Framing

Swifty approach to defining frame layouts.

Installation

SPM:

.package(url: "https://github.com/ncreated/Framing.git", from: "1.0.0"),

CocoaPods:

pod 'Framing'

What is Framing?

Framing is a tiny framework for defining view frames in more Swifty way. Think of it as a simple wrapper over CGRect that can save you time spend on math calculations when positioning view frames:

let background = Frame(width: 300, height: 300)

let bottomLine1 = Frame(width: 300, height: 20)
    .putInside(background, alignTo: .bottomCenter)

let bottomLine2 = Frame(width: 300, height: 30)
    .putAbove(bottomLine1)

let F1 = Frame(width: 50, height: 180)
    .putInside(background, alignTo: .middleLeft)
    .offsetBy(x: 90, y: -10)

let F2 = Frame(width: 70, height: 50)
    .putOnRight(of: F1, alignTo: .top)

let F3 = F2.offsetBy(y: 70)

The Frame has a .rect property that returns CGRect that can be used for UIView (e.g. greenView.frame = bottomLine2.rect).

What Framing is not?

It's not an animal 🐷 or UI / Layout framework. It doesn't import UIKit anywhere.

What you can do with Framing?

This will return frame moved by 10pt in both directions:

frame.offsetBy(x: 10, y: 10)

This will return frame that is 5pt smaller in each direction:

frame.inset(top: 5, left: 5, bottom: 5, right: 5)

This will return frame that is put above/below base frame:

frame.putAbove(base, alignTo: .left)
frame.putAbove(base, alignTo: .right)
frame.putAbove(base, alignTo: .center)
frame.putBelow(..., alignTo: ...) // ...

The same for left/right positioning:

frame.putOnLeft(of: base, alignTo: .top)
frame.putOnLeft(of: base, alignTo: .bottom)
frame.putOnLeft(of: base, alignTo: .middle)
frame.putOnRight(of: ..., alignTo: ...) // ...

This will return frame that is put inside base frame:

frame.putInside(base, alignTo: .topLeft)
frame.putInside(base, alignTo: .topCenter)
...
frame.putInside(base, alignTo: .middleCenter) // centers `frame` inside `base`
...

This will divide frame into 5 columns and return 2nd column frame:

frame.divideIntoEqual(columns: 5, take: 1)

The same for rows:

frame.divideIntoEqual(rows: 5, take: 1)

It's also possible to apply transforms conditionally:

let shouldBeOffsetted: Bool = ...
frame.if(condition: shouldBeOffsetted,
         then: { $0.offsetBy(x: 10).inset(top: 5) },
         else: { $0.inset(top: 5) })
         
// Or simpler:
frame.inset(top: 5)
     .if(shouldBeOffsetted) { $0.offsetBy(x: 10) }

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Missing some API? Open a Pull Request or fill in the Issue.

License

Framing is released under the MIT license. See the LICENSE file for more details.