ActionScript 3 限制输入文本字段中的行数

Posted 2021-05-23

var prevText:String;
inputfield.addEventListener(Event.CHANGE, onUpdate);
 
private function onUpdate(e:Event):void {
     if (inputfield.textHeight >= inputfield.height){
           inputfield.text = prevText;
     }else prevText= inputfield.text;
}