joshdholtz / rekt-swift

Functional approach to altering CGRect

Rekt-Swift

Functional approach to altering CGRect

Features

• Alter CGRect in a more functional and declarative way
  • Alter everything at once (x, y, width, height)
  • Or alter by chaining individual calls for each

Quick Example

Replay the "Ugly Way" with the "Good Looking Way" 😊

Ugly Way

var rect = someFrame
rect.origin.x += 10
rect.origin.y += 5
rect.size.width = 200
rect.size.height = 100

Good Looking Way

// Alter x, y, width, and height all at once
// Return a tuple of (x,y,width,height)
let rect = someFrame.alter { (x, y, width, height) -> Rekt in
	(x+10,y+5,200,100)
}

// Chain calls for x, y, width, and height together
// Each x, y, width, and height have a function that
// takes a closure and one that takes a value
let rect = someFrame.alterX({$0+10})
	.alterY({$0+5})
	.alterWidth(200)
	.alterHeight(100)

Carthage

Carthage is a decentralized dependency manager that builds your dependencies and provides you with binary frameworks.

You can install Carthage with Homebrew using the following command:

$ brew update
$ brew install carthage

To integrate Rekt into your Xcode project using Carthage, specify it in your Cartfile:

github "joshdholtz/Rekt-Swift" "master"

Run carthage to build the framework and drag the built Rekt.framework into your Xcode project.

Manually

If you prefer not to use either of the aforementioned dependency managers, you can integrate Rekt into your project manually by copying and pasting all the files in the Classes directory.

Usage

Alter All

let rect = someFrame.alter { (x, y, width, height) -> Rekt in
	(x+10,y+5,200,100)
}

Alter All (inout)

• Uses inout variables instead of returning tuple
• Don't need to modify all variables

let rect = someFrame.alter({ (x, y, width, height) -> Void in
	x += 10
	y += 5
	width = 200
	height = 100
	return
})

Alter Individual By Chaining

let rect = someFrame.alterX({$0+10})
	.alterY({$0+5})
	.alterWidth({$0+200})
	.alterHeight({$0+100})

Alter Individual By Value

let rect = someFrame.alterX(10)
	.alterY(5)
	.alterWidth(200)
	.alterHeight(100)

Author

Josh Holtz, [email protected], @joshdholtz

License

Rekt-Swift is available under the MIT license. See the LICENSE file for more info.