83 lines
2.7 KiB
Swift
83 lines
2.7 KiB
Swift
//
|
|
// UIImageExtensions.swift
|
|
// CapFinder
|
|
//
|
|
// Created by User on 13.02.18.
|
|
// Copyright © 2018 User. All rights reserved.
|
|
//
|
|
|
|
import Foundation
|
|
import UIKit
|
|
|
|
extension UIImage {
|
|
|
|
static func templateImage(named: String) -> UIImage {
|
|
return UIImage(named: named)!.withRenderingMode(.alwaysTemplate)
|
|
}
|
|
|
|
/**
|
|
Resize an image to the target size
|
|
*/
|
|
func resize(to targetSize: CGSize) -> UIImage {
|
|
let rect = CGRect(x: 0, y: 0, width: targetSize.width, height: targetSize.height)
|
|
|
|
UIGraphicsBeginImageContextWithOptions(targetSize, false, 1.0)
|
|
self.draw(in: rect)
|
|
let newImage = UIGraphicsGetImageFromCurrentImageContext()
|
|
UIGraphicsEndImageContext()
|
|
return newImage!
|
|
}
|
|
|
|
/**
|
|
Crop an image to a square, centered around the middle of the frame
|
|
- parameter factor: The crop factor of the resulting image
|
|
- returns: The cropped image
|
|
*/
|
|
func crop(factor: CGFloat) -> UIImage {
|
|
let width = self.size.width * factor
|
|
return crop(to: width)
|
|
}
|
|
|
|
/**
|
|
Crop an image to a square, centered around the middle of the frame
|
|
- parameter size: The height and width of the resulting image
|
|
- returns: The cropped image
|
|
*/
|
|
func crop(to size: CGFloat) -> UIImage {
|
|
var rect = CGRect(
|
|
x: (self.size.height - size) / 2,
|
|
y: (self.size.width - size) / 2,
|
|
width: size,
|
|
height: size)
|
|
rect.origin.x *= scale
|
|
rect.origin.y *= scale
|
|
rect.size.width *= scale
|
|
rect.size.height *= scale
|
|
|
|
let imageRef = cgImage!.cropping(to: rect)
|
|
return UIImage(cgImage: imageRef!, scale: scale, orientation: imageOrientation)
|
|
}
|
|
|
|
/// The (circular) image masked by a circle
|
|
var circleMasked: UIImage? {
|
|
let width = size.width
|
|
let height = size.height
|
|
let isPortrait = height > width
|
|
let breadth = min(width, height)
|
|
let breadthSize = CGSize(width: breadth, height: breadth)
|
|
let breadthRect = CGRect(origin: .zero, size: breadthSize)
|
|
UIGraphicsBeginImageContextWithOptions(breadthSize, false, scale)
|
|
defer { UIGraphicsEndImageContext() }
|
|
|
|
let x = isPortrait ? 0 : floor((width - height) / 2)
|
|
let y = isPortrait ? floor((height - width) / 2) : 0
|
|
let rect = CGRect(origin: CGPoint( x: x, y: y), size: breadthSize)
|
|
guard let cgImage = cgImage?.cropping(to: rect) else {
|
|
return nil
|
|
}
|
|
UIBezierPath(ovalIn: breadthRect).addClip()
|
|
UIImage(cgImage: cgImage, scale: 1, orientation: imageOrientation).draw(in: breadthRect)
|
|
return UIGraphicsGetImageFromCurrentImageContext()
|
|
}
|
|
}
|