[Solved] Given the code below, what will be printed when model.count = 5 is executed? class Model:... Given the code below, what will be printed when model.count = 5 is executed? | iOS Swift

iOS Swift - State Management in SwiftUI

Given the code below, what will be printed when model.count = 5 is executed?

class Model: ObservableObject {
  @Published var count: Int = 0
}

let model = Model()
model.$count.sink { print("Count changed to \($0)") }

ACount changed to 5

BCount changed to 0

CNo output

DCompile error

Step-by-Step Solution

Solution:

Step 1: Understand @Published publisher
@Published creates a publisher accessible via $property, here $count, which emits new values on change.
Step 2: Analyze sink subscription and assignment
The sink closure prints the new value when count changes. Setting model.count = 5 triggers the print with 5.
Final Answer:
Count changed to 5 -> Option A
Quick Check:
@Published publishes new values = Count changed to 5 [OK]

Quick Trick: Remember: $property publishes changes, sink prints new value [OK]

Common Mistakes:

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Given the code below, what will be printed when model.count = 5 is executed?