget>?
final
clipBehavior → Clip?
控制剪辑方式 Clip.none没有剪辑 最快 Clip.hardEdge不抗锯齿 快 Clip.antiAlias抗锯齿 慢 Clip.antiAliasWithSaveLayer抗锯齿和saveLayer 很慢 使用到的组件Stack、ClipRRect、ClipPath、ClipRect、ClipOval、Stack、Flex、SingleChildScrollView
final
clipper → CustomClipper?
****** ClipRRect、ClipPath、ClipRect、ClipOval ****** /// RRect、Path、Rect
final
color → Color?
****** ColoredBox || DecoratedBox || CircleAvatar ****** ///
final
constraints → BoxConstraints?
****** ConstrainedBox ****** ///
final
createRectTween → CreateRectTween?
final
crossAxisAlignment → CrossAxisAlignment
final
decoration → Decoration?
****** DecoratedBox ****** ///
final
direction → Axis
final
dragStartBehavior → DragStartBehavior
GestureDetector、SingleChildScrollView 使用
final
enabled → bool
****** 点击事件相关 ****** ///
final
excludeFromSemantics → bool
final
expand → bool
****** SizedBox ****** ///
final
expanded → bool
expanded=true flex=1 相当于添加Expanded组件
final
filter → ImageFilter?
****** ImageFilter ****** ///
final
fit → BoxFit?
****** FittedBox ****** ///
final
flex → int?
****** Flexible ****** ///
final
flightShuttleBuilder → HeroFlightShuttleBuilder?
final
focusNode → FocusNode?
final
foregroundColor → Color?
final
foregroundDecoration → Decoration?
final
foregroundImage → ImageProvider<Object>?
final
hashCode → int
The hash code for this object.
no setterinherited
height → double?
final
heightFactor → double?
final
heroTag → String?
****** Hero ****** ///
final
intrinsicHeight → bool
****** IntrinsicHeight、IntrinsicWidth ****** ///
final
intrinsicWidth → bool
final
isCircleAvatar → bool
****** CircleAvatar ****** ///
final
isClipRect → bool
final
isClipRRect → bool
final
isOval → bool
final
isScroll → bool
****** 开启滚动 ****** ///
final
isStack → bool
****** Stack ****** ///
final
isWrap → bool
****** Wrap ****** ///
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
keyboardDismissBehavior → ScrollViewKeyboardDismissBehavior
final
left → double?
****** Positioned ****** ///
final
mainAxisAlignment → MainAxisAlignment
****** Flex=Column+Row ****** ///
final
mainAxisSize → MainAxisSize
final
maintainAnimation → bool
final
maintainInteractivity → bool
final
maintainSemantics → bool
final
maintainSize → bool
final
maintainState → bool
final
margin → EdgeInsetsGeometry?
****** Padding ****** ///
final
maxRadius → double?
final
minRadius → double?
final
noScrollBehavior → bool
移出头部和底部蓝色阴影
final
offstage → bool
final
onBackgroundImageError → ImageErrorListener?
final
onDoubleTap → GestureTapCallback?
用户在短时间内触摸了屏幕两次
final
onDoubleTapCancel → GestureTapCancelCallback?
final
onDoubleTapDown → GestureTapDownCallback?
final
onFocusChange → ValueChanged<bool>?
final
onForcePressEnd → GestureForcePressEndCallback?
final
onForcePressPeak → GestureForcePressPeakCallback?
final
onForcePressStart → GestureForcePressStartCallback?
final
onForcePressUpdate → GestureForcePressUpdateCallback?
final
onForegroundImageError → ImageErrorListener?
final
onHorizontalDragCancel → GestureDragCancelCallback?
onHorizontalDragDown没有成功完成时触发
final
onHorizontalDragDown → GestureDragDownCallback?
当一个触摸点开始跟屏幕交互，同时在水平方向上移动时触发
final
onHorizontalDragEnd → GestureDragEndCallback?
水平拖拽结束时触发
final
onHorizontalDragStart → GestureDragStartCallback?
当触摸点开始在水平方向上移动时触发
final
onHorizontalDragUpdate → GestureDragUpdateCallback?
屏幕上的触摸点位置每次改变时，都会触发这个回调
final
onHover → ValueChanged<bool>?
final
onLongPress → GestureLongPressCallback?
用户触摸屏幕时间超过500ms时触发
final
onLongPressCancel → GestureLongPressCancelCallback?
final
onLongPressDown → GestureLongPressDownCallback?
final
onLongPressEnd → GestureLongPressEndCallback?
用户触摸屏幕时间超过500ms时触发结束
final
onLongPressMoveUpdate → GestureLongPressMoveUpdateCallback?
用户触摸屏幕时间超过500ms时移动触摸
final
onLongPressStart → GestureLongPressStartCallback?
用户触摸屏幕时间超过500ms时触发开始
final
onLongPressUp → GestureLongPressUpCallback?
用户触摸屏幕时间超过500ms时抬起触发
final
onPanCancel → GestureDragCancelCallback?
用户触摸了屏幕，但是没有完成Tap的动作时触发
final
onPanDown → GestureDragDownCallback?
当触摸点开始跟屏幕交互时触发
final
onPanEnd → GestureDragEndCallback?
pan操作完成时触发
final
onPanStart → GestureDragStartCallback?
当触摸点开始移动时触发
final
onPanUpdate → GestureDragUpdateCallback?
屏幕上的触摸点位置每次改变时，都会触发这个回调
final
onPressed → VoidCallback?
unifiedButtonCategory!=null 使用UnifiedButton处理点击事件 ****** UnifiedButton ****** ///
final
onScaleEnd → GestureScaleEndCallback?
触摸点不再跟屏幕有任何交互，同时也表示这个scale手势完成
final
onScaleStart → GestureScaleStartCallback?
触摸点开始跟屏幕交互时触发，同时会建立一个焦点为1.0
final
onScaleUpdate → GestureScaleUpdateCallback?
跟屏幕交互时触发，同时会标示一个新的焦点
final
onSecondaryLongPress → GestureLongPressCallback?
final
onSecondaryLongPressCancel → GestureLongPressCancelCallback?
final
onSecondaryLongPressDown → GestureLongPressDownCallback?
final
onSecondaryLongPressEnd → GestureLongPressEndCallback?
final
onSecondaryLongPressMoveUpdate → GestureLongPressMoveUpdateCallback?
final
onSecondaryLongPressStart → GestureLongPressStartCallback?
final
onSecondaryLongPressUp → GestureLongPressCallback?
final
onSecondaryTap → GestureTapCallback?
final
onSecondaryTapCancel → GestureTapCancelCallback?
final
onSecondaryTapDown → GestureTapDownCallback?
****** GestureDetector ****** ///
final
onSecondaryTapUp → GestureTapUpCallback?
final
onTap → GestureTapCallback?
****** GestureDetector ****** /// unifiedButtonCategory==null 使用GestureDetector处理点击事件
final
onTapCancel → GestureTapCancelCallback?
手指取消点击时的回调函数
final
onTapDown → GestureTapDownCallback?
手指按下时的回调函数
final
onTapUp → GestureTapUpCallback?
手指松开时的回调函数
final
onTertiaryLongPress → GestureLongPressCallback?
final
onTertiaryLongPressCancel → GestureLongPressCancelCallback?
final
onTertiaryLongPressDown → GestureLongPressDownCallback?
final
onTertiaryLongPressEnd → GestureLongPressEndCallback?
final
onTertiaryLongPressMoveUpdate → GestureLongPressMoveUpdateCallback?
final
onTertiaryLongPressStart → GestureLongPressStartCallback?
final
onTertiaryLongPressUp → GestureLongPressUpCallback?
final
onTertiaryTapCancel → GestureTapCancelCallback?
final
onTertiaryTapDown → GestureTapDownCallback?
final
onTertiaryTapUp → GestureTapUpCallback?
final
onVerticalDragCancel → GestureDragCancelCallback?
用户突然停止拖拽时触发
final
onVerticalDragDown → GestureDragDownCallback?
当一个触摸点开始跟屏幕交互，同时在垂直方向上移动时触发
final
onVerticalDragEnd → GestureDragEndCallback?
当用户停止移动，这个拖拽操作就被认为是完成了，就会触发这个回调
final
onVerticalDragStart → GestureDragStartCallback?
当触摸点开始在垂直方向上移动时触发
final
onVerticalDragUpdate → GestureDragUpdateCallback?
屏幕上的触摸点位置每次改变时，都会触发这个回调
final
opacity → double?
****** Opacity ****** ///
final
origin → Offset?
final
padding → EdgeInsetsGeometry?
final
physics → ScrollPhysics?
****** SingleChildScrollView ****** ///
final
placeholderBuilder → HeroPlaceholderBuilder?
final
primary → bool?
final
radius → double?
final
replacement → Widget
****** Visibility ****** ///
final
restorationId → String?
final
reverse → bool
final
final
runAlignment → WrapAlignment
final
runSpacing → double
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
safeBottom → bool
final
safeLeft → bool
****** SafeArea ****** ///
final
safeLTRB → bool
final
safeRight → bool
final
safeTop → bool
final
scrollController → ScrollController?
final
scrollDirection → Axis?
final
size → Size?
final
sized → bool
final
stackFit → StackFit
final
statesController → MaterialStatesController?
final
stepHeight → double?
final
stepWidth → double?
final
style → ButtonStyle?
final
systemOverlayStyle → SystemUiOverlayStyle?
****** AnnotatedRegion ****** ///
final
textBaseline → TextBaseline?
final
textDirection → TextDirection?
final
top → double?
final
transform → Matrix4?
****** Transform ****** ///
final
transitionOnUserGestures → bool
final
unifiedButtonCategory → UnifiedButtonCategory?
final
useListView → bool
使用ListView加载滚动
final
useSingleChildScrollView → bool
是否使用 SingleChildScrollView创建滚动组件 页面逻辑复杂时 设置为 false 以提高滑动性能
final
verticalDirection → VerticalDirection
final
visible → bool
final
width → double?
final
widthFactor → double?
final
wrapAlignment → WrapAlignment
final
wrapCrossAlignment → WrapCrossAlignment
final
wrapSpacing → double
final

Methods

build(BuildContext context) → Widget
Describes the part of the user interface represented by this widget.
override
buildAnnotatedRegion(Widget current) → Widget
buildBackdropFilter(Widget current) → Widget
buildCircleAvatar(Widget current) → Widget
buildClip(Widget current, {CustomClipper? clipper}) → Widget
裁剪组件
buildCustomScrollView(List<Widget> slivers) → Widget
buildFittedBox(Widget current) → Widget
buildFlex(List<Widget> children) → Widget
buildFlexible(Widget current) → Widget
buildGestureDetector(Widget current) → Widget
buildHero(Widget current) → Widget
buildListView(List<Widget> children) → Widget
buildOffstage(Widget current) → Widget
buildPadding(Widget current) → Widget
buildSingleChildScrollView(Widget current) → Widget
buildStack(List<Widget> children) → Widget
buildUnifiedButtonCategory(Widget current) → Widget
buildVisibility(Widget current) → Widget
buildWrap(List<Widget> children) → Widget
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}) → 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