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Updating & changing settings plist files with new versions of an app

/ Published in: Objective C
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  1. - (void)readSettings {
  2.  
  3.         // Get Paths
  4.         NSString *defaultSettingsPath = [[NSBundle mainBundle] pathForResource:@"DefaultSettings" ofType:@"plist"];
  5.         NSString *settingsPath = [self.applicationDocumentsPath stringByAppendingPathComponent:@"Settings.plist"];
  6.  
  7.         // Read in Default settings
  8.         self.settings = [NSMutableDictionary dictionaryWithContentsOfFile:defaultSettingsPath];
  9.  
  10.         // Read in Current settings and merge
  11.         NSDictionary *currentSettings = [NSDictionary dictionaryWithContentsOfFile:settingsPath];
  12.         for (NSString *key in [currentSettings allKeys]) {
  13.                 if ([[self.settings allKeys] indexOfObject:key] != NSNotFound) {
  14.                         if (![[currentSettings objectForKey:key] isEqual:[self.settings objectForKey:key]]) {
  15.  
  16.                                 // Different so merge
  17.                                 [self.settings setObject:[currentSettings objectForKey:key] forKey:key];
  18.  
  19.                         }
  20.                 }
  21.         }
  22.  
  23. }
  24.  
  25. - (void)saveSettings {
  26.         if (self.settings) {
  27.                 NSString *settingsPath = [self.applicationDocumentsPath stringByAppendingPathComponent:@"Settings.plist"];
  28.                 [self.settings writeToFile:settingsPath atomically:YES];
  29.         }
  30. }

URL: http://stackoverflow.com/questions/1609305/updating-changing-settings-plist-files-with-new-versions-of-an-app

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