Register user defaults from Settings.bundle in Swift v1.0

LoadDefaults.swift

// 
//  Loads the DefaultValue for each preference specifier with a Key in your Settings.bundle,
//  
//  For example, if your Settings.bundle has the following entry:
//  
//      <dict>
//          <key>Type</key>
//          <string>PSMultiValueSpecifier</string>
//          <key>Title</key>
//          <string>Frequency</string>
//          <key>Key</key>
//          <string>frequency</string>
//          <key>DefaultValue</key>
//          <integer>15</integer>
//          <key>Titles</key>
//          <array>
//              <string>5 minutes</string>
//              <string>15 minutes</string>
//              <string>30 minutes</string>
//              <string>60 minutes</string>
//          </array>
//          <key>Values</key>
//          <array>
//              <integer>5</integer>
//              <integer>15</integer>
//              <integer>30</integer>
//              <integer>60</integer>
//          </array>
//      </dict>
//  
//  then a userDefault will be created with the key "frequency". You would check the value like this:
//  
//      let kFrequency = "frequency"
//      frequency = _userDefaults.integerForKey(kFrequency)
//  

func loadDefaults() {
    
    let pathStr = NSBundle.mainBundle().bundlePath
    let settingsBundlePath = pathStr.stringByAppendingPathComponent("Settings.bundle")
    let finalPath = settingsBundlePath.stringByAppendingPathComponent("Root.plist")
    let settingsDict = NSDictionary(contentsOfFile: finalPath)
    let prefSpecifierArray = settingsDict?.objectForKey("PreferenceSpecifiers") as NSArray
    
    var defaults:[NSObject:AnyObject] = [:]

    for prefItem in prefSpecifierArray {

        if let key = prefItem.objectForKey("Key") as String! {
            
            let defaultValue:AnyObject? = prefItem.objectForKey("DefaultValue")
            defaults[key] = defaultValue
        }
    }
    
    _userDefaults.registerDefaults(defaults)
}