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我正在使用 Flex 4.5.1 和 AIR 2.7（和 Flash Builder 4.5.1）为 Blackberry Playbook 构建应用程序。

该应用程序有一个大的文本区域，当软键盘出现时需要调整其大小。我能够挂钩软键盘事件并在那里做事。

现在，我想在键盘出现时调整 textarea 的大小以适应屏幕的剩余部分。我知道当前和目标大小，并希望使用流畅的动画来显示 textarea 的大小调整。（我还不能设置高度，并且可以看到 textarea 在keyboard_activating 事件中正确调整大小 - 但我想通过动画来完成）。我尝试过使用 Animate 类、 spark.effects.Move 类，但在这种情况下它们似乎都不起作用。他们似乎在运行动画，但屏幕没有刷新！

我不想在 ViewNavigatorApplication 上使用内置的 resizeAppForKeyboard 属性。我在应用程序描述符中设置为“无”，所以它的一部分很好。

有什么想法/想法吗？我的方法完全正确吗？如何在键盘激活事件中使用动画来调整文本区域的大小？我的代码如下所示：

在主视图中（onCreationComplete 事件）：（txNote 是有问题的文本区域）

txNote.addEventListener(SoftKeyboardEvent.SOFT_KEYBOARD_ACTIVATE, function(e:SoftKeyboardEvent):void {
    toggleEditMode(true);
});

txNote.addEventListener(SoftKeyboardEvent.SOFT_KEYBOARD_DEACTIVATE, function(e:SoftKeyboardEvent):void {
    toggleEditMode(false);
});

private function toggleEditMode(keyboardActivated:Boolean):void {
    trace("toggle edit: " + editMode + ", kb activating: " + keyboardActivated + ", txNote height = " + txNote.height);

    editMode = keyboardActivated;

    //we handle resize manually, because we want a nice animation happening and we want to resize only the text area - nothing else.
    var y:Number = editMode ? -38 : 0;
    var height:Number = editMode ? 218 : 455;
    txNote.moveAndSize(y, height);
}

txNote.moveAndSize 中的代码：

public function moveAndSize(newY:Number, newHeight:Number):void {

//parent group uses BasicLayout
//(this.parent as Group).autoLayout = false;
//resizePath.valueFrom = this.height;
//resizePath.valueTo = newHeight;

//movePath.valueFrom = this.y;
//movePath.valueTo = newY;

//resizeEffect.heightFrom = this.height;
//resizeEffect.heightTo = height;

    this.top = newY;
    moveEffect.xFrom = this.x;
    moveEffect.xTo = this.x;

    moveEffect.yFrom = this.y;
    moveEffect.yTo = newY;

    moveEffect.end();
    moveEffect.play([ this ]);

    //this.move(x, newY);
    //animate.play([ this ]);

    //this.height = height;
    //this.y = y;

    //setLayoutBoundsSize(width, height);
    //setLayoutBoundsPosition(x, y);
}

我试过的moveEffect/movePath/animate各种东西在txNote构造函数中设置如下：

public class NotesArea extends TextArea {
//      private var animate:Animate;
//      private var movePath:SimpleMotionPath;
//      private var resizePath:SimpleMotionPath;

        private var moveEffect:Move;
//      private var resizeEffect:Resize;

        public function NotesArea() {
            super();

//          animate = new Animate();
//          var paths:Vector.<MotionPath> = new Vector.<MotionPath>();
//          movePath = new SimpleMotionPath("top");
//          resizePath = new SimpleMotionPath("height");
//          paths.push(movePath);
            //paths.push(resizePath);

//          animate.duration = 300;
//          animate.motionPaths = paths;

//          animate.addEventListener(EffectEvent.EFFECT_UPDATE, function(e:EffectEvent):void {
//              trace("y = " + y);
//              invalidateDisplayList();
//          });
//          animate.addEventListener(EffectEvent.EFFECT_END, function(e:EffectEvent):void {
//              trace("EFFECT ended: y = " + y);
//          });

            moveEffect = new Move();
            moveEffect.duration = 250;
            moveEffect.repeatCount = 1;
            moveEffect.addEventListener(EffectEvent.EFFECT_END, function (e:EffectEvent):void {
                //(this.parent as Group).autoLayout = true;
                trace("move effect ran. y = " + y + ", top = " + top);
            });

            //this.setStyle("moveEffect", moveEffect);
//
//          resizeEffect = new Resize();
//          resizeEffect.duration = 250;
//          this.setStyle("resizeEffect", resizeEffect);
        }

}
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1 回答 1

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yourTextField.addEventListener(SoftKeyboardEvent.SOFT_KEYBOARD_DEACTIVATE, onActivating);
yourTextField.addEventListener(SoftKeyboardEvent.SOFT_KEYBOARD_ACTIVATING, onActivating); 
yourTextField.addEventListener(SoftKeyboardEvent.SOFT_KEYBOARD_ACTIVATE, onActivating); 

// in the event listener to the textField IE : 

private function onActivating(event:SoftKeyboardEvent):void 
{
  //listen to the event; make your move here.
}
于 2011-07-28T20:06:26.103 回答