ios 一个正则表达式测试（只可输入中文、字母和数字）

NSString * regex = <span style="color:#8000;"><span class="variable" style="color:#08080;">@"</span></span><span style="color:#8000;">^[A-Za-z<span class="number" style="color:#09999;">0</span>-<span class="number" style="color:#09999;">9</span>]{<span class="number" style="color:#09999;">9</span>,<span class="number" style="color:#09999;">15</span>}<span class="variable" style="color:#08080;">$</span></span><span class="variable" style="color:#08080;"><span style="color:#8000;">"</span></span><span style="color:#8000;"></span><span style="color:#000000;">;
    NSPredicate </span><span class="variable" style="color:#08080;">*pred</span> = [NSPredicate predicateWithFormat:<span style="color:#8000;"><span class="variable" style="color:#08080;">@"</span></span><span style="color:#8000;">SELF MATCHES <span class="variable" style="color:#08080;">%@</span></span><span style="color:#8000;"><span class="string" style="color:#dd1144;">"</span></span><span class="string" style="color:#dd1144;"><span style="color:#000000;">, regex];
    BOOL isMatch </span>= [pred evaluateWithObject:txtfldPhoneNumber.text];</span>

NSString <span class="variable" style="color:#08080;">*regex</span> = <span style="color:#8000;"><span class="variable" style="color:#08080;">@"</span></span><span style="color:#8000;">[a-zA-Z\u4e0<span class="number" style="color:#09999;">0</span>-\u9fa5][a-zA-Z<span class="number" style="color:#09999;">0</span>-<span class="number" style="color:#09999;">9</span>\u4e0<span class="number" style="color:#09999;">0</span>-\u9fa5]+</span><span style="color:#8000;"><span class="string" style="color:#dd1144;">"</span></span><span class="string" style="color:#dd1144;"><span style="color:#000000;">;
    NSPredicate </span><span class="variable" style="color:#08080;">*pred</span> = [NSPredicate predicateWithFormat:<span style="color:#8000;"><span class="variable" style="color:#08080;">@"</span></span><span style="color:#8000;">SELF MATCHES <span class="variable" style="color:#08080;">%@</span></span><span style="color:#8000;">"</span></span><span style="color:#8000;"></span><span style="color:#000000;">, regex];



</span><span style="color:#00ff;"><span class="keyword" style="color:#333333;font-weight: bold;">if</span></span>(!<span style="color:#000000;">[pred evaluateWithObject: nickNameTextField.text])
    {
        </span><span style="color:#0800;"><span class="regexp" style="color:#09926;">/*</span></span><span class="regexp" style="color:#09926;"><span style="color:#0800;">
         /</span></span><span style="color:#0800;"><span class="regexp" style="color:#09926;">//</span><span class="regexp" style="color:#09926;">/此动画为弹出buttonqww
        UIAlertView *alertView = [[UIAlertView alloc]initWithTitle:@"提示" message:@"昵称只能由中文、字母或数字组成" delegate:self cancelButtonTitle:@"确定" otherButtonTitles: nil];
        [alertView show];
        return;
         </span></span><span class="regexp" style="color:#09926;"><span style="color:#0800;">*/</span></span><span style="color:#0800;"></span><span style="color:#000000;">
        
        Warning_boxes </span><span class="variable" style="color:#08080;">*reminderView</span> =<span style="color:#000000;"> [[Warning_boxes alloc]init];
        [self.view addSubview:reminderView];
        reminderView.title_alter.text </span>= <span style="color:#8000;"><span class="variable" style="color:#08080;">@"</span></span><span style="color:#8000;">昵称只能由中文、字母或数字组成</span><span style="color:#8000;"><span class="string" style="color:#dd1144;">"</span></span><span class="string" style="color:#dd1144;"><span style="color:#000000;">;
        [reminderView animationStart];
        [reminderView release];
        
        </span><span style="color:#0800;">/*</span><span style="color:#0800;">
         //此动画为在顶上显示文字
        [MPNotificationView notifyWithText:<span class="variable" style="color:#08080;">@"</span>昵称只能由中文、字母或数字组成"</span></span><span style="color:#0800;">
                               andDuration:<span class="number" style="color:#09999;">0</span>.<span class="number" style="color:#09999;">5</span>];
         </span><span style="color:#0800;"><span class="variable" style="color:#08080;">*/</span></span>
        <span style="color:#00ff;"><span class="keyword" style="color:#333333;font-weight: bold;">return</span></span>;

<span style="color:#00ff;"><span class="keyword" style="color:#333333;font-weight: bold;">if</span></span>(![pred evaluateWithObject: nickNameTextField.text])

< input   onkeypress="return   /[\w\u4e00-\u9fa5]/.test(String.fromCharCode(window.event.keyCode))"  
      onpaste="return   !/[^\w\u4e00-\u9fa5]/g.test(window.clipboardData.getData(‘Text‘))"  
      ondragenter="return   false"/>

再粘贴一些别人写的。

1.只能输入数字和英文的： 
<input onkeyup="value=value.replace(/[\W]/g,‘‘) " onbeforepaste="clipboardData.setData(‘text‘,clipboardData.getData(‘text‘).replace(/[^\d]/g,‘‘))" ID="Text1" NAME="Text1">
2.只能输入数字的： 
<input onkeyup="value=value.replace(/[^\d]/g,‘‘) " onbeforepaste="clipboardData.setData(‘text‘,clipboardData.getData(‘text‘).replace(/[^\d]/g,‘‘))" ID="Text2" NAME="Text2">
3.只能输入全角的： 
<input onkeyup="value=value.replace(/[^\uFF00-\uFFFF]/g,‘‘)" onbeforepaste="clipboardData.setData(‘text‘,clipboardData.getData(‘text‘).replace(/[^\uFF00-\uFFFF]/g,‘‘))" ID="Text3" NAME="Text3">
4.只能输入汉字的： 
<input onkeyup="value=value.replace(/[^\u4E00-\u9FA5]/g,‘‘)" onbeforepaste="clipboardData.setData(‘text‘,clipboardData.getData(‘text‘).replace(/[^\u4E00-\u9FA5]/g,‘‘))" ID="Text4" NAME="Text4">
5.邮件地址验证：
var regu = "^(([0-9a-zA-Z]+)|([0-9a-zA-Z]+[_.0-9a-zA-Z-]*[0-9a-zA-Z]+))@([a-zA-Z0-9-]+[.])+([a-zA-Z]{2}|net|NET|com|COM|gov|GOV|mil|MIL|org|ORG|edu|EDU|int|INT)$"
var re = new RegExp(regu);
if (s.search(re) != -1) {
return true;
} else {
window.alert ("请输入有效合法的E-mail地址 ！")
return false;
}
6.身份证：
"^\\d{17}(\\d|x)$"
7.17种正则表达式
"^\\d+$" //非负整数（正整数 + 0） 
"^[0-9]*[1-9][0-9]*$" //正整数 
"^((-\\d+)|(0+))$" //非正整数（负整数 + 0） 
"^-[0-9]*[1-9][0-9]*$" //负整数 
"^-?\\d+$" //整数 
"^\\d+(\\.\\d+)?$" //非负浮点数（正浮点数 + 0） 
"^(([0-9]+\\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\\.[0-9]+)|([0-9]*[1-9][0-9]*))$" //正浮点数 
"^((-\\d+(\\.\\d+)?)|(0+(\\.0+)?))$" //非正浮点数（负浮点数 + 0） 
"^(-(([0-9]+\\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\\.[0-9]+)|([0-9]*[1-9][0-9]*)))$" //负浮点数 
"^(-?\\d+)(\\.\\d+)?$" //浮点数 
"^[A-Za-z]+$" //由26个英文字母组成的字符串 
"^[A-Z]+$" //由26个英文字母的大写组成的字符串 
"^[a-z]+$" //由26个英文字母的小写组成的字符串 
"^[A-Za-z0-9]+$" //由数字和26个英文字母组成的字符串 
"^\\w+$" //由数字、26个英文字母或者下划线组成的字符串 
"^[\\w-]+(\\.[\\w-]+)*@[\\w-]+(\\.[\\w-]+)+$" //email地址 
"^[a-zA-z]+://(\\w+(-\\w+)*)(\\.(\\w+(-\\w+)*))*(\\?\\S*)?$" //url
=============================================
1.取消按钮按下时的虚线框 
在input里添加属性值  hideFocus 或者 HideFocus=true 
  
2.只读文本框内容 
  在input里添加属性值  readonly 
  
3.防止退后清空的TEXT文档(可把style内容做做为类引用) 
<INPUT style=behavior:url(#default#savehistory); type=text id=oPersistInput> 
  
4.ENTER键可以让光标移到下一个输入框 
<input onkeydown="if(event.keyCode==13)event.keyCode=9" > 
  
5.只能为中文(有闪动) 
<input onkeyup="value="/value.replace(/[" -~]/g,’’)" onkeydown="if(event.keyCode==13)event.keyCode=9"> 
  
6.只能为数字(有闪动) 
<input onkeyup="value="/value.replace(/["^\d] /g,’’) "onbeforepaste="clipboardData.setData(’text’,clipboardData.getData(’text’).replace(/[^\d]/g,’’))"> 
  
7.只能为数字(无闪动) 
<input ime- mode:disabled" onkeydown="if(event.keyCode==13)event.keyCode=9" onKeyPress="if ((event.keyCode<48 || event.keyCode>57)) event.returnValue=false"> 
  
8.只能输入英文和数字(有闪动) 
<input onkeyup="value="/value.replace(/[\W] /g,"’’)" onbeforepaste="clipboardData.setData(’text’,clipboardData.getData(’text’).replace(/[^\d]/g,’’))"> 
  
9.屏蔽输入法 
<input type="text" name="url" ime-mode:disabled" onkeydown="if(event.keyCode==13)event.keyCode=9"> 
  
10. 只能输入 数字，小数点，减号（-） 字符(无闪动) 
<input onKeyPress="if (event.keyCode!=46 && amp; event.keyCode!=45 && (event.keyCode<48 || event.keyCode>57)) event.returnValue=false"> 
  
11. 只能输入两位小数，三位小数(有闪动) 
<input maxlength=9 onkeyup="if(value.match(/^\d{3}$/))value=" /value.replace(value,parseInt(value/10))" ;value="/value.replace(/\.\d*\./g,’."’)" onKeyPress="if((event.keyCode<48 || event.keyCode>57) && event.keyCode!=46 && event.keyCode!=45 || value.match(/^\d{3}$/) || /\.\d{3}$/.test(value)) {event.returnValue=false}" id=text_kfxe name=text_kfxe>

javascript正则表达式使用详解