shavit

/*
  Change the opacity of a CIFilter.
*/
func changeOpacity(to opacity: CGFloat, on filter: CIFilter, original image: UIImage) -> CIImage? {
  guard let backgroundImage: CIImage = CIImage(image: image) else { fatalError() }
  
  // The CIColorMatrix filter, will contain the requested filter and control its opacity
  guard let overlayFilter: CIFilter = CIFilter(name: "CIColorMatrix") else { fatalError() }
  let overlayRgba: [CGFloat] = [0, 0, 0, opacity]
  let alphaVector: CIVector = CIVector(values: overlayRgba, count: 4)

m-ruhl

#!/usr/bin/env swift
//
//  faceExtraction.swift
//  FaceITDetection
//
//  Extracts faces detected in images
//
//  Created by NovaTec GmbH on 16.08.17.
//  Copyright © 2017 NovaTec GmbH. All rights reserved.
//

ha1f

//
//  Created by はるふ on 2017/12/11.
//  Copyright © 2017年 ha1f. All rights reserved.
//

import Foundation
import CoreImage
import AVFoundation

extension CIFilter {

smileyborg

import UIKit
import MobileCoreServices

let image = UIImage() // your actual image

let itemProvider = NSItemProvider()
        
itemProvider.registerDataRepresentation(forTypeIdentifier: kUTTypeJPEG as String, visibility: .all) { (completionBlock) -> Progress? in
    let unitsOfWork = 10 + Int64(arc4random_uniform(UInt32(10))) // 10 - 19 units
    let progress = Progress.discreteProgress(totalUnitCount: unitsOfWork)

fzwo

How to download and view legacy documentation from Apple (no need to sign in to your dev account)

1. Download the docset index XML.
2. Find the docset you want (there are some with URL https://apple.com/none.dmg; ignore them - you will find them again further down the file with a working URL).
3. Download the dmg. It's probably around a gigabyte or so.
4. "Install" the .pkg file somewhere on your disk. If you don't trust the installer, do it manually:
   1. Find the largest file, named Payload, and extract it using The Unarchiver.
   2. This creates a new, even larger file, probably named Payload-1.
   3. Extract Payload-1 using The Unarchiver.
5. After many minutes of extracting, we have our .docset file.

erica

/*
 
 Erica Sadun, http://ericasadun.com
 Cross Platform Defines
 
 Apple Platforms Only
 Will update to #if canImport() when available
 
 */

cemolcay

//: Playground - noun: a place where people can play

import UIKit
import SpriteKit
import GameplayKit

enum NoiseTileType: CustomStringConvertible {
  case ocean
  case grass
  case mountain

eladnava

exec > /tmp/${PROJECT_NAME}_archive.log 2>&1

UNIVERSAL_OUTPUTFOLDER=${BUILD_DIR}/${CONFIGURATION}-universal

if [ "true" == ${ALREADYINVOKED:-false} ]
then
echo "RECURSION: Detected, stopping"
else
export ALREADYINVOKED="true"

keighl

@IBAction func fontFaceChanged(sender: NSPopUpButton) {
  let newIDX = sender.indexOfSelectedItem
	if let currentFont = textView?.typingAttributes[NSFontAttributeName] as? NSFont {
		let newFaceName = fontFaceNames[newIDX]          
		if let newFont = NSFontManager.sharedFontManager().convertFont(currentFont, toFace: newFaceName) {
			applyNewAttributes([NSFontAttributeName: newFont])
		}
	}
}

kristopherjohnson

struct LowPassFilterSignal {
    /// Current signal value
    var value: Double
    
    /// A scaling factor in the range 0.0..<1.0 that determines
    /// how resistant the value is to change
    let filterFactor: Double

    /// Update the value, using filterFactor to attenuate changes
    mutating func update(newValue: Double) {