ImageWidget class

封装图片加载控件，增加图片加载失败时加载默认图片

Inheritance

Constructors

ImageWidget({Key? key, required ImageProvider<Object> image, ImageFrameBuilder? frameBuilder, ImageLoadingBuilder? loadingBuilder, ImageErrorWidgetBuilder? errorBuilder, String? semanticLabel, bool excludeFromSemantics = false, required double width, required double height, Color? color, Animation<double>? opacity, BlendMode? colorBlendMode, required BoxFit fit, AlignmentGeometry alignment = Alignment.center, ImageRepeat repeat = ImageRepeat.noRepeat, Rect? centerSlice, bool matchTextDirection = false, bool gaplessPlayback = false, bool isAntiAlias = false, FilterQuality filterQuality = FilterQuality.low, required String? src, Widget? errorWidget, Widget? loadingWidget, int? cacheWidth, int? cacheHeight, String? assetUrl})
const
ImageWidget.asset(String? assetUrl, {Key? key, AssetBundle? bundle, ImageFrameBuilder? frameBuilder, ImageErrorWidgetBuilder? errorBuilder, String? semanticLabel, bool excludeFromSemantics = false, double? scale, required double width, required double height, Color? color, Animation<double>? opacity, BlendMode? colorBlendMode, BoxFit fit = BoxFit.none, AlignmentGeometry alignment = Alignment.center, ImageRepeat repeat = ImageRepeat.noRepeat, Rect? centerSlice, bool matchTextDirection = false, bool gaplessPlayback = false, bool isAntiAlias = false, String? package, FilterQuality filterQuality = FilterQuality.low, int? cacheWidth, int? cacheHeight, String? src, Widget? errorWidget, Widget? loadingWidget})
ImageWidget.network(String? src, {Key? key, required double width, required double height, double scale = 1.0, Widget? errorWidget, BoxFit fit = BoxFit.none, Widget? loadingWidget, ImageFrameBuilder? frameBuilder, ImageLoadingBuilder? loadingBuilder, ImageErrorWidgetBuilder? errorBuilder, String? semanticLabel, bool excludeFromSemantics = false, Color? color, Animation<double>? opacity, BlendMode? colorBlendMode, AlignmentGeometry alignment = Alignment.center, ImageRepeat repeat = ImageRepeat.noRepeat, Rect? centerSlice, bool matchTextDirection = false, bool gaplessPlayback = false, FilterQuality filterQuality = FilterQuality.low, bool isAntiAlias = false, Map<String, String>? headers, int? cacheWidth, String? assetUrl, int? cacheHeight})

Properties

alignment → AlignmentGeometry
final
assetUrl → String?
本地图片地址
final
cacheHeight → int?
final
cacheWidth → int?
final
centerSlice → Rect?
final
color → Color?
final
colorBlendMode → BlendMode?
final
errorBuilder → ImageErrorWidgetBuilder?
final
errorWidget → Widget?
加载错误时展示Widget
final
excludeFromSemantics → bool
final
filterQuality → FilterQuality
final
fit → BoxFit
适配样式
final
frameBuilder → ImageFrameBuilder?
final
gaplessPlayback → bool
final
hashCode → int
The hash code for this object.
no setterinherited
height → double
图片高度
final
image → ImageProvider<Object>
以下系统Image属性，释义请参考系统Image中注释
final
isAntiAlias → bool
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
loadingBuilder → ImageLoadingBuilder?
final
loadingWidget → Widget?
加载中展示Widget
final
matchTextDirection → bool
final
opacity → Animation<double>?
final
repeat → ImageRepeat
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
semanticLabel → String?
final
src → String?
图片地址
final
width → double
图片宽度
final

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<StatefulWidget>
Creates the mutable state for this widget at a given location in the tree.
override
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