A little introduction to Swift 2.0
A while ago, Apple came up with the big news of releasing out the new programming language Swift. It was a little shocker for all the developers but everyone welcomed language. Objective C is soon going to be obsolete and swift will be the choice to develop Applications for Apple products. As expected the language came up with few unfinished touch. These finishing touches came up in the swift version 2. Now the language is now more mature and more baked.
A must known fact to all programmers
Just wanted to let you know that if you are looking to jump into IOS development, then this is the perfect time. Swift just came up, No one is perfect and community is kind to help each other. If the syntax of Objective-C was scaring you before or you thought that things are already into speeding level, then here we are with everyone in the first gear speed. Hop in and start to understand the core syntax of the language.
Will there be any updates in the course?
Yes, there will be many updates in the course. Since this course is a focused and comprehensive course on programming, therefore as the things will move towards stability, more videos on advance topics will be covered. Being honest with you all, the course is more oriented towards language and not towards developing Application. We will be covering a lot more grounds on language features and not on the drag and drop application building process.
Swift is one the most powerful language around and the market for swift developer is going to pick the speed soon. Make sure that you are ready for it. Just developing application is not enough, to implement your own idea and to craft an application from it, you need comprehensive understanding of programming basics.
An audio lecture to help you to understand the right steps to be taken while learning the iOS development. This lecture alone is going to clear up a lot of things, including the importance of learning swift before going on the drag and drop development.
Although there are only very few requirements to take this course but yes, there are few. You should be aware of some programming concepts regardless of whatever the language you might be working on.
A quick tour on HOW THE COURSE IS GOING TO PROCEED.
Learn how to get xcode in this movie. The xcode that we require is not available in the App Store as of the recording of the course. Minimum requirement is Xcode 7
A lot of people like to teach on playground files. It is fast and little buggy too in beta. We prefer that students write the code on the playgrounds as of quick understanding. But building terminals application gives better confidence over the syntax. Again Choice is your and yours only.
A documentation guide to have a quick look over the swift programming language.
A quick guide to see the changes that are imposed in the swift 2.0 version as compared to older version of swift.
Please download the supporting exercise files from here. Make sure that you read the text of the lectures too, to resolve the problems on your system.
All we want to do first in the programming language is to learn to declare variables in it. We will look at declaring variables as well as type annotation concept that is running behind, whenever any variable is being declared.
Constants are declared in the swift by using the keyword let. Once the constant is declared, that cannot be changed over the course of time of that program. Swift encourages you to declare constants whenever there is a choice between constants and variables.
Strings hold an important place in swift. The concept of string interpolation may sounds tough but it is the simplest concept with fancy name. Have a look at this video to understand the concept.
Conditionals are must have in any programming language. if else are one of the most common in all programming language including swift. There are only few small concepts to take care while writing if else.
Having nested if else that is too deep is not a good idea. We can test multiple conditions using switch case statements. Swift also comes with keywords like break, default and fallthrough
Looping is not a new concept and the same while loop is going to work in the case of swift as well. The only difference is in Do WHILE loop as the DO keyword is now reserved for try catch statement.
Optionals is another concept that allows you to be vague in swift. This concept allows you to get the value later after declaration of the variable.
Functions are essential part of swift and is similar to the concept of methods in classes. Function means to wrap up some line of code and call them on the go
Instead of having 100's of same type of variables, having an array is better option to have. Array indexing starts from zero and can be defined as one data type only. There are some inbuilt functions with array too.
A dictionary stores associations between keys of the same type and values of the same type in an collection with no defined ordering. Each value is associated with a unique key, which acts as an identifier for that value within the dictionary.
Tuples group multiple values into a single compound value. The values within a tuple can be of any type and do not have to be of the same type as each other.
Enumerations in Swift are first-class types in their own right. They adopt many features traditionally supported only by classes, such as computed properties to provide additional information about the enumeration's current value, and instance methods to provide functionality related to the values the enumeration represents.
Closures are self-contained blocks of functionality that can be passed around and used in your code. Closures in Swift are similar to blocks in C and Objective-C and to lambdas in other programming languages.
Closures can capture and store references to any constants and variables from the context in which they are defined.
Classes are general-purpose, flexible constructs that become the building blocks of your program's code. You define properties and methods to add functionality to your classes by using exactly the same syntax as for constants, variables, and functions.
A class can inherit methods, properties, and other characteristics from another class. When one class inherits from another, the inheriting class is known as a subclass, and the class it inherits from is known as itssuperclass. Inheritance is a fundamental behavior that differentiates classes from other types in Swift.
Properties associate values with a particular class, structure, or enumeration. Stored properties store constant and variable values as part of an instance, whereas computed properties calculate (rather than store) a value.
Classes and structures in Swift have many things in common. Both can:
A protocol defines a blueprint of methods, properties, and other requirements that suit a particular task or piece of functionality. The protocol doesn't actually provide an implementation for any of these requirements—it only describes what an implementation will look like. The protocol can then be adopted by a class, structure, or enumeration to provide an actual implementation of those requirements.
Extensions add new functionality to an existing class, structure, or enumeration type. This includes the ability to extend types for which you do not have access to the original source code (known as retroactive modeling). Extensions are similar to categories in Objective-C.
Generic code enables you to write flexible, reusable functions and types that can work with any type, subject to requirements that you define. You can write code that avoids duplication and expresses its intent in a clear, abstracted manner.
Swift uses Automatic Reference Counting (ARC) to track and manage your app's memory usage. In most cases, this means that memory management “just works” in Swift, and you do not need to think about memory management yourself. ARC automatically frees up the memory used by class instances when those instances are no longer needed.
More videos will be added when the official announcement of swift 2.0 takes place
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