ios手機號正則表達式

//檢查是否爲手機號的方法
-(BOOL)checkPhoneNumInput:(NSString *)phoneStr
{
    NSString *photoRange = @"^1(3[0-9]|4[0-9]|5[0-9]|7[0-9]|8[0-9])\\d{8}$";//正則表達式
    NSPredicate *regexMobile = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",photoRange];
    BOOL result = [regexMobile evaluateWithObject:phoneStr];
    if (result)
    {
        return YES;
    } else
    {
        return NO;
    }

}