Categories : All, Case Study, Retail / E-commerce
Client is a leading construction company that required a Quality and Control iPhone application to maintain transparency across geographically diverse offices. This application helps diversely located offices to work in sync with each other, track progress and lend a helping hand. Each field inspector is assigned to each office for tracking the progress of the tasks and its checkpoints and act according to the status.
This application helps the company to enhance team abilities and deliver every piece of work as per the schedule. The application was expected to be extremely user-friendly and capable of handling multiple requests at a time. The Application manages the schedule & identifies non-compliant constructions.
Development Tools & EnvironmentsXcode 4.2.1, SQLite Framework, Objective C, Core Data Framework, iOS SDK 5.0, MVC etc.DatabaseSQL Lite Database Server, DB Clustering, DB Optimization, Master Slave Replication, Query Optimization, Scheduler for Backups
|Ope rating System & Server Management||iOS, Multi-Server Architecture with Staging & Production Environment through Version Controlling releases, Server Optimization, Security & SSL Implementation, Scheduler for Back-ups, Alert Monitoring System Integration, Server Performance Tuning at regular intervals, Software Firewall Configuration & Maintenance|
|Quality Assurance Testers||1|
The application life cycle constitutes the sequence of events that occurs between the launch and termination of your application. In iPhone/iPad OS, the user launches the application by tapping its icon on the Home screen. Shortly after the tap occurs, the system displays some transitional graphics and proceeds to launch your application by calling its main function. From this point on, the bulk of the initialization work is handed over to UIKit, which loads the application’s user interface and readies its event loop. During the event loop, UIKit coordinates the delivery of events to your custom objects and responds to commands issued by your application. When the user performs an action that would cause your application to quit, UIKit notifies your application and begins the termination process.
The following figure depicts the simplified life cycle of an iPhone application. This diagram shows the sequence of events ts that occur from the time the application starts up to the time it quits. At initialization and termination, UIKit sends specific messages to the application’s delegate object to let it know what is happening. During the event loop, UIKit dispatches events to your application’s custom event handlers.
After the UIApplication main function initializes the application, it starts the infrastructure needed to manage the application’s event and drawing cycle, which is depicted in the following figure. As the user interacts with a device, iPhone/iPad OS detects detects touch events and places them in the application’s event queue. The event-handling event handling infrastructure of the UIApplication object takes each event off the top of this queue and delivers it to the object that best suited to handle it. For example, a touch event occurring in a button would be delivered to the corresponding button object. Events can also be delivered to controller objects and other objects indirectly responsible for handling touch events in the application.
In the iPhone OS Multi-Touch Touch event model, touch data is encapsulated in a single event object(UIEvent).To track individual touches, the event object contains touch objects (UITouch),one for each finger that is touching the screen. As the user places fingers on the screen, moves them around, and finally removes them from the screen, the system reports the changes for each finger in the corresponding touch object.
When it launches an application, the system creates both a process and a single thread for that application. This initial thread becomes the application’s main thread and is where the UIApplication object sets up the main run loop and configures the application’s event-handling event handling code. Figure shows the relationship of the event-handling handling code to the main run loop. Touch events sent by the system are queued until they can be processed by the application’s main run loop.
The MVC Architecture is a combination of Model-View-Controller.
1. Model: The model object knows about all the data that need to be displayed. It is model who is aware about all the operations that can be applied to transform that object. It only represents the data of an application. The model represents enterprise data and the business rules that govern access to and updates of this data. Model is not aware about the presentation data and how that data will be displayed to the browser.
2. View:The view represents the presentation of the application. The view object refers to the model. It uses the query methods of the model to obtain the contents and renders it. The view is not dependent on the application logic. It remains same if there is any modification in the business logic. In other words, we can say that it is the responsibility of the view’s to maintain the consistency in its presentation when the model changes.
3. Controller: Whenever the user sends a request for something then it always go through the controller. The controller is responsible for intercepting the requests from view and passes it to the model for the appropriate action. After the action has been taken on the data, the controller is responsible for directing the appropriate view to the user. In GUIs, the views and the controllers often work very closely together.
This application for iPhone is built around objective C and core data framework. The design for each screen is implemented using the storyboard framework, which is newly integrated for iOS 5.0. This application was also made compatible to iOS sdk 5.1 at a later stage. Almost all the modules are developed using foundation, core graphics and UIKIT frameworks. All the user interface items are placed in view controllers and are linked with the controller files project along with the outlets, actions of the UI element. Geo-fencing technology was used at many stages. Core data framework is used to maintain and store all the details across the project scope. The site was developed and fully functional within a span of 3 months.