Last active
November 19, 2018 08:47
-
-
Save designablebits/0d4c0e9604d3510dfaafa6ac3712a017 to your computer and use it in GitHub Desktop.
A Collection of code snippets for my reference for iOS project, (UPDATED on regular basis).
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
//MARK: 01 | |
extension UIView { | |
// Using a function since `var image` might conflict with an existing variable | |
// (like on `UIImageView`) | |
func asImage() -> UIImage { | |
if #available(iOS 10.0, *) { | |
let renderer = UIGraphicsImageRenderer(bounds: bounds) | |
return renderer.image { rendererContext in | |
layer.render(in: rendererContext.cgContext) | |
} | |
} else { | |
UIGraphicsBeginImageContext(self.frame.size) | |
self.layer.render(in:UIGraphicsGetCurrentContext()!) | |
let image = UIGraphicsGetImageFromCurrentImageContext() | |
UIGraphicsEndImageContext() | |
return UIImage(cgImage: image!.cgImage!) | |
} | |
} | |
} | |
/* | |
//TODO: Usage | |
let myView = UIView() | |
let myImageFromMyView = graphImage.asImage() | |
*/ | |
//MARK: 01 | |
//TODO: Hide Keyboard when clicked around | |
extension UIViewController { | |
func hideKeyboardWhenTappedAround() { | |
let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(UIViewController.dismissKeyboard)) | |
view.addGestureRecognizer(tap) | |
} | |
func dismissKeyboard() { | |
view.endEditing(true) | |
} | |
} | |
//MARK: 03 | |
//TODO: check if the app launched for the first time | |
extension UIApplication { | |
class func isFirstLaunch() -> Bool { | |
if !NSUserDefaults.standardUserDefaults().boolForKey("HasAtLeastLaunchedOnce") { | |
NSUserDefaults.standardUserDefaults().setBool(true, forKey: "HasAtLeastLaunchedOnce") | |
NSUserDefaults.standardUserDefaults().synchronize() | |
return true | |
} | |
return false | |
} | |
} | |
//TODO: Call it inside appDelegate > didFinishLaunchingWithOptions | |
if UIApplication.isFirstLaunch() { | |
// do something on first launch | |
} else { | |
// go ahead with regular launch | |
} | |
//MARK: 04 / Also check repo iOS App Security for obj-c complete implementation | |
//TODO: Add this inside launchScreenViewController.swift > viewDidLoad() | |
override func viewDidLoad() { | |
super.viewDidLoad() | |
if UIDevice.current.isJailBroken() { | |
let jailbreakVC = JailBrokenViewController() | |
self.navigationController?.present(jailbreakVC, animated: true, completion:nil) | |
} else { | |
//Continue to execute further | |
} | |
} | |
//TODO: Add below as extension | |
extension UIDevice { | |
func isJailBroken() -> Bool { | |
var jailBroken = false | |
let cydiaPath = "/Applications/Cydia.app" | |
let aptPath = "/private/var/lib/apt/" | |
if FileManager.default.fileExists(atPath: cydiaPath) { | |
jailBroken = true | |
} | |
if FileManager.default.fileExists(atPath: aptPath) { | |
jailBroken = true | |
} | |
return jailBroken | |
} | |
} | |
//MARK: 05 | |
//TODO: Add this outside / as a global method to be called | |
func performUIUpdatesOnMain(_ updates: @escaping () -> Void) { | |
DispatchQueue.main.async { | |
updates() | |
} | |
} | |
//TODO: Use it anywhere you want to run things on main thread | |
performUIUpdatesOnMain { | |
//MARK: for example, get use image recieved in data form | |
//self.storyImage.image = UIImage(data: image) | |
} | |
//MARK: 06 | |
//TODO: Resize Image | |
func resizeImage(image: UIImage, newWidth: CGFloat) -> UIImage { | |
let scale = newWidth / image.size.width | |
let newHeight = image.size.height * scale | |
UIGraphicsBeginImageContext(CGSize(width: newWidth, height: newHeight)) | |
image.draw(in: CGRect(x: 0, y: 0,width: newWidth, height: newHeight)) | |
let newImage = UIGraphicsGetImageFromCurrentImageContext() | |
UIGraphicsEndImageContext() | |
return newImage! | |
} | |
func resizeToScreenSize(image: UIImage)->UIImage{ | |
let screenSize = self.view.bounds.size | |
return resizeImage(image: image, newWidth: screenSize.width) | |
} | |
//MARK: 07 |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment