How to use Binding in SwiftUI
@State and @ObservedObject are used to declare the source of truth.
My Dev Notes
Figuring out software, one rabbit hole at a time.
Archive
Page 6 of 19How to Add a Local Swift Package
WWDC 2019 Session 410 covered how you can create your own library. In the video you’ll see how the package is a folder that can be dragged around, and that once it is in a git r...
How to Use Preference
Preference is the way to pass data from children to parent.
How to use Environment and EnvironmentObject
Environment is a very powerful way to pass data from parent down to children.
How to Layout in SwiftUI?
SwiftUI changes everything, again.
Getting Started With SwiftUI
I am getting started with SwiftUI, and there’s so much to learn, all over again.
Pitfall: URL for Local Files
URL is a very common data structure, and can be used for http, file, and other schema.
Bet You Didn't Know: You Don't Need 5.5 Inch Screenshots for App Store
The App Store screenshots specification (as of Feb 2020) states that you need at least these two sizes:
iOS Conf SG 2020 Videos
Videos from iOS Conf SG 2020 are now available on YouTube.
Comment: Omh's Day in the Life of an iOS Developer
I received the following push notification from ohmyhome, a Singapore PropTech startup.
Singapore Is Now Collecting GST From App Store
As a Singapore developer, I recently receive an email from Apple on the new GST law on digital goods & services.
Guide to Property Wrapper
With SE-0258, Swift 5.1 adds a new syntactic sugar.
Supporting Dark Mode in iOS 13
WWDC 2019 gave us Dark Mode. NSHipster has once again provided a complete guide, with a helpful grouping of the new semantic colors.
A Very Short Guide to rvm
rvm is a necessary tool to run different version of ruby.
This Is How You Force iPhone to Power Off if It Get Stuck
When I say stuck, I mean really stuck – when pressing the side button and volume button does NOT even work.
Migrating App Engine to Go 1.12
I was working one of those dreadful migration task today.
Info.plist for a macOS Command Line App
After upgrading to Catalina, one of my favorite tool broke.
Guide to Submitting Promotional Artwork to App Store Connect
99% of my emails that comes from App Store Connect is nothing good, because they are often rejections.
Apple Search Ads Can Be Very Dumb
After launching Dualgram, I give Apple Search Ads a try.
I'm Not Surprise With App Store Review Rejections Anymore
I was developing a new iOS-13-only app and submitted it one week before Sep 19 – the D-day when iOS 13 is bestowed to all.
Shortcuts & GM Seed
I have kept a secret from my wife. I use some shortcuts when I text her, since 10 years ago.
How to Rotate Only Selected Views (like Camera app)
Camera app has an interesting behavior – When you rotate from portrait to landscape, only some buttons will rotate, while the camera preview layer and texts do not.
Setup SceneDelegate Without Storyboard
New in iOS 13, multi-windows app requires UIWindowSceneDelegate.
Catalina Beta Bug: Deleting Files Did Not Free Up Disk Space!
I was on macOS 10.15 Catalina BETA 1, and I encountered a very troubling bug.
How to Generate PDF With Images
To create PDF, one of the most popular way is to create the HTML, then convert it to a PDF.
Using URLSession for simple HTTP GET & POST
Since URLSession was introduced in iOS 7, third party libraries have somehow lesser value.
How to Enable Sidecar for the Unsupported Macbooks
macOS 10.15 Catalina (still beta) now supports running a secondary display using an iPad!
Mac Tips: Using Finder to Rename Multiple Files, Etc
I often need to rename multiple files eg. screenshots generated from UI Testing, or my personal photos. I often need to resize images eg. for screenshots on my blogs.
How to Animate Auto Layout Constraints (2019)
I have a 2014 post in Objective-C, and quite a bit has changed since then. We now have Swift 5, and layout anchors (a short introduction below).
Try the New Brave Browser with Built-in Ad Blocker
I have been using this new web browser and would love to share it with you.