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Quick 4 steps to get start with Test Flight for iOS

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We can quickly distribute app to a specific set of beta testers over-the-air immediately with Test flight. In the below short note, I listed 4 simple steps to begin with Test Flight.  Step 1:    ’Test Flight’ app needs to be installed in the iPhone device & login to Apple account mail (Previously shared with Developer) in the same. App Store download link Step 2:  Whenever a developer publishes a new build (via iTunes connect panel), All testers will receive an invitation mail from Test Flight. Step 3:   After invitation accepted, Open the test flight app, install test build.  Example for step 2 & 3 ( Image Source : Appcoda) Step 4: Now we can start testing the app. In case any future app build updates, testers will receive notifications. That's all. Hope these steps will help new testers & promises a great quality app in the app store. 
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Built & Released app within 2 weeks

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After successful launch of my last iOS app ,  I wished to make another one  for a different app category. Last time it took me comparatively long time to make highly stable, premium quality UX after much many iterations. Thanks to valuable feedbacks from my peers & social media friends. But this time all I need it in a very short duration. Yes! at the speed of F1 car. Being an F1 fan, I felt heat of upcoming 2019 season a month before it actually begins. I was assured that there are already couple of apps in the App Store which serves the same purpose. Even the official F1 organisation has got own feature rich / futuristic app. So why I am thinking to make my own version which could be a clone... 🤔 Well... the official F1 app is loaded with many great features & uses Unity framework under the hood for live circuits (a state of art feature). All these made heavier (~165MB when installed in my phone) app size to just view race results (if in case!). Couple of...
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Next tide of App market

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  E very time when you rush to Appstore or Playstore, you can see tons of apps. Does every best or top trending app will fit in your smart phone ? Well it does not!. You have to make choice. Yes, the mobile app market is really saturated . There are more than 3 million apps floating across app stores. But average user has only 20-25 apps on his device. Out of these, most of them covers Social Media apps and Productivity tools as well.  The first study , by Nielsen, revealed that the average number of apps that users open on a monthly basis has remained relatively stable over the past two years between 26.5 and 26.8 (although average time spent in apps per month has increased by more than 50% in the same period). Consider a taxi booking app you want to download.  Wave of apps like Uber, Ola, Meru and many more listed in the store. Which one would you choose? One alone or Two apps cannot serve your purpose. For instance you have Ola app installed. U...
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Animating label text update - choosing a better way

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Recently I published a countdown app .  At one point of development - I have to show a timer on a UILabel which ticks on each seconds. As usual I started  setting text to a label object - self .timerLabel.text = someString Easy piece of cake right !?   But wait ... it won't take much user attention when timer ticks on every seconds. So I decided to make use of a simple animation while label gets text update. I found there are dozens of ways to animate a label. In this short article, I listed 3 best way you can animate text on a label. ( Spoiler Alert 👀- I decided to go with 3rd option)  1. Fade In - Fade out animation : CATransition class has got transition type `fade`. With timing function of CATransition - I was able to see the below result. let animation: CATransition = CATransition () animation.timingFunction = CAMediaTimingFunction (name: CAMediaTimingFunctionName .easeInEaseOut) animation.type = CATransitionType .fade animation.subtype = C...
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Implementing autocompletion OTP field in iOS

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Long waiting is over. !!  iOS 12 brings Autofill for OTP text field which is close to Android provided a decade back. Previously in iOS we used to toggle between OTP text screen and message inbox.  Which was hard to remember and time consuming resulting a bad user experience. Personally, I have been asked from the client/customer couple of times to implement autocompletion for OTP field and took me a lot of time to convey that it is not possible in iOS. Why Autofill was not possible previously?  We all know that Apple gives at most care for user privacy. When we see iOS architecture, each individual app is like a separate island. There is no inter-app bridge between apps (exception for Keychain and URLSchemes APIs which gives very limited scope). Thus we cannot read message content from inbox. Where to start Autofilling? First of all, the target SMS need to have the OTP Code with prefix string "Code" or "Passcode"on its message content. Beware of OTP c...
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Cached Async Image in SwiftUI

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 SwiftUI’s AsyncImage is handy, but every time your view appears, it refetches the image—leading to flicker, delays, and unnecessary network use. What if you could fetch once, then reuse instantly? That's exactly what the Cached Async Image  delivers: a memory-powered caching layer that keeps SwiftUI image loading smooth, snappy, and resilient. First a simple in-memory cache without disk persistence. This will be thread-safe and auto-purges under memory pressure. A Singleton wrapping NSCache for URL → UIImage caching as follows : final class ImageCache {   static let shared = ImageCache()   private init() {}   private let cache = NSCache<NSURL, UIImage>()   func image(for url: URL) -> UIImage? {     cache.object(forKey: url as NSURL)   }   func insertImage(_ image: UIImage?, for url: URL) {     guard let image else { return }     cache.setObject(image, forKey: url as NSURL)   }   func clearAll() { ...
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UICollectionViewCell shows with wrong size on First time - Solved

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We commonly use Collection view where its cell size calculated run time. The flow layout delegate is responsible to return individual cell sizes. BUT in most of the cases, delegate method `collectionView: layout sizeForItem:` expects cell size too early. Before generating actual cell size. extension YourViewController : UICollectionViewDelegateFlowLayout { func collectionView ( _ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize { return CGSize (width: externalWidth, height: externalHeight) } } For instance, if a cell size depends on external view and its frame is not yet ready - results with wrong (or outdated) cell size. Typically happens for the first time view controller laid out all views. You can find similar queries in StackOverflow community : Collection view sizeForItemNotWorking UICollectionViewCell content wrong size on first load How to refresh UICollec...
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Prevent Navigationbar or Tabbar overlapping Subview - solved for Card view

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Recently, I started with a Card view added as a subview of UIView in a view-controller. When a view controller created along subviews, it tends to use entire screen bounds and also slips behind Tab bar or Navigation bar. In my current situation, it's second case. Casually new iOS developers will write a patch by additional value for coordinate y and subtracting bar height from its size. A lot of them posted in SO threads too : How to prevent UINavigationBar from covering top of view? View got hidden below UINavigationBar iOS 7 Navigation Bar covers some part of view at Top So, how I got solved ? self.edgesForExtendedLayout = [] This  will avoid all subviews in a view controller get behind any bars. Read full apple  documentation on here. Full Source code below :  //Simple view controller where its view layed-out as a card. class WidgetCardViewController : UIViewController { var containerView = UIView () //MARK:- View Controller Life Cyc...
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