问题描述

在iphone里使用reg-ex验证邮件

在iphone里使用reg-ex验证邮件，代码如下：

+ (BOOL) stringIsValidEmail:(NSString *)checkString;{    NSString *emailRegEx =    @""(?:[a-zA-Z0-9!#$%\&'*+/=?\^_`{|}~-]+(?:\.[a-z0-9!#$%\&'*+/=?\^_`{|}""    @""~-]+)*|""(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\""    @""x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*"")@(?:(?:[a-z0-9](?:[a-""    @""z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:25[0-5""    @""]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-""    @""9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21""    @""-\x5a\x53-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\])"";    NSPredicate *emailTest = [NSPredicate predicateWithFormat:@""SELF MATCHES %@"" emailRegEx];     return [emailTest evaluateWithObject:checkString];}

怎么样设置参数可以返回false？

解决方案

看下面代码：

- (BOOL) IsValidEmail:(NSString *)checkString {    BOOL sticterFilter = YES;     NSString *stricterFilterString = @""[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{24}"";    NSString *laxString = @"".+@.+\.[A-Za-z]{2}[A-Za-z]*"";    NSString *emailRegex = sticterFilter ? stricterFilterString : laxString;    NSPredicate *emailTest = [NSPredicate predicateWithFormat:@""SELF MATCHES %@"" emailRegex];    return [emailTest evaluateWithObject:checkString];}