About the Tutorial

Strong Reference Cycles for Closures .................................................................................................. 155

 

Weak and Unowned References ......................................................................................................... 156

 

 

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Swift 4 

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30.

 

SWIFT 4 – OPTIONAL CHAINING ...................................................................................... 158

 

Optional Chaining as an Alternative to Forced Unwrapping ................................................................ 158

 

Defining Model Classes for Optional Chaining & Accessing Properties ................................................ 160

 

Calling Methods Through Optional Chaining ....................................................................................... 162