cocoa touch - When is UITableView's reloadData Synchronous? -

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Reload a UITableView When the Data Method Is Synchronous vs Asynchronous? There is nothing mentioned about this in Apple's documentation, and I have seen that the reload data functions do both synchronous and asynchronous, which really confuse me.

What type of plan does Apple differentiate? Does anyone know?

The update in the UI is always synchronous but it is possible to update the data asynchronously, to reload the data Before making calls and updating synchronous UI.

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