Beginner
Swift
Q30 / 100
What is a property observer in Swift?
Correct! Well done.
Incorrect.
The correct answer is B) willSet and didSet blocks that run before and after a property value changes
B
Correct Answer
willSet and didSet blocks that run before and after a property value changes
Explanation
var score: Int = 0 { willSet { print("About to set \(newValue)") } didSet { print("Set from \(oldValue)") } }
Progress
30/100