检查NSString包含字母和数字

NSString *inputString = @"abc123";
NSString *pattern = @"^(?=.*[a-zA-Z])(?=.*[0-9]).*$";
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:pattern options:0 error:nil];
NSTextCheckingResult *match = [regex firstMatchInString:inputString options:0 range:NSMakeRange(0, inputString.length)];

if (match) {
    NSLog(@"字符串包含字母和数字");
} else {
    NSLog(@"字符串不包含字母和数字");
}