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 UsWhy Udacity?BlogIn the NewsJobs at UdacityBecome a MentorPartner with UdacityResourcesCatalogCareer OutcomesHelp and FAQScholarshipsResource CenterFeatured ProgramsBusiness AnalyticsSQLAWS Cloud ArchitectData AnalystIntro to ProgrammingDigital MarketingSelf Driving Car EngineerOnly at UdacityArtificial IntelligenceDeep LearningDigital MarketingFlying Car and Autonomous Flight EngineerIntro to Self-Driving CarsMachine Learning EngineerRobotics Software EngineerAI Master’sMaster of Business AdministrationMaster of Science in AIUdacity SchoolsSchool of Animation and Game DevelopmentSchool of Artificial IntelligenceSchool of Autonomous SystemsSchool of BusinessCareer ResourcesSchool of Cloud ComputingSchool of CybersecuritySchool of Data ScienceSchool of DevOpsSchool of Executive LeadershipSchool of Product ManagementSchool of Programming and Development