Question

我认为我有最常见的动作脚本错误。在下面的代码中我有一个带有一些TextFields的MovieClip，我想给它们设置动画。当我将类分配给MovieClip时，我收到此错误1118: Implicit coercion of a value with static type Object to a possibly unrelated type flash.text:TextField.。当我trace孩子我得到[Object TextField]并且代码工作正常如果我将它放在第一帧并将其应用于动态文本，那么为什么我在尝试将此代码应用于此时会出现此错误MovieClip的孩子？

是否有机会忘记import任何必要的图书馆？

我已经使TextFields动态化，我已经嵌入了角色并为动画设置了反别名。

package AScripts
{

import flash.display.MovieClip;
import flash.events.Event;
import flash.events.MouseEvent;
import com.greensock.*;
import com.greensock.easing.*;
import flupie.textanim.*;

public class TextFade extends MovieClip {
    private var child : Object;

    public function TextFade( )     
    {
        /*    for (var i : int = 0; i < numChildren; i++  )  {
              child = getChildAt( i );
              trace( child );  
        */
            child = getChildAt( 0 );
            var txtanim:TextAnim = new TextAnim( child ); // <-- Error
                            /* TextAnim expects a TextField as argument */
            txtanim.mode = TextAnimMode.RANDOM;
            txtanim.split = TextAnimSplit.WORDS;
            txtanim.effects = myEffect;
            txtanim.start();
    }
    function myEffect( block:TextAnimBlock ) : void
    {
        TweenLite.to( block , .5 , {alpha : 0 , delay : Math.random( ) * 1 } );
    }   
  }
}

更新：我提出了改变并付诸实施。

import flash.text.*;
private var child : TextField;
child = getChildAt( i ) as TextField;

Answer 1

当您获得对象或更改子var的声明时，您可以将子项转换为Object：

// cast as TextField
public function TextFade( )     
{
    child = getChildAt( 0 ) as Object;
    // ... rest of method


// change declaration of child
public class TextFade extends MovieClip {
    private var child : TextField;

Answer 2

试试这个：

try 
{
    // Need to explicitly cast the child to TextField otherwise
    // we are making an implicit cast and will get an error.
    var textField:TextField = child as TextField; 
    var txtanim:TextAnim = new TextAnim( textField); 
} 
catch (error) 
{
    // unable to cast to a textfield, handle this error if necessary.
}

TextField上的隐式强制错误

2 个答案: