iOS-Blog

The home of Objective-C Tutorials, Resources and Competitions for the iPhone Developer

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How to Add Caching to Cloud Functions in Parse

is a popular backend-as-a-service () that essentially gives developers a virtual database and app server in the cloud. You can create a “cloud code endpoint” with a unique name that accepts any number of parameters. This endpoint can then be invoked by the mobile SDK, and a response returned. This response can consist of any number of data objects. For standard database queries, this SDK comes with an additional powerful feature: client-side caching. However, the Parse mobile SDK does not ...

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Creating a Custom Rotation Gesture Recognizer for iOS Apps

Any developer with aspirations of creating a killer app will almost certainly expand the UI beyond the standard offerings provided by Apple. While the standard API is functional and fairly complete, the intense competition in the App Store requires the user experience (UX) to be exceptional, highly attractive, and immediately intuitive. Even with beautiful graphics, the touch interface needs to be flawless and instinctive, which often times requires extending the standard touch gestures. The standard Apple API class UIGestureRecognizer supports ...

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How to Accept Multiple Enum Values in a Property or Method

Every iOS developer has probably come across a property or method in an API that accepts multiple enum values at once, separated by a vertical pipe. How does that work, and how can we do the same?

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Storing Data with NSUserDefaults

How can you store data between application launches? There are plenty of ways, but here I will show you the simplest, NSUserDefaults.

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Set a background image in your iOS Application

This is a quick iOS Development tip that will show you two different ways that you can set the background image of you application

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NSDictionary – Objective-C Class Reference

Have you had a collection of objects that you want to by name? Lets say you had an object that contains contact info for a person. If I wanted to see the contact information for somebody, I’d want to just tell something, “Hey, give me Jimmy’s contact info”, and it would get it for me. That is exactly what NSDictionary does for you. NSDictionary is way to perform easy lookups for objects stored in the dictionary, via a key of ...

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Objective-C: Validate e-mail address

This Quick iOS Development tip is a piece of code that I use regularly to validate an email address.

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Objective-C: Property Attribute Reference Guide

This tutorial is intended to be a reference guide to the property attributes found in the iOS development programming language Objective-C.

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