IOS Development Using Watchkit - Essay Example

iOS Development Using Watchkit Introduction: Of essence in the Network area is the field of mobile operating system. The smart phone utility has become a daily activity for most people as it has made easy human lives in many ways. Many large corporations have come up offering numerous mobile operating systems. These firms include Samsung, Windows, Google, Apple, and many others. This paper is a study that focuses on testing and discovering the iPhone operating system (iOS). iPhone operating system can be described as a mobile operating system, developed by Apple Inc. The design of the system if custom made to suit only the Apple hardware. This operating system can support the iPod, iPhone, and iPad which are all under the Apple mobile portfolio. iOS development is the process of creation of applications that run on the iOS powered devices. iOS Development In the mobile platform, a large market share is held by the iPhone; this being the reason behind interest in learning about iPhone development. The process of development entails an outline of how to establish the hardware for the applications. Setting of the software requirements and the final system requirements is also part of the process. Apple Inc. has made it easier for people who want to become developers with them. All a person needs is an account charged $99 annually, a mac computer, Xcode platform and a coding experience, such as the Swift and Objective-C coding languages. A developer page is availed that allows for download of the latest software and SDKs. The page also enables a certification for creation of profiles and groups and one has is free to manage the account and report any difficulty or bugs faced. Swift The apple Inc. created a modern programming language called swift. It is specifically developed to be more precise and flexible that the Objective-C. Swift has LLVM (Low Level Virtual Machine) compiler framework that utilizes the objective-C runtime allowing C, C++, Swift code and Objective-C to run in a single program. The flexibility of Swift is attributed to its capacity to support widespread late binding, dynamic dispatch and extensible programming. It is also considered safe and can effectively manage the common programming errors, for example, the syntactic and the null pointers to prevent occurrence of unwanted results. Features The Swift programming language has several features that indicate some similarities to the Objective-C, though are easier and more flexible. Many types of variables are supported by Swift, and are constant just like in the other languages. Any variable can be declared from any type by utilizing colon (:) after the name. The colon implies of type, for instance, Var name: String. Declaration of a constant with a non-changeable constant value is also possible, for example: Let name: String. The following types of declaration are supported by Swift: String (for the string values), Int: (for the double values that represent the 64-bit floating point number); Float: (float values representing 32-bit floating-point number), Bool (representing the Boolean values. Printing variables and constants can be done using the method of: Println(”Hello World”) A value can be inserted to print by: Println(“Hello World by: \(name)”) Adding a comment in a code is very useful in making the code readable and as a reminder. This is done by: //// Write your comment here. Swift does not entail the use of semicolon like the other languages after each statement in the code. The semicolons are only required when there is the need of writing several separate statements in one line. For example, let name: String = “Areej”; println(name) An optional variable is set to a valueless state by assigning to it the special value nil. The conditional statements such as if-in, if, if-else are used just like in any other languages. Basic Operators The operators are used in giving values, changing values or combining values. The assignment operators (=) are used in updating or initializing values. The fundamental arithmetic operators are supported by Swift for all numbers types such as addition (+), subtraction (-), multiplication (*) and division (/). The (x%y) remainder operator works out the number of multiples of y that can fit inside x and give back the left over value. Increment operators such as i++, ++I are used in increasing the value of I by 1. Decrement operator i--, --I are used in decreasing the value of I by 1. All the standard C comparison operators are supported by Swift; they include Equal to (a == b), not equal to (a != b), Greater than (a > b), Less than (a < b), Greater than or equal to (a >= b) and Less than or equal to (a String { let greeting = "Hello, " + Name + "!" return greeting} Similar to blocks in C and Objective-C are closures in Swift that can be used in code and passed around. An enumeration is used in defining the common type for a group of related values that enables the user to work with the values in a type-safe way within the code. The introduction of the enumerations with enum keyword then follows which places the whole definition within a braces pair: enum Color { case Red case Green case Blue case Orange } Classes and structures Classes and structures refer to the flexible constructs that create the blocks of the code of the user’s program. It utilizes the same syntax as those of the variables, constants and functions so that the user can define the structures and classes. The classes and the structures have same definition syntax. Class keywords are used in the introduction of classes and the struct keywords used in introit=ducting the structures: classClassName { // class definition goes here } structStructureName { // structure definition goes here } Methods refer to the functions that are related to a particular type. Instance methods can be defined by structures, classes and enumerations that encapsulate particular tasks and functionality in operating with a given type of instance. Type methods can also be defined by the enumerations, structures and classes that are associated with the type itself. In the Objective-C, the class methods are similar to the type methods. A class has the capacity to inherit properties, methods as well as other characteristics from other classes. In the instance that one class inherits from another, the class that is inheriting is known as the subclass while the class that it inherits characteristics from is referred to as the superclass. The inheritance is a basic behavior which distinguishes the classes from other types in the Swift. Subclassing, therefore, refers to the process of basing new classes on the existing ones. The subclass will thus inherit the characteristics from the existing classes which can then be refined. New characteristics can be added to the subclass. Initialization would refer to the process that involves preparation of an instance of class, enumeration and structure for utility. The process entails the setting of an original value for each of the stored property on the instance and performing any other appropriate initialization or set up that is needed before the new instance becomes ready for use. Initializers are adopted to enable the creation of new instance of particular types. An initialize can be compared to an instance method in its simplest form with no parameters that are written using the init keywords: init() { // perform some initialization here } Before the deallocation of a class instance, a deinitializer is immediately called. The deinit keyword is used in writing the deinitializers, in a similar fashion to how the initializers are written using the init keyword. The availability of the deinitializers is limited only to class types. Only one deinitializer can be possessed by a class definition per class. The deinitializers are written with no parenthesis and do not have any parameters. deinit { // perform the deinitialization } Optional Chaining refers to the process of calling and querying methods, properties and subscripts on an option that may be nil presently. The property, subscript or method will succeed if the optional contains a value; however, the property, subscript or method returns nil if the optional is nil. If any link in the chain having multiple queries is nil, the whole chain will fail gracefully. These form the foundation of the Swift language, even though there are other language concepts. The Apple watch, otherwise known as iWatch, is a smart watch presented by Aplle Inc. in April 2015. The watch features health oriented and fitness tracking capabilities as well as an integration with iOS and other services and products of Apple. The device is in three collections, the Apple Watch, the Apple Watch Sport and the Apple Watch Edition. The watch products depend on wirelessly connected iPhone for them to perform many of their default functions such as texting and calling. Read More