用createtextfield的文字怎么设定到一定长度自动换行,因为字比较多，用newline and \n比较麻烦

文本字段的默认属性如下所示：

type = "dynamic",
border = false,
background = false,
password = false,
multiline = false,
html = false,
embedFonts = false,
variable = null,
maxChars = null

用 createTextField 创建的文本字段可以接收下列默认 TextFormat 对象：

font = "Times New Roman"
size = 12
textColor = 0x000000
bold = false
italic = false,
underline = false
url = ""
target = ""
align = "left"
leftMargin = 0
rightMargin = 0
indent = 0
leading = 0
bullet = false
tabStops = [] (empty array)

示例

下面的示例创建一个宽 300，高 100 的文本字段，其 x 坐标为 100，y 坐标为 100，该文本字段没有边框，文本为红色并带下划线。

_root.createTextField("mytext",1,100,100,300,100);
mytext.multiline = true;
mytext.wordWrap = true;
mytext.border = false;
myformat = new TextFormat();
myformat.color = 0xff0000;
myformat.bullet = false;
myformat.underline = true;
mytext.text = "this is my first test field object text";
mytext.setTextFormat(myformat);