Composed

Make designing views in layoutSubviews() simpler with extensions to CoreGraphics structs such as CGRect, CGSize, and CGPoint.

Composed is in its early stages of development. Thanks for your interest!

Features

• ☑ Create CGRect from CGSize by pinning to a CGPoint
• ☑ Supports pinning by origin, center, and any corner
• ☑ Easily access CGRect corners by value instead of deriving them
• ☑ Adds convenience functions and variables such as center to CGRect and offset(by:) to CGPoint

Usage

The core concept of layout using Composed is making manual layout easier to read.

// Composed
boxView.frame = CGSize(width: 200, height: 125)
    .setCenter(bounds.center)
    
// CoreGraphics
let boxSize = CGSize(width: 200, height: 125)
boxView.frame = CGRect(
    x: bounds.midX - boxSize.width/2,
    y: bounds.midY - boxSize.height/2,
    width: boxSize.width,
    height: boxSize.height
)

You can chain functions referencing another CGRect's geometry.

// Composed
topLabel.frame = topLabel
    .sizeThatFits(width: boxView.frame.width)
    .setCorner(
        .bottomLeft(
            boxView.frame.corners.topLeft.point
                .offsetBy(dx: 0, dy: -4)
        )
)

let insetBox = boxView.frame.insetBy(dx: 6, dy: 4)
bottomLabel.frame = bottomLabel
    .sizeThatFits(insetBox.size)
    .setCorner(
        .bottomRight(
            insetBox.corners.bottomRight.point
        )
)

// CoreGraphics
let topLabelSize = topLabel.sizeThatFits(
    CGSize(
        width: boxSize.width,
        height: .greatestFiniteMagnitude
    )
)
topLabel.frame = CGRect(
    x: boxView.frame.minX,
    y: boxView.frame.minY - (topLabelSize.height + 4),
    width: topLabelSize.width,
    height: topLabelSize.height
)

let insetBox = boxView.frame.insetBy(dx: 6, dy: 4)
let bottomLabelSize = bottomLabel.sizeThatFits(insetBox.size)
bottomLabel.frame = CGRect(
    x: insetBox.maxX - bottomLabelSize.width,
    y: insetBox.maxY - bottomLabelSize.height,
    width: bottomLabelSize.width,
    height: bottomLabelSize.height
)

Author

Zoe Van Brunt, zvb.io