Live Streaming on iOS

In our work, we often need to implement video streaming from iOS devices in real-time or near real-time. A common example is the use of iOS devices as surveillance cameras or creation of streaming applications like Periscope. Problem statement often imposes additional requirements like enabling of stream playback on another device or running the app smoothly in the browser or VLC player, low latency (video streaming in near real-time), low resource consumption (long battery life), no need in a dedicated media server, etc.

Continue reading

Data Syncing in Core Data Based iOS Apps


the-cloud-rainbow-unicorn

In this post, we would like to discuss possible issues that you may face while implementing data syncing in iOS applications, and how you can tackle such issues with various approaches and tools. We are going to approach the issue from different angles, trying to make a generic overview of the topic. Still the main focus for us are applications that have a data model that is sophisticated enough to need a structured database and the Core Data framework.

Continue reading

How to Use UIDynamicAnimator in iOS7 Apps

With the release of iOS 7 developers got empowered by many new tools to make fascinating effects and animations in their apps. However applicability of many of them is still in question. As soon as we made ourselves familiar with them, in our new project we decided to make a new animation, similar to that used by Apple in Messages. Continue reading

Blur Effect in iOS Applications

For any iOS application, interface appearance is a key driver to success. Sleek and elaborate design combined with impressive look and feel of your app, can enhance user experience and add points in favor of your application in the App Store.

How can you best impress the user? Nice appearance can be achieved in many ways, one of them is to apply effects on different parts of the interface and the image as a whole. Among all these, perhaps the most commonly used effect is Blur, and we are going to discuss it in this post. We will tell you how to apply Blur using different frameworks, and also we will experiment a little to benchmark performance of different methods. Continue reading

Pitfalls in Large-Scale Application Development on Node.js

It has become clear that Node.js has become a striking trend in the community of Web developers. In this post, we are going to discuss, what pitfalls may encroach on the developer in Node.js, and whether it is worth switching to it.

Basically, developers associate Node.js with small services, e.g., chats. (For more details, read "Development of high-performance services for Node.js"). Well, they have a good reason for that. Node.js is a perfect fit for services that support a permanent connection to the client or can wait for a response for a long time. Absence of I/O lock allows you to read large files, keeping your service ready to process new requests. Continue reading

Best Practices for Server and Application Interaction

iOS Best Practices

In this modern era of growth and development of mobile applications, enabling of efficient client-server interaction is gaining more importance. In this context, the following factors are critical: flexibility, scalability, documenting, support for older API versions, and caching. In this post, we are going to discuss the most important aspects of service development and design that will help you attain better results. Continue reading

Workflow and Frontend Development Tools

Sooner or later, all developers come to selecting tools best-fitting their needs. Choosing of proper tools can significantly boost development efficiency and improve code quality. In this post, we are going to describe tools we use to create the frontend of our projects and enable the coding workflow. Continue reading

AirPlay and HDMI

If you develop gaming or multimedia applications for iOS, then AirPlay is absolutely a must for you, almost a standard. Indeed, what could be better for a user than watching favorite videos or photos on a big screen of a plasma TV or playing advanced games using iPhone/iPad/iPod as a multi-touch joystick? AirPlay has been designed specifically for this purpose. Continue reading

How to develop highload services on Node.js

In this post, we are going to focus on developing based on a relatively new technology, Node.js. It is rapidly gaining in popularity, and not unreasonably. Node.js allows you to implement faster Web services capable to hold extreme load, which is critical to video service projects. For example, in Node.js you can easily build real-time statistics collectors , large-scale chats, etc. Of course, services written in C++ have a higher performance margin, but are too costly to implement. On the contrary, Node.js allows you to quickly create complex systems. In this post, we will use Node.js to build a simple application that can hold very high load. Continue reading