iOS中有关正则表达式的使用

//身份证号码验证

#pragma 正则匹配用户身份证号15或18位

-(BOOL)checkUserIdCard: (NSString *) idCard

{

    NSString *pattern = @"(^[0-9]{15}$)|([0-9]{17}([0-9]|X)$)";

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

    BOOL isMatch = [pred evaluateWithObject:idCard];

    return isMatch;

}

#pragma 正则匹配手机号

+ (BOOL)checkTelNumber:(NSString *) telNumber

{

    NSString *pattern = @"^1+[3578]+\\d{9}";

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

    BOOL isMatch = [pred evaluateWithObject:telNumber];

    return isMatch;

}

#pragma 正则匹配用户密码6-18位数字和字母组合

+ (BOOL)checkPassword:(NSString *) password

{

    NSString *pattern = @"^(?![0-9]+$)(?![a-zA-Z]+$)[a-zA-Z0-9]{6,18}";

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

    BOOL isMatch = [pred evaluateWithObject:password];

    return isMatch;

}

#pragma 正则匹配用户姓名,20位的中文或英文

+ (BOOL)checkUserName : (NSString *) userName

{

    NSString *pattern = @"^[a-zA-Z一-龥]{1,20}";

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

    BOOL isMatch = [pred evaluateWithObject:userName];

    return isMatch;

}

#pragma 正则匹员工号,12位的数字

+ (BOOL)checkEmployeeNumber : (NSString *) number

{

    NSString *pattern = @"^[0-9]{12}";

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

    BOOL isMatch = [pred evaluateWithObject:number];

    return isMatch;

}

#pragma 正则匹配URL

+ (BOOL)checkURL : (NSString *) url

{

    NSString *pattern = @"^[0-9A-Za-z]{1,50}";

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

    BOOL isMatch = [pred evaluateWithObject:url];

    return isMatch;

}

判断字符串是否是数字:

 NSString *pattern = @"^[0-9]*$";
    NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", pattern];
    BOOL isMatch = [pred evaluateWithObject:str];

    return isMatch;