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justinlevi/RBResizer.swift - Swift 2.1 UIImage Extension

Forked from HamptonMakes/RBResizer.swift
Last active May 28, 2023 13:22
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Revisions

  1. justinlevi revised this gist Nov 30, 2015. 2 changed files with 62 additions and 59 deletions.
    59 changes: 0 additions & 59 deletions RBResizer.swift
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    Original file line number Diff line number Diff line change
    @@ -1,59 +0,0 @@
    //
    // RBResizer.swift
    // Locker
    //
    // Created by Hampton Catlin on 6/20/14.
    // Copyright (c) 2014 rarebit. All rights reserved.
    //

    import UIKit

    func RBSquareImageTo(image: UIImage, size: CGSize) -> UIImage {
    return RBResizeImage(RBSquareImage(image), size)
    }

    func RBSquareImage(image: UIImage) -> UIImage {
    var originalWidth = image.size.width
    var originalHeight = image.size.height

    var edge: CGFloat
    if originalWidth > originalHeight {
    edge = originalHeight
    } else {
    edge = originalWidth
    }

    var posX = (originalWidth - edge) / 2.0
    var posY = (originalHeight - edge) / 2.0

    var cropSquare = CGRectMake(posX, posY, edge, edge)

    var imageRef = CGImageCreateWithImageInRect(image.CGImage, cropSquare);
    return UIImage(CGImage: imageRef, scale: UIScreen.mainScreen().scale, orientation: image.imageOrientation)
    }

    func RBResizeImage(image: UIImage, targetSize: CGSize) -> UIImage {
    let size = image.size

    let widthRatio = targetSize.width / image.size.width
    let heightRatio = targetSize.height / image.size.height

    // Figure out what our orientation is, and use that to form the rectangle
    var newSize: CGSize
    if(widthRatio > heightRatio) {
    newSize = CGSizeMake(size.width * heightRatio, size.height * heightRatio)
    } else {
    newSize = CGSizeMake(size.width * widthRatio, size.height * widthRatio)
    }

    // This is the rect that we've calculated out and this is what is actually used below
    let rect = CGRectMake(0, 0, newSize.width, newSize.height)

    // Actually do the resizing to the rect using the ImageContext stuff
    UIGraphicsBeginImageContextWithOptions(newSize, false, 1.0)
    image.drawInRect(rect)
    let newImage = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()

    return newImage
    }
    62 changes: 62 additions & 0 deletions RBResizer.swift - Swift 2.1 UIImage Extension
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    Original file line number Diff line number Diff line change
    @@ -0,0 +1,62 @@
    //
    // RBResizer.swift
    // Locker
    //
    // Created by Hampton Catlin on 6/20/14.
    // Copyright (c) 2014 rarebit. All rights reserved.
    // Updated by Justin Winter on 11/29/15.
    //

    extension UIImage {

    func RBSquareImageTo(size: CGSize) -> UIImage? {
    return self.RBSquareImage()?.RBResizeImage(size)
    }

    func RBSquareImage() -> UIImage? {
    let originalWidth = self.size.width
    let originalHeight = self.size.height

    var edge: CGFloat
    if originalWidth > originalHeight {
    edge = originalHeight
    } else {
    edge = originalWidth
    }

    let posX = (originalWidth - edge) / 2.0
    let posY = (originalHeight - edge) / 2.0

    let cropSquare = CGRectMake(posX, posY, edge, edge)

    let imageRef = CGImageCreateWithImageInRect(self.CGImage, cropSquare);
    return UIImage(CGImage: imageRef!, scale: UIScreen.mainScreen().scale, orientation: self.imageOrientation)
    }

    func RBResizeImage(targetSize: CGSize) -> UIImage {
    let size = self.size

    let widthRatio = targetSize.width / self.size.width
    let heightRatio = targetSize.height / self.size.height

    // Figure out what our orientation is, and use that to form the rectangle
    var newSize: CGSize
    if(widthRatio > heightRatio) {
    newSize = CGSizeMake(size.width * heightRatio, size.height * heightRatio)
    } else {
    newSize = CGSizeMake(size.width * widthRatio, size.height * widthRatio)
    }

    // This is the rect that we've calculated out and this is what is actually used below
    let rect = CGRectMake(0, 0, newSize.width, newSize.height)

    // Actually do the resizing to the rect using the ImageContext stuff
    UIGraphicsBeginImageContextWithOptions(newSize, false, UIScreen.mainScreen().scale)
    self.drawInRect(rect)
    let newImage = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()

    return newImage
    }

    }
  2. @HamptonMakes HamptonMakes created this gist Jun 27, 2014.
    59 changes: 59 additions & 0 deletions RBResizer.swift
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,59 @@
    //
    // RBResizer.swift
    // Locker
    //
    // Created by Hampton Catlin on 6/20/14.
    // Copyright (c) 2014 rarebit. All rights reserved.
    //

    import UIKit

    func RBSquareImageTo(image: UIImage, size: CGSize) -> UIImage {
    return RBResizeImage(RBSquareImage(image), size)
    }

    func RBSquareImage(image: UIImage) -> UIImage {
    var originalWidth = image.size.width
    var originalHeight = image.size.height

    var edge: CGFloat
    if originalWidth > originalHeight {
    edge = originalHeight
    } else {
    edge = originalWidth
    }

    var posX = (originalWidth - edge) / 2.0
    var posY = (originalHeight - edge) / 2.0

    var cropSquare = CGRectMake(posX, posY, edge, edge)

    var imageRef = CGImageCreateWithImageInRect(image.CGImage, cropSquare);
    return UIImage(CGImage: imageRef, scale: UIScreen.mainScreen().scale, orientation: image.imageOrientation)
    }

    func RBResizeImage(image: UIImage, targetSize: CGSize) -> UIImage {
    let size = image.size

    let widthRatio = targetSize.width / image.size.width
    let heightRatio = targetSize.height / image.size.height

    // Figure out what our orientation is, and use that to form the rectangle
    var newSize: CGSize
    if(widthRatio > heightRatio) {
    newSize = CGSizeMake(size.width * heightRatio, size.height * heightRatio)
    } else {
    newSize = CGSizeMake(size.width * widthRatio, size.height * widthRatio)
    }

    // This is the rect that we've calculated out and this is what is actually used below
    let rect = CGRectMake(0, 0, newSize.width, newSize.height)

    // Actually do the resizing to the rect using the ImageContext stuff
    UIGraphicsBeginImageContextWithOptions(newSize, false, 1.0)
    image.drawInRect(rect)
    let newImage = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()

    return newImage
    }