Swift Discovery

How to make simple networking client in Swift

Issue #222

For more mature networking, visit https://github.com/onmyway133/Miami

final class NetworkClient {
    let session: URLSession
    let baseUrl: URL

    init(session: URLSession = .shared, baseUrl: URL) {
        self.session = session …

Written by

Khoa Pham

How to ignore App Transport Security in iOS

Issue #221

Ignore a host

<key>NSAppTransportSecurity</key>
<dict>
    <key>NSExceptionDomains</key>
    <dict>
        <key>example.com</key>
        <dict>
            <key> …

Written by

Khoa Pham

How to run simple http server in Go

Issue #220

Handle url parameter

package main

import (
  "net/http"
  "log"
)

func handleGreeting(w http.ResponseWriter, r *http.Request) {
  messages, ok := r.URL.Query()["message"]
    
  if !ok || len(messages[0]) < 1 { …

Written by

Khoa Pham

How to use Stripe and Apple Pay in iOS

Issue #219

• iOS Integration
• Setting Up Apple Pay Requirements
• Apple Pay

Show basic add card in iOS

import UIKit
import Stripe

final class MainController: UIViewController {

    func showPayment() {
        let addCardViewController = …

Written by

Khoa Pham

How to test PublishSubject in RxSwift

Issue #218

• RxBlocking does not work with Variable and PublishSubject, see https://github.com/ReactiveX/RxSwift/blob/0b66f666ba6955a51cba1ad530311b030fa4db9c/Tests/RxSwiftTests/Observable%2BSubscriptionTest.swift#L165

Use homemade Recorder

class …

Written by

Khoa Pham

How to fix not found zlib problem in macOS Mojave

Issue #217

https://developer.apple.com/documentation/xcode_release_notes/xcode_10_release_notes

The command line tools will search the SDK for system headers by default. However, some software may fail to build correctly against the SDK and require …

Written by

Khoa Pham

How to use Sonarqube in Swift projects

Issue #216

Install Sonarqube

https://docs.sonarqube.org/latest/setup/get-started-2-minutes/

• Download Sonarqube for macOS https://www.sonarqube.org/downloads/
• Put it in ~/sonarqube
• Run localhost server ~/sonarqube/bin/macosx-universal-64/sonar.sh …

Written by

Khoa Pham

What is Personal team in Xcode

Issue #215

https://developer.apple.com/library/archive/qa/qa1915/_index.html

Xcode 7 and Xcode 8 allow you to select the free personal team provided with your Apple ID for signing your app. This team allows you to build apps for your personal use on …

Written by

Khoa Pham

How to map from Swift 5 Resul to RxSwift PublishSubject

Issue #214

extension Result {
    func to(subject: PublishSubject<Success>) {
        switch self {
        case .success(let value):
            subject.onNext(value)
        case .failure(let error):
            subject.onError(error) …

Written by

Khoa Pham

How to update NSMenuItem while NSMenu is showing in macOS

Issue #213

Use Runloop

timer = Timer.scheduledTimer(withTimeInterval: 1, repeats: true, block: { [weak self] _ in
    let date = Date()
    self?.updateStopItem(seconds: finishDate.timeIntervalSince1970 - date.timeIntervalSince1970)
}) …

Written by

Khoa Pham

How to use Timer in Swift

Issue #212

Pre iOS 10

func schedule() {
    DispatchQueue.main.async {
      self.timer = Timer.scheduledTimer(timeInterval: 20, target: self,
                                   selector: #selector(self.timerDidFire(timer:)), userInfo: nil, repeats: …

Written by

Khoa Pham

How to overload functions in Swift

Issue #211

Function

Functions in Swift are distinguishable by

• parameter label
• parameter type
• return type

so that these are all valid, and works for subscript as well

struct A {

  // return type
  func get() -> String { return "" } …

Written by

Khoa Pham

Understanding AVFoundation and MediaPlayer frameworks in iOS

Issue #210

Depending on what features we want to achieve, we need to go with either AVFoundation or MediaPlayer framework. As someone who worked with many apps that involve media playback, here are some of my observations

MPMoviePlayerController vs …

Written by

Khoa Pham

How to handle reachability in iOS

Issue #209

Here are what I learn about reachability handling in iOS, aka checking for internet connection. Hope you will find it useful, too.

This post starts with techniques from Objective age, but many of the concepts still hold true

The naive way …

Written by

Khoa Pham

Dealing with CSS responsiveness in Wordpress

Issue #208

During the alpha test of LearnTalks, some of my friends reported that the screen is completely blank in the search page, and this happened in mobile only. This article is how I identify the problem and found a workaround for the issue, it …

Written by

Khoa Pham

How to build with xcodebuild and automatic code signing

Issue #207

Team ID

Error

Message: "xcodebuild: error: invalid option '-teamID'

Use =

xcodebuild teamID=T78DK947F3

Does not work 😢

DEVELOPMENT_TEAM

https://pewpewthespells.com/blog/migrating_code_signing.html

xcodebuild DEVELOPMENT_TEAM= …

Written by

Khoa Pham

How to launch app at start up in macOS

Issue #205

ServiceManagement framework

https://developer.apple.com/documentation/servicemanagement/1501557-smloginitemsetenabled

SMLoginItemSetEnabled

Enable a helper application located in the main application bundle’s “Contents/Library/LoginItems” …

Written by

Khoa Pham

How to fix mismatched deployment between app and test target in Xcode

Issue #204

• My macOS app target has deployment target 10.12, but when running test, I get

Compiling for OS X 10.11, but module 'MyApp' has a minimum deployment target of OS X 10.12: …

Written by

Khoa Pham

How to notarize macOS app

Issue #203

New Notarization Requirements

https://developer.apple.com/news/?id=04102019a

With the public release of macOS 10.14.5, we require that all developers creating a Developer ID certificate for the first time notarize their apps, and that all …

Written by

Khoa Pham

How to resize image using imagemagick

Issue #202

mogrify -resize 1280x800 s2.png

Written by

Khoa Pham