You have a great idea for an app, but where do you begin? Objective-C is the universal language of iPhone, iPad, and Mac apps, and Objective-C for Absolute Beginners, Second Edition starts you on the ...path to mastering this language and its latest release. Using a hands-on approach, you'll learn how to think in programming terms, how to use Objective-C to construct program logic, and how to synthesize it all into working apps. Gary Bennett, an experienced app developer and trainer, will guide you on your journey to becoming a successful app developer. If you're looking to take the first step towards App Store success, Objective-C for Absolute Beginners is the place to start.
Smalltalk in a C world Chisnall, David
Science of computer programming,
12/2014, Letnik:
96
Journal Article
Recenzirano
Odprti dostop
A modern developer is presented with a continuum of choices of programming languages, ranging from assembly languages and C up to high-level domain-specific languages. It is very rare for a single ...language to be the best possible choice for everything, and the sweet spot with an optimal trade between ease of development and performance changes depending on the target platform.
We present an interoperable framework for allowing code written in C (potentially with inline assembly), Objective-C, Smalltalk, and higher-level domain-specific languages to coexist with very low cognitive or performance overhead. Our implementation shares an underlying object model, in interpreted, JIT-compiled and statically compiled code among all languages, allowing a single object to have methods implemented in any of the supported languages. We also describe several techniques that we have used to improve the performance of late-bound dynamic languages.
•An implementation of Smalltalk supporting static compilation.•Easy and fast interoperability between C, Smalltalk, and DSLs.•Performance improvements for statically compiled Smalltalk-family languages.
Conclusion: The application described in this study appears to be accurate and valid, thus allowing calculation of a hearing handicap and assessment of the pure-tone air conduction threshold with ...iPhone/iPad devices. Objective: To develop and evaluate a newly developed professional, computer-based hearing handicap calculator and a manual hearing sensitivity assessment test for the iPhone and iPad (AudCal). Methods: Multi-center prospective non-randomized validation study. One hundred and ten consecutive adult participants underwent two hearing evaluations, a standard audiometry and a pure-tone air conduction test using AudCal with an iOS device. The hearing handicap calculation accuracy was evaluated comparing AudCal vs a web-based calculator. Results: Hearing loss was found in 83 and 84 out of 220 standard audiometries and AudCal hearing tests (Cohen's Kappa = 0.89). The mean difference between AudCal and standard audiogram thresholds was −0.21 ± 6.38 dB HL. Excellent reliability and concordance between standard audiometry and the application's hearing loss assessment test were obtained (Cronbach's alpha = 0.96; intra-class correlation coefficient = 0.93). AudCal vs a web-based calculator were perfectly correlated (Pearson's r = 1).
Understandability is a software characteristic that helps ease software maintenance and evolution. When modifying or reusing software that is written by someone else, software developers often have ...difficulties in trying to understand what the existing software does and how. Such an issue is commonly found in software-developing organizations. This paper discusses an approach taken by an IT organization in Thailand which attempts to enforce coding standards within its iOS development team in order to promote software understandability and maintainability. Among coding standards, naming conventions are important but are most often violated. This paper presents the development of a naming convention checking framework that consists of tools to automatically detect naming convention violations in Objective C programs. The framework facilitates iOS developers in modifying the programs so that they adhere to the naming conventions. An experiment showed that the developers’ understanding in the programs that had been modified, as suggested by the naming convention checking framework, did improve at a statistical significance level of 0.05. This approach can enhance program understandability and can be applied to other software-developing organizations.
In 2014, Apple unveiled a completely new programming language for the iOS and OS X platforms. Swift was presented as a modern programming language, such as: safe, easy to learn and easy to use. This ...article presents the performance comparison between the Swift and Objective-C languages. For the purpose of the research, two applications were developed, one in each language, implementing sorting algorithms and data structures such as arrays, dictionaries and sets.
Learn Objective-C on the Macintosh is a classic programming primer for Mac OS X developers. And it’s hard to believe, but this will be the only guide to Objective-C specifically aimed at new ...developers!
Swift vs. Objective-C: A New Programming Language Cristian González García; Jordán Pascual-Espada; Cristina Pelayo G-Bustelo ...
International journal of interactive multimedia and artificial intelligence,
06/2015, Letnik:
3, Številka:
3
Journal Article
Odprti dostop
The appearance of a new programming language gives the necessity to contrast its contribution with the existing programming languages to evaluate the novelties and improvements that the new ...programming language offers for developers. These kind of studies can show us the efficiency, improvements and useful or uselessness of the new programming languages. Also these studies can show us the good or bad properties of the existing programming languages. For these reasons, these studies allow us to know if the new programming language is offering improvements or relapses. In this article, we compare the new programming language of Apple, Swift, with the main programming language of Apple before Swift, Objective-C. We are going to show the differences, characteristics and novelties to verify the words of Apple about Swift. With that we want to answer the next question: Is Swift a new programming language easier, more secure and quicker to develop than Objective-C?
A Novel Coffee Customization System Shang, Wen Qian; Wang, Ying Zi
Applied Mechanics and Materials,
08/2013, Letnik:
380-384
Journal Article
Recenzirano
This project is to develop a coffee-order mobile application based on the iOS. In this mobile phone application software, the user can select and buy regular coffee and custom coffee. At the same ...time, the custom coffee will also be provided to other customers later, and if selected, its designer can get some member points, which can be exchanged for some coffee. In this way, customers are gainer simultaneously. I am intending to design a new buy-coffee experience through this App.
Objective-C Recipes Campbell, Matthew
2012, 2012-07-18T00:00:00, 2012-07-24, c2012
eBook
Objective-C Recipes provides a problem solution approach for dealing with key aspects of Objective-C programming, ensuring you have the indispensable reference you need to successfully execute common ...programming tasks. You will see how to use the unique features of the Objective-C programming language, the helpful features of the Foundation framework, and the benefits of using Objective-J as an alternative. Solutions are available for a range of problems, including:Application development with XcodeWorking with strings, numbers and object collectionsUsing foundation classes like NSArray, NSString, NSData and moreDealing with threads, multi-core processing and asynchronous processingBuilding applications that take advantage of dates and timers and memory managementHow to use Objective-C on other platformsObjective-C Recipes is an essential reference for every Objective-C programmer, and offers solutions in a concise and easy-to-follow manner. Matthew Campbell has trained over 800 new iOS developers at the Mobile App Mastery Institute and iOS Code Camp, and here brings his expertise to offer you the ability to use and exploit Objective-C to get the most out of all of your projects.
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