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@gregheo ! NSBudapest, May 2018 Shared
 Exclusive
 Mutable
 Immutable

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@gregheo ! NSBudapest, May 2018 Data "

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@gregheo ! NSBudapest, May 2018 Code Example #

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@gregheo ! NSBudapest, May 2018 Exclusive Shared Immutable Mutable

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@gregheo ! NSBudapest, May 2018 Exclusive Shared Immutable Mutable

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@gregheo ! NSBudapest, May 2018 Exclusive Shared Immutable private let Screen size / scale Mutable private var
 private queue $

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@gregheo ! NSBudapest, May 2018 Fewer entry points

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@gregheo ! NSBudapest, May 2018 Private queues

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@gregheo ! NSBudapest, May 2018 Queue Callback

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@gregheo ! NSBudapest, May 2018 
 // call from anywhere!
 public func something() {
 privateQueue.sync { … } }


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@gregheo ! NSBudapest, May 2018 
 // always call on the main queue!
 public func something() 


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@gregheo ! NSBudapest, May 2018 
 // always call on the main queue!
 public func something() {
 dispatchPrecondition(condition: .onQueue(.main))
 }


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@gregheo ! NSBudapest, May 2018 Make it difficult
 to get wrong

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@gregheo ! NSBudapest, May 2018 köszönöm! ☺