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Using the format specification specifier configuration dictionary (plural support) in iOS 7

I am trying to use the new support for more complex localization of plurals in iOS 7. I created a .stringdict file formatted according to the information in the Foundation release notes (and What New In Cocoa WWDC session). I checked that .stringdict is being copied to my application package (and really -[NSBundle pathForResource:...]finds it). However, it +[NSString localizedStringWithFormat:]does not return a string formatted according to the rules in the configuration dictionary.

code:

- (IBAction)textFieldEditingDidEnd:(UITextField *)sender
{
    NSInteger numPeople = [sender.text integerValue];
    self.textView.text = [NSString localizedStringWithFormat:
                          NSLocalizedString(@"%d people are in the room", @"%d people are in the room"), (long)numPeople];
}

Localizable.stringsdict:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
     <key>%d people are in the room</key>
     <dict>
          <key>NSStringLocalizedFormatKey</key>
          <string>%#@num_people_in_room@ in the room</string>
          <key>num_people_in_room</key>
          <dict>
               <key>NSStringFormatSpecTypeKey</key>
               <string>NSStringPluralRuleType</string>
                     <key>NSStringFormatValueTypeKey</key>
                     <string>d</string>
               <key>zero</key>
               <string>No one is</string>
                     <key>one</key>
                     <string>A person is</string>
               <key>two</key>
               <string>Two people are</string>
                     <key>other</key>
                     <string>%d people are</string>
          </dict>
     </dict>
</dict>
</plist>

, : https://www.dropbox.com/s/mfze377g0r1iqde/PluralDemo.zip. , -localizedStringWithFormat:.

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