MotionInMotion Episode 6 - NSCoder, NSCoding, and NSUserDefaults

NSCoder, NSCoding, and NSUserDefaults - MotionInMotion

NSCoder, NSUserDefaultsを使った実装

• コアダータ
• NSCoding Protocol
  • def initWithCoder(decoder)
    • self.title = decoder.decodeObjectForKey('title')
    • self.completed = decoder.decodeBoolForKey('completed')
    • self
  • def encodeWithCoder(encoder)
    • encoder.encodeObject(self.title, forKey:'title')
    • encoder.encodeBool(self.completed, forKey:'completed')
• def storageFile
  • NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, true)[0] + '/todos'
  • load
    • self.todos = NSKeyedUnarchiver.unarchiveObjectWithFile(self.storageFile) ||
  • save
    • NSKeyedArchiver.archiveRootObject(self.todos, toFile:self.storageFile)
• NSUserDefaults
  • load
    • data = NSUserDefaults.standardUserDefaults.objectForKey('todos')
    • self.todos = NSKeyedUnarchiver.unarchiveObjectWithData(data) ||
  • save
    • data = NSKeyedArchiver.archivedDataWithRootObject(self.todos)
    • NSUserDefaults.standardUserDefaults.setObject(data, forKey:'todos')
    • NSUserDefaults.standardUserDefaults.synchronize