從ABPerson的電話簿中獲取聯系人時未獲得“-”“。”“”

Question

我想按“-”“”“來獲取數字。 從電話簿中獲取聯系人時，這是我的代碼。
我的主要動機是，如果存在+，則從數字中提取國家/地區代碼。
另外，如果還有其他訪問國家/地區代碼的方法，也請提出建議。

    - (BOOL)peoplePickerNavigationController:(ABPeoplePickerNavigationController                                                        *)peoplePicker shouldContinueAfterSelectingPerson:(ABRecordRef)person property:(ABPropertyID)property identifier:(ABMultiValueIdentifier)identifier;
    {
        if (property == kABPersonPhoneProperty) {
            ABMultiValueRef multiPhones = ABRecordCopyValue(person, kABPersonPhoneProperty);
    for(CFIndex i = 0; i < ABMultiValueGetCount(multiPhones); i++) {
        if(identifier == ABMultiValueGetIdentifierAtIndex (multiPhones, i)) {
            CFStringRef phoneNumberRef = ABMultiValueCopyValueAtIndex(multiPhones, i);
            CFRelease(multiPhones);
            NSString *phoneNumber = (__bridge NSString *) phoneNumberRef;
            CFRelease(phoneNumberRef);
            if ([phoneNumber rangeOfString:@"+"].location == NSNotFound) {
                phoneNumber = [phoneNumber stringByReplacingOccurrencesOfString:@"(" withString:@""];
                phoneNumber = [phoneNumber stringByReplacingOccurrencesOfString:@")" withString:@""];
                phoneNumber = [phoneNumber stringByReplacingOccurrencesOfString:@" " withString:@""];
                phoneNumber = [phoneNumber stringByReplacingOccurrencesOfString:@"-" withString:@""];
                phoneNumber = [phoneNumber stringByReplacingOccurrencesOfString:@"." withString:@""];

                self.lblMobileNumber.text = [NSString stringWithFormat:@"%@", phoneNumber];
            } else {
                NSArray *PhoneNumberComponents = [phoneNumber componentsSeparatedByString:@" "];
                NSString * strCountryCode = PhoneNumberComponents[0] ;
                [self.btnCountryCode setTitle:strCountryCode forState:UIControlStateNormal];

                phoneNumber= [phoneNumber stringByReplacingOccurrencesOfString:PhoneNumberComponents[0] withString:@""];
                NSLog(@"countryCodeSepratedStr%@",phoneNumber);
                phoneNumber = [phoneNumber stringByReplacingOccurrencesOfString:@"(" withString:@""];
                phoneNumber = [phoneNumber stringByReplacingOccurrencesOfString:@")" withString:@""];
                phoneNumber = [phoneNumber stringByReplacingOccurrencesOfString:@" " withString:@""];
                phoneNumber = [phoneNumber stringByReplacingOccurrencesOfString:@"-" withString:@""];
                phoneNumber = [phoneNumber stringByReplacingOccurrencesOfString:@"." withString:@""];
                self.lblMobileNumber.text = [NSString stringWithFormat:@"%@", phoneNumber];

            }

        }
    }
  }
  return NO;
 }

Answer 1

我不會傾向於做任何字符串處理的事情，而只是使用正則表達式在字符串的開頭查找+后跟數字，並使用捕獲括號僅捕獲國家/地區代碼：

NSError *error;
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"^\\s*\\+\\s*(\\d+)[^\\d]*(.*)$" options:0 error:&error];

NSTextCheckingResult *result = [regex firstMatchInString:phoneNumber options:0 range:NSMakeRange(0, [phoneNumber length])];
if (result) {
    NSString *countryCode = [phoneNumber substringWithRange:[result rangeAtIndex:1]];
    NSString *phoneNumberWithoutCountryCode = [phoneNumber substringWithRange:[result rangeAtIndex:2]];
} else {
    // no country code found
}