Odd behavior on UIPageControl.

When user changed page in haste, indicator may haven't correct index.

Snackbars in iOS.

Duplication of Snackbars in android material design.

Make UUID from current time base.

Make UUID using uuid_t.

Initialize code for make custom view using UIXib.

Custom view will shows up when call below code after awakeFromXib function.

Custom tableView for use in scrollView.

Connect contentSize to constraint using intrinsicContentSize.

Basic instrument get photos and display.

Display camera roll images using Photos.