Grand Central Dispatch (GCD) Closures ReloadedRevisit the concept of closures in Swift. Learn a few properties of closures bypassed in Swift Syntax but are vital when dealing with GCD.GCD and QueuesUnderstand how and what tasks you can run in the background on an app and what must always run in the foreground.Backgrounding Lengthy TasksCreate a simple app that downloads huge images. Apply your newly acquired knowledge to send this network lengthy task to the background in two different ways.CompanyAbout Us Why Udacity? Blog In the News Jobs at Udacity Become a Mentor Partner with Udacity ResourcesCatalog Career Outcomes Help and FAQ Scholarships Resource Center Udacity SchoolsSchool of Artificial Intelligence School of Autonomous Systems School of Business School of Cloud Computing School of Cybersecurity School of Data Science School of Executive Leadership School of Product Management School of Programming and Development Career Resources Featured ProgramsBusiness Analytics SQL AWS Cloud Architect Data Analyst Intro to Programming Digital Marketing Self Driving Car Engineer Only at UdacityArtificial Intelligence Deep Learning Digital Marketing Flying Car and Autonomous Flight Engineer Intro to Self-Driving Cars Machine Learning Engineer Robotics Software Engineer