9 Notes March 2021

1. Notification Center willResignActiveNotification call multiple times

When using notification center set in interactor init class (module fullscreen)I get multiple call willResignActiveNotification

because of that module I've used more than one navigation

Solution:

Move notification center from interactor to viewController

before (Interactor)

 init() {

NotificationCenter.default.addObserver(self, selector: #selector(handleApplicationDidEnterBackground(_:)), name: UIApplication.willResignActiveNotification, object: nil)
        
 }


 @objc internal func handleApplicationDidEnterBackground(_ aNotification: Notification) {
        self.proses()
    }

After (viewController)

 override func viewDidLoad() {
        super.viewDidLoad()
        NotificationCenter.default.addObserver(self, selector: #selector(handleApplicationDidEnterBackground(_:)), name: UIApplication.willResignActiveNotification, object: nil)
}
override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        NotificationCenter.default.removeObserver(self, name: UIApplication.willResignActiveNotification, object: nil)
    }

 @objc internal func handleApplicationDidEnterBackground(_ aNotification: Notification) {
        self.interactor?.prosess()
    }

Source: https://stackoverflow.com/a/61710674/8366535

2. Get data  LPMetadataProvider 

When I need data from LPMedataProvider 

import LinkPresentation


let url = URL(string: "###URL HERE")
let metadataProvider = LPMetadataProvider()
metadataProvider.startFetchingMetadata(for: url) { (metaData, error) in
    if let error = error {
        print(error)
        
    } else if let metaData = metaData {
        print(metaData)
        let desc = metaData.dictionaryWithValues(forKeys: ["_summary"]).description
        let title = metaData.title
    }
}

3.  Navigation Present Not Fullscreen in IOS 14 +

### View controller  (1)
### set in button action

let vc = PopupInfoViewController()
vc.modalTransitionStyle = .coverVertical
vc.modalPresentationStyle = .overFullScreen
self.present(vc, animated: true, completion: nil)

### View controller  (2)
### set in viewDidLoad or viewWillAppear

DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
    UIView.animate(withDuration: 1) {
        self.view.backgroundColor = UIColor.black.withAlphaComponent(0.5)
    }
}

### set in viewWillDisappear

self.view.backgroundColor = UIColor.clear

4.  Add Unit Test to Existing Project 

File -> New -> Target -> Test ->  Unit Testing bundle 
and select your project

source: https://stackoverflow.com/a/34793806/8366535

5.  Swiftlint always show Trailing Whitespace Violation

for fixing you can run in terminal this code

$ swiftlint autocorrect

autocorrect work for me

source: https://stackoverflow.com/a/57051011/8366535

6. Round Int

I want to round multiple $50.000/ ticket

let amount = 60000
let rounded = amount/50000 * 1
print("You get \(rounded) " + "ticket(s)") //You get 1 ticket(s)

7. Underline for UILabel (learn more)

just underline for UILabel, without any custom ui

let underlineAttribute = [NSAttributedString.Key.underlineStyle: NSUnderlineStyle.thick.rawValue]
        let underlineAttributedString = NSAttributedString(string: "StringWithUnderLine", attributes: underlineAttribute)
        labelLearnMore.attributedText = underlineAttributedString

source: https://stackoverflow.com/a/28053652/8366535

8. Button in table cell can't tap

- check if the button isEnable in UI or you can set it by code
- check if button isUserInteractionEnable
- check button delegate

programmatically set active button

button.isEnable = true
button.isUserInteractionEnabled = true

9.  Error Jenkins CompileSwift normal arm64 

When I've build failure in jenkins I got this error

----------------------------------------------------------------------------------------------------------------

** ARCHIVE FAILED **

.

.

.

/Volumes/Data/jenkins/workspace/xxx/xxxxx_build/xxxx/Apps/Modules/General/Popup/Dialog/DxxxViewController.swift:746:39: cannot convert value of type '() -> ()' to expected argument type '((Bool) -> Void)?'
.

.

The following build commands failed:

CompileSwift normal arm64 /Volumes/Data/jenkins/workspace/xxxx/xxxxx_build/xxxxxxx/Apps/Modules/General/Popup/Dialog/DxxxxViewController.swift

CompileSwiftSources normal arm64 com.apple.xcode.tools.swift.compiler

(2 failures)

[10:39:32]: Exit status: 65

----------------------------------------------------------------------------------------------------------------

Solution is:
use completion to action call dialog again, don’t call dialog in same class

Note:
Because in jenkins xcode version not update / xcode version higher than setup xcode version in jenkins