At WWDC 2019, Apple added a brand new API “UICollectionViewCompositionalLayout” to the UIKit. Using this powerful API, we can create complex compositional layouts without writing complicated code. At times, It feels tough to create complex collection view UIs using the UICollectionViewFlowLayout. The UICollectionViewCompositionalLayout API eases the process and guess what you can even support orthogonal scrolling UIs with much ease. Well, it sounds great, but practically we cannot use the UICollectionViewCompositionalLayout API until we drop the support for iOS 12.0 and earlier in our apps. (It is not going to happen for the next few years is what I predict.) So how do we use this API in iOS 12.0 and earlier?

Apple just released Xcode 11.4 beta with tons of features. One of the notable features is simulating remote push notifications in simulators, which means that triggering remote notifications in simulators is now possible.

We all love closures, don’t we? Closures make an iOS developer’s life easy. Well, if it makes it easy, then why am I saying to avoid using closures in Swift structs? The reason is, “Memory leaks and unexpected behaviors.” Wait. What? Memory leak in structs? How could that be possible?

When we hear the term ‘Sorting,’ the algorithms which come to our mind are quicksort, insertion sort, merge sort, bubble sort, heap sort, and other sorting algorithms. We would have used the method sort() to sort elements in an array, in our day to day programming tasks. However, have you ever wondered what algorithm does the method uses to sort the items in Swift? Before Swift 5, it was ‘Introsort,’ but after Swift 5, it is ‘Timsort.’ Timsort is a sorting algorithm, used in programming languages like Python, and Java. I am going to cover mostly about ‘Timsort’ in this article.

Almost every iOS developer would have had to make a network call from their app. Swift uses URLSession to make network calls. URLSessionTask includes DataTask, UploadTask, DownloadTask, and WebsocketTask (WebsocketTask is lately introduced in iOS13.0 check this article to know more about it.) I was testing a multipart data request API using the [Postman app.]https://www.getpostman.com/ The API worked, the file got uploaded, and the results came in. However, I needed to write the Swift code to make a multipart request from the iOS app. Writing code for data task can be simple, but the complexity increases when we write code for multipart requests. I was wondering whether Postman can generate the multipart data request code for me, turns out that it could!