Network Requests and GCD from Udacity

What's inside

Syllabus

So far, you've focused largely on UIKit and various UI elements of your apps. Now, you'll learn how to deal with network requests and storing data to the device.

Associated values are values that can be attached to enum cases. In this lesson, learn how to use associated values to enhance enums while simultaneously improving their readability and conciseness.

Guards, or guard statements, specify conditions that must be true for execution to continue. By using guards, you can create preconditions and safely control execution.

In this lesson, learn how to handle errors in Swift. These errors, unlike warnings or issues raised by the compiler, are generated in situations where correct behavior cannot be guaranteed.

Generics is one of the most powerful features in Swift. It powers Swift arrays, dictionaries, and collections, and it can be used to apply functionality to specified types.

Learn about closures, an alternative syntax to functions, as well as how `typealias` allows you to rename existing types.

See what happens behind the scenes when you visit a website and learn the basics of HTTP networking.

Apply your knowledge of HTTP networking to make GET requests in Swift and use GCD to ensure a responsive UI.

Visit the documentation for a third party web API and use it to build a networked iOS app.

Get practice parsing JSON and learn a variety of parsing techniques using Swift's Codable protocol.

Learn about the authentication process, access user-specific data, and make your first POST request in Swift.

Practice reading documentation as you add features to a networked app.

Learn techniques for debugging networked apps, limiting network usage, and properly handling errors.

In this project, you’ll pull in data from a web service to display a map with pins. Tapping on a pin will display a custom URL posted by another iOSND student at that location.

Time to get some more practice with web APIs, and get really comfortable debugging!

Good to know

Know what's good

, what to watch for

, and possible dealbreakers

Teaches use of networking protocols to integrate with apps, which is standard in the mobile app industry

Develops foundational skills in working with networking and APIs, which are core skills for most mobile app developers

Taught by instructors who are widely recognized for their work in programming and computer science

Examines HTTP networking protocols and practices used in web and mobile app development

Covers web APIs and methods used in web and mobile app development

Develops skills in handling errors and debugging networked apps, which is a critical skill for mobile app developers

Career center

Learners who complete Network Requests and GCD will develop knowledge and skills that may be useful to these careers:

Mobile Developer

Mobile Developers specialize in designing, developing, and maintaining mobile applications. This course will help you build a foundation in networking and data handling, which are important skills for Mobile Developers. You will learn how to make network requests using Swift and use Grand Central Dispatch (GCD) to ensure a responsive UI. You will also get practice parsing JSON, which is a common data format used in mobile development.

See salaries and explore the career path for Mobile Developer

Web Developer

Web Developers are responsible for designing, developing, and maintaining websites and web applications. This course will help you build a foundation in networking and data handling, which are essential skills for Web Developers. You will learn how to make network requests using Swift and use Grand Central Dispatch (GCD) to ensure a responsive UI. Additionally, you will get practice parsing JSON, a common data format used in web development.

See salaries and explore the career path for Web Developer

Data Analyst

Data Analysts collect, clean, and analyze data to help businesses make better decisions. This course will help you build a foundation in data handling and networking, which are valuable skills for Data Analysts. You will learn how to parse JSON, a common data format used in data analysis. Additionally, you will learn how to use Swift and Grand Central Dispatch (GCD) to efficiently process and analyze data.

See salaries and explore the career path for Data Analyst

Systems Analyst

Systems Analysts design, develop, and maintain computer systems. This course will help you build a foundation in networking and data handling, which are critical skills for Systems Analysts. You will learn how to make network requests using Swift and use Grand Central Dispatch (GCD) to ensure efficient data processing. Additionally, you will get practice parsing JSON, a common data format used in systems analysis.

See salaries and explore the career path for Systems Analyst

Software Engineer

Software Engineers design, develop, and maintain software systems. This course will help you build a foundation in networking and data handling, which are essential skills for Software Engineers. You will learn how to make network requests using Swift and use Grand Central Dispatch (GCD) to ensure a smooth user experience. Additionally, you will get practice parsing JSON, a common data format used in software development.

See salaries and explore the career path for Software Engineer

Computer Programmer

Computer Programmers write code to create or modify software applications. This course will help you build a foundation in networking and data handling, which are essential skills for Computer Programmers. You will learn how to make network requests using Swift and use Grand Central Dispatch (GCD) to ensure efficient code execution. Additionally, you will get practice parsing JSON, a common data format used in software programming.

See salaries and explore the career path for Computer Programmer

Network Administrator

Network Administrators manage and maintain computer networks. This course will help you build a foundation in networking, which is a critical skill for Network Administrators. You will learn how to make network requests using Swift and use Grand Central Dispatch (GCD) to ensure efficient network performance. Additionally, you will get practice parsing JSON, a common data format used in network administration.

See salaries and explore the career path for Network Administrator

Database Administrator

Database Administrators manage and maintain databases. This course will help you build a foundation in data handling, which is a critical skill for Database Administrators. You will learn how to parse JSON, a common data format used in database management. Additionally, you will learn how to use Swift and Grand Central Dispatch (GCD) to efficiently process and manage data.

See salaries and explore the career path for Database Administrator

Business Analyst

Business Analysts help businesses improve their operations by analyzing data and identifying areas for improvement. This course will help you build a foundation in data handling and networking, which are valuable skills for Business Analysts. You will learn how to parse JSON, a common data format used in business analysis. Additionally, you will learn how to use Swift and Grand Central Dispatch (GCD) to efficiently process and analyze data.

See salaries and explore the career path for Business Analyst

Data Scientist

Data Scientists collect, clean, and analyze data to help businesses make better decisions. This course will help you build a foundation in data handling, which is a valuable skill for Data Scientists. You will learn how to parse JSON, a common data format used in data science. Additionally, you will learn how to use Swift and Grand Central Dispatch (GCD) to efficiently process and analyze data.

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Project Manager

Project Managers plan, execute, and close projects. This course will help you build a foundation in data handling, which is a valuable skill for Project Managers. You will learn how to parse JSON, a common data format used in project management. Additionally, you will learn how to use Swift and Grand Central Dispatch (GCD) to efficiently process and manage project data.

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IT Manager

IT Managers plan, implement, and manage IT systems. This course may help you build a foundation in networking and data handling, which can be beneficial for IT Managers. You will learn how to make network requests using Swift and use Grand Central Dispatch (GCD) to ensure efficient system performance. Additionally, you will get practice parsing JSON, a common data format used in IT management.

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Quality Assurance Analyst

Quality Assurance Analysts test and evaluate software applications to ensure they meet quality standards. This course may help you build a foundation in networking and data handling, which can be beneficial for Quality Assurance Analysts. You will learn how to make network requests using Swift and use Grand Central Dispatch (GCD) to ensure efficient testing. Additionally, you will get practice parsing JSON, a common data format used in quality assurance.

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Technical Writer

Technical Writers create documentation for software and hardware products. This course may help you build a foundation in data handling, which can be beneficial for Technical Writers. You will learn how to parse JSON, a common data format used in technical documentation. Additionally, you will learn how to use Swift and Grand Central Dispatch (GCD) to efficiently process and manage technical information.

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Data Entry Clerk

Data Entry Clerks enter data into computer systems. This course may help you build a foundation in data handling, which can be beneficial for Data Entry Clerks. You will learn how to parse JSON, a common data format used in data entry. Additionally, you will learn how to use Swift and Grand Central Dispatch (GCD) to efficiently process and manage data.

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Network Requests and GCD

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