判断邮箱的合法状态

//邮箱合法

+ (BOOL)xfunc_isEmail:(NSString*)email

{

NSString *regex = @"^[\\w-]+(\\.[\\w-]+)*@[\\w-]+(\\.[\\w-]+)+$";

NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];

return [pred evaluateWithObject:email];

}