9 Notes In November 2019

1.  Filter both of Alphabet and Numeric.

You may directly use replacingOccurrences (that removes all non-overlapping matches from the input string) with [^A-Za-z0-9]+ pattern:

let str = "_<$abc$>_"
let pattern = "[^A-Za-z0-9]+"
let result = str.replacingOccurrences(of: pattern, with: "", options: [.regularExpression])
print(result) // => abc

link here -> https://stackoverflow.com/a/52052465/8366535
In my case

if let newString = textInput.text {
      let pattern = "[^A-Za-z0-9]+"
      let result = newString.replacingOccurrences(of: pattern, with: "", options: [.regularExpression])
      if result != "" {
         print(result)
 
      }
}

2. Set Image in swift 5.1

 if #available(iOS 13.0, *) {
// Use image by system
     imageview.image = UIImage(systemName: "bolt.slash", withConfiguration: .none)

  } else {
// Use image by custom   
    imageview.image = #imageLiteral(resourceName: "name_icon"
}

3. How to set action after navigate back "backBarButtonItem"

this example for navigation back to set action after back first viewController without use "leftBarButtonItem"
in firstViewControllers :

import UIKit

class FirstViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        
        navigationItem.backBarButtonItem = UIBarButtonItem(title: "", style: .plain, target: self, action: nil)
        
    }
    @IBAction func handleButton(_ sender: Any) {
        navigationController?.pushViewController(EventKitViewController(), animated: true)
    }
    
}

in secondViewController.

import UIKit

class SecondViewController: UIViewController, UINavigationControllerDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()
        navigationController?.delegate = self
    }

    func navigationController(_ navigationController: UINavigationController, didShow viewController: UIViewController, animated: Bool) {
        if viewController.isKind(of:EvenKitViewController.self) {
            print("After Back to first controller you can navigate to another process and set here")
            navigationController.pushViewController(AnimationScanningViewController(), animated: true)
        }
    }
    
}

4. Realm Error "Cannot convert value of type 'Bool' to expected dictionary value type 'String' "


in terminal: pod update 

 //Change update type

from: 

update: true

to :

update: .modified

3.20.0 -> update 4.0.0




5. PropertyWarpper In Swift 5.1
PropertyWarpper introduces in swift 5.1, make your code less than before
source how to use that :

- https://medium.com/better-programming/create-the-perfect-userdefaults-wrapper-using-property-wrapper-42ca76005ac8

- https://medium.com/better-programming/swift-property-delegates-powerful-new-annotations-attributes-system-2e3968b29624

- https://medium.com/better-programming/property-wrappers-in-swift-657bead85501

simple use

//create
@propertyWrapper
struct myProperty {
   private let print = ""

}


//call

@myProperty static var naem: String?

6. GitZip Extention for GitHub 


- Download just for those few dirs/files you need instead of whole project.
- Choose more than one dirs/files.- Just double click on items and click download button.
https://chrome.google.com/webstore/detail/gitzip-for-github/ffabmkklhbepgcgfonabamgnfafbdlkn


7. IOS 13 Does the Apple iPhone 6s have NFC ?
I try to develop NFC use iPhone 6s, but not working, that error because iPhone 6 will never be able to read NFC tags either with or without an App. error in debug area I found.

2019-11-16 15:10:04.396302+0700 100DayOfCode[7504:2523821] 
[CoreNFC] 00000002 83719380 -[NFCNDEFReaderSession beginSession]:318
 error:Error Domain=NFCError Code=202 "Session invalidated unexpectedly" 
UserInfo={NSLocalizedDescription=Session invalidated unexpectedly}, 
errorCode: 0xca

Error reading NFC: Session invalidated unexpectedly

source: https://learn.seritag.com/nfc-enabled-phones/apple-iphone-6s

8. Image system resize swift 5.1(xcode 11), use in TabbatItem and ImageView
Resize use image system in Xcode 11 example:

let scale = UIImage.SymbolConfiguration(pointSize: 12)
let scaleImage = UIImage(systemName: "qrcode.viewfinder", withConfiguration: scale)

// use in tabbar
mid.tabBarItem = UITabBarItem(title: "", image: scaleImage?.withRenderingMode(.alwaysTemplate), tag: 1)


// use in UIImage

imageVIew.image = scaleImage

9. UserDefault use suite

The power of UserDefault in swift, this time example for using group in userDefault make really simple to add object and remove it.
- create group =  UserDefaults.init(suiteName: "name_groups") .
- add object = UserDefaults.init(suiteName: "name_groups").set(Object, forkey: "key") .
- call object = UserDefaults.init(suiteName: "name_groups").object(forkey: "key)" .
- remove single object = UserDefaults.init(suiteName: "name_groups").removeObject(forkey: "key") . 
- remove all object in group = UserDefaults.init(suiteName: "name_groups").removePersistentDomain(forName: "name_group")

import UIKit

struct Default {
    static let suite = UserDefaults.init(suiteName: "groups.luffy.app")
    static let _s = UserDefaults.standard
}

class AddSuiteViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        Default.suite?.set("haha", forKey: "key1")
        Default.suite?.set("wkwkk", forKey: "key2")
        Default.suite?.set("hehehe", forKey: "key3")
        
        Timer.scheduledTimer(withTimeInterval: 5, repeats: true) { _ in
            print(
                  Default.suite?.object(forKey: "key1"),
                  Default.suite?.object(forKey: "key2"),
                  Default.suite?.object(forKey: "key3")
            )
        
            Timer.scheduledTimer(withTimeInterval: 2, repeats: false) { _ in
                Default.suite?.removeObject(forKey: "key1") // remove single object
                Default._s.removePersistentDomain(forName: "groups.luffy.app") // remove all object in group
            }
        }
    }
}

Other sources:
https://medium.com/swift-india/userdefaults-under-the-hood-457461c8d262
https://www.swiftbysundell.com/articles/the-power-of-userdefaults-in-swift/