iPhone update application version (in Settings) [duplicate]

Question

Possible Duplicate:
How can I display the application version revision in my application's settings bundle?

I have an iPhone application that displays the current version as a Settings constant (just like Skype does).

When I released the first version of the application, I use this code to set the app Settings:

- (void)registerDefaultsFromSettingsBundle {
    NSString *settingsBundle = [[NSBundle mainBundle] pathForResource:@"Settings" ofType:@"bundle"];
    if(!settingsBundle) {
        NSLog(@"Could not find Settings.bundle");
        return;
    }

    NSDictionary *settings = [NSDictionary dictionaryWithContentsOfFile:[settingsBundle stringByAppendingPathComponent:@"Root.plist"]];
    NSArray *preferences = [settings objectForKey:@"PreferenceSpecifiers"];

    NSMutableDictionary *defaultsToRegister = [[NSMutableDictionary alloc] initWithCapacity:[preferences count]];
    for(NSDictionary *prefSpecification in preferences) {
        NSString *key = [prefSpecification objectForKey:@"Key"];
        if(key) {
            [defaultsToRegister setObject:[prefSpecification objectForKey:@"DefaultValue"] forKey:key];

        }
    }

    [[NSUserDefaults standardUserDefaults] registerDefaults:defaultsToRegister];
    [defaultsToRegister release];
}

And this worked fine and dandy.

The problem I face now is that if you update the application, these defaults (Settings) are nor re-written, so the application version is not updated.

How can I force that an specific Settings is set on every install?

Thanks Gonso

Answer 1

You can use the following 'Run Script' Build Phase:

CFBundleShortVersionString=`/usr/libexec/PlistBuddy -c "Print :CFBundleShortVersionString" ${SRCROOT}/YourApp/YourApp-Info.plist`
CFBundleVersion=`/usr/libexec/PlistBuddy -c "Print :CFBundleVersion" ${SRCROOT}/YourApp/YourApp-Info.plist`
/usr/libexec/PlistBuddy -c "Set :PreferenceSpecifiers:3:DefaultValue '${CFBundleShortVersionString} (${CFBundleVersion})'" ${SRCROOT}/YourApp/Settings.bundle/Root.plist

All you need to do, is to replace YourApp with your app's name and set the appropriate keypath.

In my case, I have 4 items in the PreferenceSpecifiers array, and I need to set the value for the last item from the array and that's why I used ':PreferenceSpecifiers:3:DefaultValue'

Answer 2

I have this code in my application delegate's -applicationDidFinishLaunching:

#if DDEBUG // debugging/testing
    NSString *versionString = [NSString stringWithFormat:@"v%@",[[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleVersion"]];
#else
    NSString *versionString = [NSString stringWithFormat:@"Version %@",[[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleShortVersionString"]];
#endif // DDEBUG
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    [defaults setValue:versionString forKey:@"version"];
    printf("Version: = %s\n", [versionString cStringUsingEncoding:NSMacOSRomanStringEncoding]);
    [defaults synchronize]; // force immediate saving of defaults.

But app has to be run before Settings 'version' updates to reflect the change.