Issue #39
Hi there,
Welcome to issue #39, the last one in 2022. I wish you wonderful holidays, and see you on January 5 👋
Supporting webp images with PHPicker
Are you using PHPickerViewController for photo library imports, and access images using loadObject(ofClass:)? It turns out, this method doesn't support some image formats, such as webp images. You can use loadDataRepresentation(forTypeIdentifier: "public.image", completionHandler:) instead.
Equality vs Identity
How is === different from == ?=== checks if it's the same instance, and is available only for classes. But why do we almost never have to use it?
All NSObjects ( UIView , UIViewControllers, etc) get a default Equatable conformance that uses Objective-C's isEqual: , which in turn compares instances, like === would. So when writing checks like if sender == myButton, we actually mean ===, but can save one character thanks to Swift's interoperability with Objective-C.
Swift gives us two equality operators, == and ===
— Viktoria Likhotkina (@viktoriia_li) December 14, 2022
== tests that two things are equal like 5 == 5
=== is the identity operator, which checks whether two instances of a class point to the same memory#ios #swift #iosdevbasics #iosdevelopment #iosdev #iosdevs #iosdevelopers
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More formatter coolness
I can't stop being amazed by all the different features available in formatters out of the box:
I didn't know, there is a possibility to set a custom positive prefix to a number formatter...🤯 Very handy!#stillLearning #swift #iosDev pic.twitter.com/Her1zsL1ca
— Pavel Zak (@myridiphis) November 30, 2022
Readable large numbers
We can arbitrarily add _'s inside any type of number literal - integers, floats or even hex numbers:
Vincent Pradeilles
My top 5 tips
I teamed up with Vincent to record a 20 min. video where I share my top tips to improve your Swift code. Some of them have been featured in the newsletter earlier, but some have not:
- Avoiding Retain Cycles with Combine or RxSwift
- Typesafe Identifiers
- Managing Complex UI States
- Never Forget to Call a Completion Handler
- Simplifying UI Code with Layout Margins
- Typesafe Strings and Images
If you haven't seen the video yet, do check it out ☺️
✌️
Alright, that's it for today! Thank you to Codelime for sponsoring this issue.
I'm curious if you found one of the tips particulary interesting - let me know by replying to this email!
Happy holidays 🕎🎄