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Recursive function to preload array of PFObjects
/**
Recusivly pre load an array of PFObjects.
- parameter items: The items to preload.
- parameter completion: Invoked once all loading in the background has been completed. If an error occured it will be passed back otherwise `success` will be `true` with a `nil` error parameter.
*/
func preloadItems(items: [PFObject], completion: (success: Bool, error: NSError?) -> ()) {
func recursiveLoad(index: Int) {
if index == items.count {
completion(success: true, error: nil)
return
}
items[index].fetchInBackgroundWithBlock({ (object, error) in
if let err = error {
completion(success: false, error: err)
return
}
else {
recursiveLoad(index + 1)
}
})
}
recursiveLoad(0)
}
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