KrisYu

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

import UIKit

let a = #imageLiteral(resourceName: "hot.png")

func createPDF(image: UIImage) -> NSData? {
 
    let pdfData = NSMutableData()
    let pdfConsumer = CGDataConsumer(data: pdfData as CFMutableData)!

KrisYu

import Cocoa
let a = #imageLiteral(resourceName: "hot.png")

extension NSImage {
    var toCGImage: CGImage {
        var imageRect = NSRect(x: 0, y: 0, width: size.width, height: size.height)
        guard let image =  cgImage(forProposedRect: &imageRect, context: nil, hints: nil) else {
            abort()
        }
        return image

KrisYu

import Cocoa


class LogFile {
    
    static var logPath: String? {
        get {
            let paths = NSSearchPathForDirectoriesInDomains(.applicationSupportDirectory,
                                                            .userDomainMask,
                                                            true)

KrisYu

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

import Cocoa

public func caputreRegion(toURL fileUrl: URL) -> URL {
    
    let fileUrlPath = fileUrl.path
    
    let task = Process()
    task.launchPath = "/usr/sbin/screencapture"

KrisYu

// plain write to image
@discardableResult func writeCGImage(_ image: CGImage, to destinationURL: URL) -> Bool {
    guard let destination = CGImageDestinationCreateWithURL(destinationURL as CFURL, kUTTypePNG, 1, nil) else { return false }
    CGImageDestinationAddImage(destination, image, nil)
    return CGImageDestinationFinalize(destination)
}


// There's a panel, save image png

KrisYu

import UIKit

extension UIImage {

    subscript (x: Int, y: Int) -> UIColor? {

        if x < 0 || x > Int(size.width) || y < 0 || y > Int(size.height) {
            return nil
        }

KrisYu

class Person: NSObject, NSCoding {
    
    
    var firstName: String
    var lastName: String
    
    override var description: String {
        return self.firstName + " " + self.lastName
    }
    

KrisYu

struct Person: Codable {
    
    var firstName: String
    var lastName: String
    
    var name: Data? {
        return try? PropertyListEncoder().encode(self)
    }
    

KrisYu

class Person: NSObject, Codable {
    
    
    var firstName: String
    var lastName: String
    
    override var description: String {
        return self.firstName + " " + self.lastName
    }

KrisYu

//
//  HorizontalScrollerView.swift
//  RWBlueLibrary
//
//  Created by Xue Yu on 2/4/18.
//  Copyright © 2018 Razeware LLC. All rights reserved.
//

import UIKit
// 把 DataSource 和 Delegate 协议分开，这样更优雅，并且可以减少不必要的 @objc 的使用