Multi-Device Progress Sync

Goal

Load saved data when app starts and listen for changes from other devices.

Actions Required

Action	Purpose
CloudServicesGetValue	Load saved data
CloudServicesOnSavedDataChange	Listen for remote updates
CloudServicesGetChangedKeyInfo	Read key name by index (optional)

Variables Needed

• playerLevel (Int)

• totalScore (Int)

• changedKeys (Array: String) - PlayMaker Array (set element type to String)

• changeReason (Enum: CloudSavedDataChangeReasonCode)

Implementation Steps

1. State: LoadProgress (On App Start)

Action: CloudServicesGetValue

• Inputs:

  • key: "player_level"

  • valueType: Int

• Outputs:

  • value → playerLevel

Repeat for each key you want to load.

2. State: ListenForChanges

Action: CloudServicesOnSavedDataChange

• Outputs:

  • changedKeys → changedKeys array

  • changeReason → changeReason

• Events:

  • dataChangedEvent → HandleRemoteChange

3. State: HandleRemoteChange

Loop keyIndex = 0..changedKeys.Length-1 and for each key:

1. (Optional) CloudServicesGetChangedKeyInfo(keyIndex) → keyName

2. If you need conflict handling, call CloudServicesGetCloudAndLocalCacheValues(keyName) to get both values:

   • decide your policy (cloud wins / local wins / max wins / prompt user)

3. Otherwise, just reload from cloud:

   • If keyName == "player_level" → CloudServicesGetValue("player_level", valueType:Int) and update playerLevel

   • If keyName == "total_score" → CloudServicesGetValue("total_score", valueType:Int) and update totalScore

If you don’t want a loop, you can also directly use PlayMaker Array actions (Array Get / Array Contains) on changedKeys.

Conflict Resolution Strategies

Last Write Wins: Use remote value always Highest Wins: Compare local vs remote, keep higher value Manual Merge: Prompt user to choose