Apple Pack Callbacks
What the app's Swift adapter (templates/ios/AssetDropAdapter.swift) reports for one call. Call one of onFinished, onFailed, onPending or onNotDownloaded to end it; anything after the first ending call is ignored. Plain methods rather than lambdas, so progress ticks box no numbers and nothing trips Swift 6's Sendable checks.
Functions
Link copied to clipboard
Link copied to clipboard
Status only: not on the device.
Link copied to clipboard
Download progress; total is 0 when the system does not say.