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Naturally, Indicator of ScrollView is visible when the content view of ScrollView is longer than ScrollView height and user drag on Screen. As we all know It is a default functionality, we can't make it always visible directly.

Using flashScrollIndicators() method we can make it visible.

Example

override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(true)
        scrollView.flashScrollIndicators()
    }

But indicator only appears for some time after viewDidAppear method…

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