用于 Adobe® Flash® Platform 的 ActionScript® 3.0 参考
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spark.effects.animation 

SimpleMotionPath  - AS3 Flex

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如何使用 ActionScript 示例
法律声明
spark.effects.animation
public class SimpleMotionPath
继承SimpleMotionPath Inheritance MotionPath Inheritance Object

语言版本: ActionScript 3.0
产品版本: Flex 4
运行时版本: Flash Player 10, AIR 1.5

SimpleMotionPath 类指定属性名称以及该属性随时间变化而采用的值,例如 Animate 效果。

此类是 MotionPath 的一个简单子类,用于定义包含 valueFromvalueTovalueBy 属性的两个关键帧。MotionPath 类自身可以定义任意数量的关键帧。

默认 MXML 属性keyframes

相关 API 元素



公共属性
 属性由以下参数定义
 Inheritedconstructor : Object
对类对象或给定对象实例的构造函数的引用。
Object
 Inheritedinterpolator : IInterpolator
插补器决定如何计算动画中的中间值。
MotionPath
 Inheritedkeyframes : Vector.<Keyframe>
表示属性在动画过程中所采用的时间/值对的 Keyframe 对象序列。
MotionPath
 Inheritedproperty : String
要设置动画的效果目标上属性的名称。
MotionPath
  valueBy : Object
可指定用于计算 valueFrom 或 valueTo 值的 delta 的可选属性。
SimpleMotionPath
  valueFrom : Object
动画过程中属性的起始值。
SimpleMotionPath
  valueTo : Object
已命名的属性将要设置动画的值。
SimpleMotionPath
公共方法
 方法由以下参数定义
  
SimpleMotionPath(property:String = null, valueFrom:Object = null, valueTo:Object = null, valueBy:Object = null)
构造函数。
SimpleMotionPath
 Inherited
返回此 MotionPath 对象的副本(包含每个关键帧的副本)。
MotionPath
 Inherited
给定已过去时间部分的情况下,计算并返回一个内插值。
MotionPath
 Inherited
表示对象是否已经定义了指定的属性。
Object
 Inherited
表示 Object 类的实例是否在指定为参数的对象的原型链中。
Object
 Inherited
表示指定的属性是否存在、是否可枚举。
Object
 Inherited
设置循环操作动态属性的可用性。
Object
 Inherited
返回此对象的字符串表示形式,其格式设置遵守区域设置特定的约定。
Object
 Inherited
返回指定对象的字符串表示形式。
Object
 Inherited
返回指定对象的原始值。
Object
属性详细信息

valueBy

属性
valueBy:Object

语言版本: ActionScript 3.0
产品版本: Flex 4
运行时版本: Flash Player 10, AIR 1.5

可指定用于计算 valueFromvalueTo 值的 delta 的可选属性。如果未提供必需的 from/to 值,或者这些值是在动画开始时以动态方式确定的,则提供此可选属性使该效果可以计算这些值。

valueBy 值的使用方式取决于设置的是其他值中的哪一个值。如果这两个值都没有设置,则 valueFrom 值是通过目标中的当前属性值确定的,而 valueTo 值则为 valueFrom + valueBy。如果两个值没有同时设置,只设置了其中一个,则未设置的值可通过另一个来计算:valueTo = valueFrom + valueByvalueFrom = valueTo - valueBy。如果同时设置了这两个值,则会忽略 valueBy 属性。

请注意,由于 valueBy 的类型为 Object,效果无法直接通过它计算其他值。它通过调用插补器的 increment()decrement() 方法,使用效果的插补器来计算这些值。如果未设置插补器,则默认情况下它将使用 NumberInterpolator。



实现
    public function get valueBy():Object
    public function set valueBy(value:Object):void

valueFrom

属性 
valueFrom:Object

语言版本: ActionScript 3.0
产品版本: Flex 4
运行时版本: Flash Player 10, AIR 1.5

动画过程中属性的起始值。

值为 Null 或 NaN(对于 Number)表明值必须在运行时以动态方式确定,方法是直接从目标属性获取值,或者在其他值有效且还提供了一个有效的 valueBy 值的情况下计算该值。



实现
    public function get valueFrom():Object
    public function set valueFrom(value:Object):void

valueTo

属性 
valueTo:Object

语言版本: ActionScript 3.0
产品版本: Flex 4
运行时版本: Flash Player 10, AIR 1.5

已命名的属性将要设置动画的值。

值为 Null 或 NaN(对于 Number)的元素表明值必须在运行时以动态方式确定,方法是直接从目标属性获取值,或者在其他值有效且还提供了一个有效的 valueBy 值的情况下计算该值。



实现
    public function get valueTo():Object
    public function set valueTo(value:Object):void
构造函数详细信息

SimpleMotionPath

()构造函数
public function SimpleMotionPath(property:String = null, valueFrom:Object = null, valueTo:Object = null, valueBy:Object = null)

语言版本: ActionScript 3.0
产品版本: Flex 4
运行时版本: Flash Player 10, AIR 1.5

构造函数。您可以同时指定 valueFromvalueTo 参数,也可以在指定 valueBy 参数的同时指定 valueFromvalueTo 参数。如果忽略这些参数,则 Flex 会从效果目标计算它们。

参数
property:String (default = null) — 正在设置动画的属性的名称。
 
valueFrom:Object (default = null) — 属性的初始值。
 
valueTo:Object (default = null) — 属性的最终值。
 
valueBy:Object (default = null) — 用于指定 delta 的可选参数,该 delta 用于计算 from 或 to 值(如果其中一个值被忽略)。




[ X ]为什么显示为英语?
《ActionScript 3.0 参考》中的内容以英语显示

《ActionScript 3.0 参考》中的部分内容未翻译成所有语言。当某个语言元素未翻译时,将显示为英语。例如,ga.controls.HelpBox 类未翻译成任何语言。因此在简体中文版的参考中,ga.controls.HelpBox 类显示为英语。