func compositionPickerViewDidStartAnimating (QCCompositionPickerView!)
Performs custom tasks when the composition picker view starts animating a composition.
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func compositionPickerViewWillStopAnimating(_ pickerView: QCCompositionPickerView
!)
pickerView
The composition picker view in which the composition stopped animating.
Quartz Composer invokes this method whenever the composition picker view stops animating a composition. Implement this method if you want to perform custom tasks at that time.
func compositionPickerViewDidStartAnimating (QCCompositionPickerView!)