我正在访问iPhone上的地址簿，并将电话号码存储在名为numberValues的NSString对象中。最初这些电话号码被大量额外的垃圾包围，如引号，加号，括号，空格等。所以我有所有这些rangeOfString和stringByReplacingOccurencesOf方法调用设置来摆脱所有额外的代码。
删除所有额外的垃圾后，我留下了10位数的电话号码，这就是全部。因此，如果联系人有1个电话号码，那么我的numberValues对象的长度属性应为10.如果联系人有2个电话号码，那么我的numberValues对象的长度属性应为20。
这就是奇怪的。当我在一个电话号码的联系人上使用NSLog numberValues.length时，它会向控制台输出12的长度。如果我在有两个电话号码的联系人上做同样的事情，它会在控制台上打印23的长度。
我不明白为什么当我花时间删除所有额外的垃圾（包括空格）时，长度属性是用臃肿的数字打印，当我NSLog的numberValues对象时，你可以在日志中清楚地看到它包含10位数的电话号码，仅此而已。
当我执行NSLog(@"%@", numberValues)时，以下是如何将1个电话号码的联系人打印到日志中：
2014-01-19 10:36:54.912 PhotoTest1[2658:60b]
9495553119
请记住，当我NSLog(@"%d", numberValues.length)时，它会打印出来。
当我执行NSLog(@"%@", numberValues)时，以下是如何将2个电话号码的联系人打印到日志中：
014-01-19 10:36:54.737 PhotoTest1[2658:60b]
7142973557
7149557735
请记住，当我NSLog(@"%d", numberValues.length)时，它会打印出23。
为什么长度属性比它们应该长的任何想法？
感谢您的帮助。
编辑：以下是我成功访问用户地址簿之后开始的所有代码，然后一直到我开始访问numberValues对象的length属性的地方：
int z = allContacts.count - 1;
for (int i = 0; i < z; i++)
{
NSArray *allContacts = (__bridge_transfer NSArray
*)ABAddressBookCopyArrayOfAllPeople(m_addressbook);
ABRecordRef contactPerson = (__bridge ABRecordRef)allContacts[i];
NSString *firstName = (__bridge_transfer NSString
*)ABRecordCopyValue(contactPerson, kABPersonFirstNameProperty);
ABMultiValueRef *phoneNumber = ABRecordCopyValue(contactPerson, kABPersonPhoneProperty);
NSMutableArray *numbers = [NSMutableArray array];
//NSLog(@"The count: %ld", ABMultiValueGetCount(phoneNumber));
NSString *number = (__bridge_transfer NSString*)ABMultiValueCopyArrayOfAllValues(phoneNumber);
[numbers addObject:number];
NSString *numberValues = [[NSString alloc]initWithFormat:@"%@", number];
NSLog(@"Here are the numbers for the contact named %@: %@", firstName, numberValues);
if([numberValues rangeOfString:@"+"].location == NSNotFound) {
NSLog(@"Phone Number does not contain a plus sign.");
} else {
numberValues = [numberValues stringByReplacingOccurrencesOfString:@"+1" withString:@""];
NSLog(@"This new number value should not have a + anymore: %@", numberValues);
}
if([numberValues rangeOfString:@" ("].location == NSNotFound) {
NSLog(@"No phone numbers contain blank space with start of parentheses");
} else {
NSLog(@"Phone number(s) do contain blank space with start of parentheses");
numberValues = [numberValues stringByReplacingOccurrencesOfString:@" (" withString:@""];
NSLog(@"The new number values should not contain a blank space with the start of parentheses: %@", numberValues);
}
if([numberValues rangeOfString:@") "].location == NSNotFound) {
NSLog(@"Phone number(s) do not contain ) and a blank space");
} else {
NSLog(@"Phone numbers do contain ) and a blank space");
numberValues = [numberValues stringByReplacingOccurrencesOfString:@") " withString:@""];
NSLog(@"These new phone number values should not have ) with a blank space after it: %@", numberValues);
}
if([numberValues rangeOfString:@"-"].location == NSNotFound) {
NSLog(@"No numbers contain a dash");
} else {
NSLog(@"Number(s) does contain a dash");
numberValues = [numberValues stringByReplacingOccurrencesOfString:@"-" withString:@""];
NSLog(@"The new number values should not have any dashes: %@", numberValues);
}
if([numberValues rangeOfString:@"("].location == NSNotFound) {
NSLog(@"Number(s) do not contain a (");
} else {
NSLog(@"Number(s) contains a (");
numberValues = [numberValues stringByReplacingOccurrencesOfString:@"(" withString:@""];
NSLog(@"The new number(s) should not have any ( in them: %@", numberValues);
}
if ([numberValues rangeOfString:@"\""].location == NSNotFound) {
NSLog(@"Number does not contain any quotations");
} else {
NSLog(@"Number(s) do contain quotations");
numberValues = [numberValues stringByReplacingOccurrencesOfString:@"\"" withString:@""];
NSLog(@"Numbers should not have any quotations: %@", numberValues);
}
if([numberValues rangeOfString:@")"].location == NSNotFound) {
NSLog(@"The final ) has been deleted");
} else {
NSLog(@"Need to delete the final )");
numberValues = [numberValues stringByReplacingOccurrencesOfString:@")" withString:@""];
NSLog(@"Final value(s) should not have a trailing ) at the end: %@", numberValues);
}
if([numberValues rangeOfString:@","].location == NSNotFound) {
NSLog(@"The final , has been deleted");
} else {
NSLog(@"Need to delete the final ,");
numberValues = [numberValues stringByReplacingOccurrencesOfString:@"," withString:@""];
NSLog(@"%@", numberValues);
NSLog(@"Final value(s) should not have a trailing , at the end: %lu", (unsigned long)numberValues.length);
}
if([numberValues rangeOfString:@" "].location == NSNotFound) {
NSLog(@"No blank spaces.");
} else {
NSLog(@"There are blank spaces that need to be deleted");
numberValues = [numberValues stringByReplacingOccurrencesOfString:@" " withString:@""];
NSLog(@"%@", numberValues);
}
NSLog(@"RIGHT BEFORE THE NEW IF STATEMENT");
NSLog(@"%d", numberValues.length);
if(numberValues.length < 11) {
NSLog(@"RUNNING PFQUERY");
PFQuery *query = [PFQuery queryWithClassName:@"_User"];
[query whereKey:@"username" equalTo:numberValues];
[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (!error) {
NSLog(@"Here are the objects that have been returned from Parse: %@", objects);
} else {
NSLog(@"CHARACTERS: %d", numberValues.length);
int howManyNumbers = numberValues.length / 10;
NSLog(@"%d", howManyNumbers);
}
编辑2对于VEDDERMATIC的评论：
我刚刚做了NSLog(@"###%@###", numberValues);，这就是它打印到日志的方式：
2014-01-19 11:06:00.529 PhotoTest1[2678:60b] ###
3097679973
###
答案 0 :(得分：2)
长度正确，有更多字符表示您没有剥离。 NSString支持超过一百万个字符，您无法检查所有字符。
相反，您应该使用RegEx删除不是数字的所有内容。
NSRegularExpression* regex = [NSRegularExpression regularExpressionWithPattern:@"[^0-9]" options:0 error:nil];
NSString *phoneNumber = [regex stringByReplacingMatchesInString:phoneNumber options:0 range:NSMakeRange(0, phoneNumber.length) withTemplate:@""];