Vaberer/AFImageHelper

Convenience extension for UIImage and UIImageView in Swift

AF+Image+Helper 1.04

Convenience extension for UIImage and UIImageView in Swift A collection of extensions for handling image creation from colors and gradients, cropping, scaling and fetching from the web with support for caching.

Works with Swift 1.2

UIImageView Extension

Image from a URL

imageFromURL(url: String, placeholder: UIImage, fadeIn: Bool = true, closure: ((image: UIImage?) -> ())? = nil)
// Fetches an image from a URL. The cached image is returned if available, otherise the placeholder is set until the backaground fetch returns a proper image.

UIImage Extension

Image from a URL

UIImage.imageFromURL(url: String, placeholder: UIImage, shouldCacheImage: Bool = true, closure: (image: UIImage?) -> ()) -> UIImage?
// Fetches an image from a URL. If caching is set, it will be cached by NSCache for future queries. The cached image is returned if available, otherise the placeholder is set. When the image is returned, the closure gets called.

Colors

UIImage(color:UIColor, size:CGSize)
// Creates an image from a solid color
UIImage(gradientColors:[UIColor], size:CGSize) 
// Creates an image from a gradient color
func applyGradientColors(gradientColors: [UIColor], blendMode: CGBlendMode) -> UIImage 
// Applies a gradient overlay to an image
UIImage(startColor: UIColor, endColor: UIColor, radialGradientCenter: CGPoint, radius:Float, size:CGSize)
// Creates an image from a radial gradient

Text

UIImage(text: String, font: UIFont, color: UIColor, backgroundColor: UIColor, size:CGSize, offset: CGPoint)
// Creates an image with a string of text

Screenshot

UIImage(fromView view: UIView)
// Creates an image from a UIView 

Alpha and Padding

func hasAlpha() -> Bool
// Returns true if the image has an alpha layer
func applyAlpha() -> UIImage 
// Returns a copy(if needed) of the image with alpha layer 
func applyPadding(padding: CGFloat) -> UIImage 
// Returns a copy of the image with a transparent border of the given size added around its edges
func imageRefWithPadding(padding: CGFloat, size:CGSize) -> CGImageRef 

Crop and Resize

func crop(bounds: CGRect) -> UIImage 
// Crops an image to a new rect
func cropToSquare() -> UIImage 
// Crops an image to a centered square
func resize(size:CGSize, contentMode: UIImageContentMode = .ScaleToFill) -> UIImage 
// Resizes an image

Circle and Rounded Corners

func roundCorners(cornerRadius:CGFloat) -> UIImage
// Rounds corners of an image
func roundCorners(cornerRadius:CGFloat, border:CGFloat, color:UIColor) -> UIImage
// Rounds corners of an image with border
func roundCornersToCircle() -> UIImage
// Rounds corners to a circle
func roundCornersToCircle(#border:CGFloat, color:UIColor) -> UIImage
// Rounds corners to a circle with border

Border

func applyBorder(border:CGFloat, color:UIColor) -> UIImage {
// Adds a border