iOS

iOS, Objective-C, Swift, Programmatic layout, Xcode 10, Xcode 11

iOS - Creating Programmatic Layout without using Storyboard (Swift/Objective-C)

There are two ways of creating layout on iOS. First, using readymade storyboard provided by Xcode when you create a new project. And second, by manually creating a UIViewController subclass and assigning it

iOS, Swift, Xcode 10.1, Xcode, Drag and Drop, DragDrop, Postmates, Interview Questions, Interview

Drag and Drop on iOS using Swift

Hello folks, it's been a while since I wrote my last article. Today we're going to learn how to implement drag and drop feature on iOS using Swift. To see in advance what

Swift, iOS, Codable, Swift 4.0, Encodable, Decodable, Swift 4.1

Using Codable Protocol in Swift 4.1

Swift 4 Codable protocol to decode and encode json data and model objects. Explained with examples.

UITableView, Swift, iOS

Add headers and footers to tableview sections

In the previous post, we saw how to add header and footer views to entire table view. In this post, we will see how to add header and footers to individual UITableView sectionsBefore

yyyy, DateFormatter, iOS, Gotchas, Tricks, Swift, Foundation

Challenges of DateFormatters

Working with DateFormatters is tough - At least on iOS. Today I will show with an example how I shot myself in the foot while working with simple DateFormatters problem. Here's the problem

iOS, user experience, UX, user friendly, Apps Release, Mobile Device, Mobile apps, iPhone 5s

Making user friendly mobile apps

We all love using apps, don't we? They are great utility and ubiquitous after the propagation of smartphones all around us. However, as I do and I am sure lots of other people

iOS, Swift, Xcode, Metadata, plist

How to get the iOS App Metadata in Swift

Working on a new app could be exciting. However, there are certain things or information which you might want to get as a part of the core feature. One of them is the

Swift, Memory Leak, Memory, weakify, unowned, retain cycle, KrakenDev, StackOverflow, iOS, Xcode, App Development, iOS Developer

When to weakify

Today I am going to talk about one of the discussion prone topics on iOS platforms. Detecting memory leaks and when to apply weakify. The topic came up while I was recently performing

Swift, Swift 4.1, Closure, Closures, Memory Leak, Memory, iOS, Apple

Swift - Fighting memory leaks in closures

Swift is a great language. In fact, it's among my top 3 favorite languages. It is quite strict in terms of discipline and best practices which pay off in the long-term to offer

Regular Expressions, Swift 3.0, iOS, Swift 4.0, RegEx, Example, Demo

Regular Expressions in Swift and iOS

I didn't actually plan on writing this post. However, things didn't go as I expected them to go. Today I was helping someone with Regular Expression which I thought was my forte and

Swift, Xcode 9, Xcode, Closure, Closures, iOS, Example, Demo

Closure Trick in Swift

Today I learned a closure trick in Swift. Usually when expression is assigned to a variable on left, it is evaluated instantly. For example, let value = complexCalculation() func complexCalculation() -> String { return

iOS, Swift 4.0, String, Multi-line support, Multi-line, Xcode 9, Strings

Swift 4 - Multiline string literals support

Multi-line support in Swift 4. Now add multi line support with double quotes using Swift 4 and Xcode 9. Tutorial with example on adding support.

UIKit, iOS, Swift 3.0, Tutorial, Tips, UILabel, AutoLayout, Dynamic, Resize, Dynamic height, Dynamic width

Using Autolayout to Dynamically Resize UILabel

We all love Autolayout, don't we? I had a less than ideal experience with it when I started. However, after continuous practice and reading a Book - iOS Auto Layout Demystified I got

iOS, Swift 3.0, VIPER, Architectures, iOS Architectures, Example, Examples, Github

Writing an app with VIPER architecture - Part 2

I have written a part 1 of writing an iOS app using VIPER architecture. This covers fundamentals and basic example of using VIPER, creating models, entities and utilizing them in the app. This

iOS, iOS Architectures, Architectures, VIPER, Examples, Example

Writing an app with VIPER architecture - Part 1

Last week I came across one of the many awesome frameworks on iOS. Having recently worked with MVVM and MVC, I was bit hesitant to learn VIPER, since more frameworks you learn, there

MVVM, iOS, Swift, Swift 3.0, Xcode, VIPER, Architectures, iOS Architectures

Comparing VIPER vs. MVVM

Recently I started playing with VIPER architecture. Although I was quite hesitant trying it out, it turns out it's not all that bad as I expected. It'e certainly better than traditional MVC iOS

Facebook, Pride Effect, Library, Open Source, Github, iOS, iOS10, Objective-C, Example, Demo, Demos, Rainbow

An iOS library to apply Pride Effect

A Library to apply Facebook style pride parade effect to photos With the ongoing LGBT pride month, it reminds me of the pride effect I created a couple of years back. My original

iOS, Interview, Questions, Interview Questions, Technical Question, Swift 3.0, Objective-C, Development, Senior, Principal, Checklist, New Job

List of Interview Questions for iOS Developers

Over the years of iOS development has taught me some interesting facts about Objective-C and Swift. Some of them I learned from my own experience and most of them either from senior colleagues

iOS, iOS10, Wrapper, Github, Open Source, API, Apple, Tutorial, Tips, Swift 3.0, 3D Touch

Wrapper for 3D touch preview implementation using Swift 3.0

It's been a while since I started working on 3D touch implementation on iOS 6s Plus devices. Luckily, even through it's a hardware feature iOS simulators still supports simulation of 3D touch of

iOS10, Apple, Tutorial, Example, iOS, Database, Core Data, Caching, Cache, Swift 2.0, Swift 2.3, Mantle, Adapter, MTLManagedObjectAdapter

Core Data with Mantle in Swift

Today we are going to talk about how I used Core data in conjunction with Mantle wrapper to directly store and retrieve data out of database without directly interacting with Core data. This

iOS, JavaScript, Swift, UIWebView, Swift 3.0, Callback, delegate

iOS - Communication from Javascript to iOS

This is the second part of two series article. You have already read the first part which shows how to transfer data from iOS to JavaScript. In this part we will see how

JavaScript, Web page, UIWebView, Swift 3.0, iOS, InterApp

iOS - Communication from iOS to JavaScript

This is the first part of a series about communication between iOS and JavaScript. In this part we will see How to call JavaScript functions from iOS How to get return value of

iOS, Xcode 8.2, 3D Touch, iPhone6s, iPhone6s Plus, Touch, Example

Lessons learned from 3D touch demo

This weekend I spent significant amount of time working on the previously inactive 3D touch demo project. I added few tweaks, made little experiments and removed extraneous code from the repository. Below are

iOS, Swift 3.0, Xcode 8.2.1, Xcode 8.2, Custom Operators, Advanced Swift, Tutorial, Swift, Infix, Postfix, Prefix, Generics, Operators

Custom Operators in Swift with Generics

Swift introduced us a new era of custom operators. Unlike Objective-C, it will allow us to define our own operators and perform operator overloading if necessary. Although I haven't come across such use

iOS, Swift 3.0, Xcode, iOS10, UIKit, Github, Demo, Tips, Example, Crater, Hole, UIView, CALayer

Making a crater in UIView with CALayer

Although title sounds horrible, believe me - It's not that bad. This is a trick I learned from StackOverflow post. Although seemingly innocuous, it took me a while to figure out given the