神奇的TextField(1)

先看一大段测试代码，每个小方法的注释行是输出结果。

private var text_content:TextField;

private function textFieldDemo():void{
text_content=new TextField();
addChild(text_content);
textFieldDemo26();
}

private function textFieldDemo1():void{
trace(text_content.width);
text_content.text="nihao";
trace(text_content.width);
text_content.autoSize="left";
trace(text_content.width);
//text正常显示，输出100 100 30
}

private function textFieldDemo12():void{
text_content.multiline=true;
trace(text_content.width);
text_content.text="nihao";
trace(text_content.width);
text_content.autoSize="left";
trace(text_content.width);
//text正常显示，输出100 100 30
}

private function textFieldDemo13():void{
text_content.wordWrap=true;
trace(text_content.width);
text_content.text="nihao";
trace(text_content.width);
text_content.autoSize="left";
trace(text_content.width);
//text正常显示，输出100 100 100
}

private function textFieldDemo14():void{
trace(text_content.width);
text_content.text="nihao";
trace(text_content.width);
text_content.autoSize="left";
trace(text_content.width);
text_content.wordWrap=true;
trace(text_content.width);
//text正常显示，输出100 100 30 30
}

private function textFieldDemo15():void{
text_content.width=222;
text_content.wordWrap=true;
trace(text_content.width);
text_content.text="nihao";
trace(text_content.width);
text_content.autoSize="left";
trace(text_content.width);
//text正常显示，输出222 222 222
}

private function textFieldDemo16():void{
text_content.text="nihao";
trace(text_content.width);
text_content.wordWrap=true;
trace(text_content.width);
text_content.autoSize="left";
trace(text_content.width);
//text正常显示，输出100 100 100
}

private function textFieldDemo2():void{
trace(text_content.width);
text_content.autoSize="left";
trace(text_content.width);
text_content.text="nihao";
trace(text_content.width);
//text正常显示，输出100 4 30
}

private function textFieldDemo22():void{
text_content.multiline=true;
trace(text_content.width);
text_content.autoSize="left";
trace(text_content.width);
text_content.text="nihao";
trace(text_content.width);
//text正常显示，输出100 4 30
}

private function textFieldDemo23():void{
text_content.wordWrap=true;
trace(text_content.width);
text_content.autoSize="left";
trace(text_content.width);
text_content.text="nihao";
trace(text_content.width);
//text正常显示，输出100 100 100
}

private function textFieldDemo24():void{
trace(text_content.width);
text_content.autoSize="left";
trace(text_content.width);
text_content.text="nihao";
trace(text_content.width);
text_content.wordWrap=true;
trace(text_content.width);
//text正常显示，输出100 4 30 30
}

private function textFieldDemo25():void{
text_content.width=222;
text_content.wordWrap=true;
trace(text_content.width);
text_content.autoSize="left";
trace(text_content.width);
text_content.text="nihao";
trace(text_content.width);
//text正常显示，输出222 222 222
}

private function textFieldDemo26():void{
text_content.width=222;
text_content.autoSize="left";
trace(text_content.width);
text_content.wordWrap=true;
trace(text_content.width);
text_content.text="nihao";
trace(text_content.width);
//text"不显示"(界面上看不到textfield)，输出4 4 4
}

仔细分析上面的代码执行结果，可以得出如下结论：

1.设置wordwrap,mulitline不会导致width值发生变化，但设置wordwrap可能会对width的值产生影响。

2.设置autosize属性，当wordwrap为false时导致width值发生变化，当wordwrap为true时不对width产生影响。

3.设置text属性，当wordwrap为false并且autosize不为none时，width值才发生变化。否则不对width产生影响。

就是说，wordwrap autosize text对width都有决定作用。