wantedly/ImageHelper

Name: ImageHelper

Owner: Wantedly, Inc.

Description: Convenience extension for UIImage and UIImageView in Swift

Forked from: melvitax/ImageHelper

Created: 2017-01-17 02:27:41.0

Updated: 2017-01-17 02:27:44.0

Pushed: 2017-01-17 02:31:45.0

Homepage: null

Size: 1627

Language: Swift

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README

ImageHelper

Image Extensions for Swift 3.0

Usage

To run the example project, clone or download the repo, and run.

UIImageView Extension

Image from a URL

etches 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.
 imageFromURL(url: String, placeholder: UIImage, fadeIn: Bool = true, closure: ((image: UIImage?)

UIImage Extension

Colors

reates an image from a solid color
age(color:UIColor, size:CGSize)

reates an image from a gradient color
age(gradientColors:[UIColor], size:CGSize)

pplies a gradient overlay to an image
 applyGradientColors(gradientColors: [UIColor], blendMode: CGBlendMode) -> UIImage

reates an image from a radial gradient
age(startColor: UIColor, endColor: UIColor, radialGradientCenter: CGPoint, radius:Float, size:CGSize)

Text

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

Screenshot

reates an image from a UIView
age(fromView view: UIView)

Alpha and Padding

eturns true if the image has an alpha layer
 hasAlpha() -> Bool

eturns a copy(if needed) of the image with alpha layer
 applyAlpha() -> UIImage?

eturns a copy of the image with a transparent border of the given size added around its edges
 applyPadding(padding: CGFloat) -> UIImage?

Crop and Resize

rops an image to a new rect
 crop(bounds: CGRect) -> UIImage?

rops an image to a centered square
 cropToSquare() -> UIImage? {

esizes an image
 resize(size:CGSize, contentMode: UIImageContentMode = .ScaleToFill) -> UIImage?

Circle and Rounded Corners

ounds corners of an image
 roundCorners(cornerRadius:CGFloat) -> UIImage?

ounds corners of an image with border
 roundCorners(cornerRadius:CGFloat, border:CGFloat, color:UIColor) -> UIImage?

ounds corners to a circle
 roundCornersToCircle() -> UIImage?

ounds corners to a circle with border
 roundCornersToCircle(border border:CGFloat, color:UIColor) -> UIImage?

Border

dds a border
 applyBorder(border:CGFloat, color:UIColor) -> UIImage?

Image Effects

pplies a light blur effect to the image
 applyLightEffect() -> UIImage?
pplies a extra light blur effect to the image
 applyExtraLightEffect() -> UIImage?
pplies a dark blur effect to the image
 applyDarkEffect() -> UIImage?
pplies a color tint to an image
 applyTintEffect(tintColor: UIColor) -> UIImage?
pplies a blur to an image based on the specified radius, tint color saturation and mask image
 applyBlur(blurRadius:CGFloat, tintColor:UIColor?, saturationDeltaFactor:CGFloat, maskImage:UIImage? = nil) -> UIImage?

Screen Density

o create an image that is Retina aware, use the screen scale as a multiplier for your size. You should also use this technique for padding or borders.
width = 140 * UIScreen.mainScreen().scale
height = 140 * UIScreen.mainScreen().scale
image = UIImage(named: "myImage")?.resize(CGSize(width: width, height: height))