What is content mode?

The content mode specifies how the cached bitmap of the view’s layer is adjusted when the view’s bounds change. This property is often used to implement resizable controls.

What is scale aspect fit?

The option to scale the content to fit the size of the view by maintaining the aspect ratio. Any remaining area of the view’s bounds is transparent.

What is UI view in Xcode?

An object that manages the content for a rectangular area on the screen.

What is setNeedsDisplay?

setNeedsDisplay() Marks the receiver’s entire bounds rectangle as needing to be redrawn.

What is aspect ratio in Swift?

aspectRatio. The ratio of width to height to use for the resulting view.

What is aspect ratio of an image?

In its simplest form, an aspect ratio describes the width of an image in relation to its height. It is commonly written as two numbers and separated by a colon (such as 1:1 or 16:9). Width is always listed as the first number followed by the height.

Which is the content of UITableViewCell?

The UITableViewCell class defines three properties for this cell content: textLabel —A label for the title (a UILabel object) detailTextLabel —A label for the subtitle if there is additional detail (a UILabel object) imageView —An image view for an image (a UIImageView object)

What is a view in iOS?

A view represents a single item on the user interface. Views can detect when a user interacts with them, such as a tap on a button control, but as those interactions happen, views send messages to other objects in your app, usually a view controller, to handle the processing. Views underpin many other objects in iOS.

Is layoutIfNeeded expensive?

You can explicitly call layoutIfNeeded or updateConstraintsIfNeeded at any point in the run loop, keeping in mind that this is potentially expensive.

What is Autolayout aspect ratio?

Currently available ratios: 1:1, 5:4, 4:3, 3:2, 16:10, 1.618:1 (golden ratio), 16:9, 2:1, 21:9 — all in landscape and portrait orientation. Even more added: each ratio has a 50% height pair for vertical centering of nested elements.