学步园

1,禁止复制粘贴控制文本

把文本的可选(selectable)选项设置为false

 <mx:Text selectable="false" text="This is an example of a multiline text string in a Text control." /> 

2,TextArea 输入文字，如果使其自动移动要需要的位置。

if (space.length == wordLength){
	txtAnswer.text += " ";
	txtAnswer.setSelection(txtAnswer.text.length,txtAnswer.text.length);
}

3,文本全局替换

官方文档：

In the following example, only the first instance of "sh" (case-sensitive) is replaced:
    var myPattern:RegExp = /sh/;  
    var str:String = "She sells seashells by the seashore.";
    trace(str.replace(myPattern, "sch"));  
       // She sells seaschells by the seashore.

In the following example, all instances of "sh" (case-sensitive) are replaced because the g (global) flag is set in the regular expression:

    var myPattern:RegExp = /sh/g;  
    var str:String = "She sells seashells by the seashore.";
    trace(str.replace(myPattern, "sch"));  
       // She sells seaschells by the seaschore.

In the following example, all instance of "sh" are replaced because the g (global) flag is set in the regular expression and the matches are not case-sensitive because the i(ignoreCase) flag is set:

    var myPattern:RegExp = /sh/gi;  
    var str:String = "She sells seashells by the seashore.";
    trace(str.replace(myPattern, "sch"));  
       // sche sells seaschells by the seaschore.