flash数字数的AS3 (count the number of characters in dynamic text

来源：学生作业帮编辑：拍题作业网作业帮分类：英语作业时间：2024/04/29 01:39:02

flash数字数的AS3 (count the number of characters in dynamic text field)
要制作一个flash,
内容为计算字数.
在stage上有一个dynamic text field为"My email address is XXXX@XXX.XXX,(email-dtf)
在下方有一个空白的dynamic text field作为之后会出现"Your email address is XX characters long." (feedback_dtf)
请问这样的AS要怎么写?
目前只会写这个
feedback_dtf.text="Your email address is" + (something magical goes here) + "characters long.";
完整的应该怎么写?

这里给第一个你说的dynamic text field命名为:targetField
那么你的feedback_dtf.text那句则改为以下几句：
var preStringLength:int="My email address is ".length; //获得除EMAIL以外的文字前缀成
var emailString:String=targetField.text.substring(preStringLength); //得到EMAIL字符串,截取文本框中前缀长度开始的位置
feedback_dtf.text="Your email address is" + emailString.length + "characters long.";
如果还有进一步的需求,好好研究一下AS3自带帮助文档中关于String类的方法吧

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