CustomHeader class

自定义头部刷新指示器

允许开发者完全自定义刷新头部的UI和行为

主要功能：

  • 通过builder自定义UI
  • 支持刷新状态回调
  • 支持偏移量变化回调
  • 支持刷新开始和结束回调

示例用法：

CustomHeader(
  builder: (context, mode) {
    return Container(
      height: 50.0,
      alignment: Alignment.center,
      child: Text(mode.toString()),
    );
  },
  onModeChange: (mode) {
    print('刷新状态变化: $mode');
  },
)
Inheritance

Constructors

CustomHeader({Key? key, required HeaderBuilder builder, AsyncVoidCallback? readyToRefresh, AsyncVoidCallback? endRefresh, OffsetCallback? onOffsetChange, ModeChangeCallback<RefreshStatus>? onModeChange, VoidCallback? onResetValue, double height = 60.0, Duration completeDuration = const Duration(milliseconds: 600), RefreshStyle refreshStyle = RefreshStyle.follow})
构造函数
const

Properties

builder → HeaderBuilder
头部构建器
final
completeDuration → Duration
刷新完成或失败时的停留时间
finalinherited
endRefresh → AsyncVoidCallback?
结束刷新回调
final
hashCode → int
The hash code for this object.
no setterinherited
height → double
指示器的视觉高度
finalinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
offset → double
布局偏移量
finalinherited
onModeChange → ModeChangeCallback<RefreshStatus>?
模式变化回调
final
onOffsetChange → OffsetCallback?
偏移量变化回调
final
onResetValue → VoidCallback?
重置值回调
final
readyToRefresh → AsyncVoidCallback?
准备刷新回调
final
refreshStyle → RefreshStyle
刷新显示样式
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<CustomHeader>
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