flash as3 设置文件框焦点focus方法

flash as3 设置文件框焦点focus方法
lash文件和ActionScript文件要放到同一目录下，并且注意ActionScript文件名为类名，在flash文件的属性面板的类中填写focus。

package {

import flash.display.Sprite;
import flash.text.TextField;
import flash.text.TextFieldType;
import flash.events.MouseEvent;

public class Main extends Sprite {

    public function Main( ) {
      var field:TextField = new TextField( );
      field.border = true;
      field.background = true;
      field.type = TextFieldType.INPUT;
      addChild(field);
      var button:Sprite = new Sprite( );
      button.graphics.lineStyle( );
      button.graphics.beginFill(0xFFFFFF);
      button.graphics.drawRect(0, 0, 100, 50);
      button.graphics.endFill( );
      button.addEventListener(MouseEvent.CLICK, onClick);
      button.y = 100;
      addChild(button);
    }

    private function onClick(event:MouseEvent):void {
      stage.focus = TextField(getChildAt(0));
    }

}
}

将空格text设置为焦点代码

package {

import flash.display.Sprite;
import flash.text.TextField;
import flash.text.TextFieldType;
import flash.events.MouseEvent;

public class Main extends Sprite {

    public function Main( ) {
      var field:TextField = new TextField( );
      field.border = true;
      field.background = true;
      field.type = TextFieldType.INPUT;
      addChild(field);
      var button:Sprite = new Sprite( );
      button.graphics.lineStyle( );
      button.graphics.beginFill(0xFFFFFF);
      button.graphics.drawRect(0, 0, 100, 50);
      button.graphics.endFill( );
      button.addEventListener(MouseEvent.CLICK, onClick);
      button.y = 100;
      addChild(button);
    }

    private function onClick(event:MouseEvent):void {
      stage.focus = null;

    }

}
}

设置文本内容并设置其为选择中状态

package {

import flash.display.Sprite;
import flash.text.TextField;
public class Main extends Sprite {
    public function Main( ) {
      var field:TextField = new TextField( );

        stage.focus = field;                  // Set the focus to the text field
        field.text = "this is example text"; // Set the text value
        field.setSelection(0, 0);


        trace(field.caretIndex);
        addChild(field);
    }
}
}

补充：flash教程,As3.0