Introduction to SWIFT, introduction to the SWIFT system

Swift is a new development language released by Apple in June 2014, WWDC2014 press conference from the demo** and the subsequent launch of the AppStore standard documentation, the syntax content is a mix of OC, JS, Python, and can be used with Objective-C (the programming language used by the Apple operating system before the introduction of Swift) on Mac OS and iOS platforms, for building applications based on the Apple platform.

In 2015, Apple announced the open source of swift, this language into the period of rapid development, every major version of the iteration, so that a lot of things need to be re-learned, so that developers are happy that the iterative update raises the threshold of the job, will also eliminate some competitors, in disguise to improve their own status, but carelessly, they have no learning ability and will fall behind.

However, fortunately, not long ago, Apple released Swift5, ABI is finally relatively stable, and the syntax should not change much in the future.

Swift has a number of other features to make your approach more expressive: closure unification with function pointers, tuples and multiple returns, generics, fast and concise iteration of scopes or collections, supported methods, extended protocol structures.

With the popularity of Apple's mobile phone, it means that Guofan is a huge consumer group, and the programming language that its program needs to support is also very important, which is why Swift will continue to attract attention and learning. Brother Li Mingjie has launched a related course on SWIFT, and interested partners can take a look.

To get started, you first need to be an iOS developer, after all, this is a programming language based on Apple's system; The other is to have an attitude and be willing to take the time; If you can, have a partner to study with; If you need to get started urgently, you may also be able to consult an experienced colleague or even a professional teacher.

SWIFT is the abbreviation of Society for Worldwide Interbank Financial Telecommunications, which is an international interbank international cooperation organization, also known as the SWIFT organization. It is an international inter-bank non-profit international cooperation organization that organizes all its members according to the working relationship of the banks and financial institutions of the world, based on the common interests of the member banks and financial institutions of the world, registered in accordance with the Belgian legal system, and is headquartered in Brussels, Belgium. Founded in 1973, most banks in most countries around the world now use the SWIFT system.

The use of SWIFT enables the bank's settlement to provide safe, reliable, fast, standardized and automated communication services, thereby greatly improving the bank's settlement speed. Due to the trembling or standardization of the SWIFT format, the current format of letters of credit is mainly in SWIFT messages.

The future and development of SWIFT --- the shift to a new generation of SWIFT systems.

Swift, Apple's new development language announced at the 2014 WWDC (Apple Developer Conference), can run with Objective-C* on Mac OS and iOS platforms for building applications based on the Apple platform. Swift is an easy-to-learn programming language, and it's the first system programming language to be as expressive and fun as a scripting language. Swift is designed with security in mind to avoid a variety of common programming error categories.

On December 4, 2015, Apple announced that its Swift programming language is now open source**. The Swift Programming Language2 is over 600 pages long and is available for free.

Now programming is born in usThere are more and more people in my life, and there are many people who want to learn programming skills, but because they are all new to it, they don't know how to learn it. But if you want to learn programming and don't have any basic knowledge yet, here's what advice I can give:

Is it to enrich yourself, or is it your inner desire for computers (not just computers)? If you enrich yourself, then you can learn and understand the basic things for a long time in addition to programming, such as computer networks, computer hardware, computer history, computer infrastructure, etc. At the same time, this content is also a major course for computer science students in college.

If it's a fascination or desire for computers, that's fine. Interest is the greatest teacher. You can choose the direction you want to learn about according to the arrangement of a university course and study it in depth.

Let's say you're doing it for personal interests (maybe in high school, you might not have a very deep grasp of interests.) And if you want to learn to code, there must be a field you enjoy. For example:

iPhone development, Android development, robot and other embedded development, Web** application development, Windows desktop program development, the latter Linux server kernel driver development. Each of these areas is worth many years of study. But once you have an interest, you can continue to accumulate and develop your knowledge system and programming skills in a field.

There are tools, ideas, and the ability to practice. Only when you write something in a certain language can you better master this skill. For example, you write an iPhone app, an Android app, or a web app, or a win desktop app.

At this time, interest is still your teacher, pointing you in the direction.

The computer field has changed from concept, knowledge, system architecture, and language to the whole process of operation and maintenance, and the knowledge system is relatively large, and programming is only one of the links and fields. The cultivation and accumulation of this knowledge should be summarized in the process of continuous study and practice. I hope you can satisfy your curiosity in the field of computing, and you can also create greater value and achievement.

Experienced programmers know that the language is not the key, the key is the framework. If you learn iOS development, you need to use Cocoa, in fact, this CoCoa has been written in Objective-C for more than ten years, so if you know OC very well, it is easy to understand why Cocoa's various functions and APIs are written like this, but Swift is not, because Swift contains a lot of high-level language features, which are not easy for you to understand from the perspective of Swift. The second reason is because, from 07 to now, programmers have been writing iOS programs with OC for nearly 6 or 7 years, and all kinds of third-party frameworks have emerged in an endless stream, and you have to use network-related, OK.

Afnetworking, pop for animation, FMDB for databases, etc.

Of course, you can also use third-party libraries written by OC when developing in Swift. The point is, there are so many excellent frameworks that you can't read the source code because of the language. Isn't it a pity?

And if there is a third-party control, your product needs you to change some places, and you say, you don't understand OC so you can't change it. What to do. Excellent IOS must be proficient in Objective-C, because learning a language is very simple, it is rare to be proficient in the framework, familiar with all kinds of common pitfalls, from the current point of view, OC in these aspects, are stronger than the current stage of Swift.

Of course, the future is definitely Swift's world.

1.See the big picture. You need to have a big picture of what you're learning. In other words, what is the use of what you want to learn, what is it for? This has to be figured out.

2.Determine the scope. You have to be clear about what you want to learn, not too big, for example, you say you want to be proficient in physics, how is it possible? Right? Make sure you can do something after you learn this, such as writing a little game or something.

3.Define your goals. This step is a sublimation version of the second step, and the purpose you want to achieve in the second step is written in a clear context, and the clearer it is, the more likely it is to succeed.

6.Filter resources. Pick the most valuable resources to learn, but don't just pick one, but at least two.

7.Start learning according to the study plan, start learning from a certain point, and remember to follow the plan and don't be greedy.

8.Hands-on. Don't do Zhao Kuo.

9。Apply. After you finish learning, you should use what you have learned to do something fun. Deepen your understanding.

10。Good teacher. If you want to teach others, you can give what you have learned to others, and you can really learn. And in the process of teaching, you will refine what you have learned, and you will also encounter various problems, which will make you delve deeper into things.

11, starting from 7 to 10, and the cycle repeats.