[Solved] Given this code snippet in AppDelegate, what will happen when the app opens with URL scheme myapp://profile?id=123? func application(_ app: UIApplication, open url: URL, options: [UIApplication.... | iOS Swift

iOS Swift - Navigation

Given this code snippet in AppDelegate, what will happen when the app opens with URL scheme myapp://profile?id=123?

func application(_ app: UIApplication, open url: URL, options: [UIApplication.OpenURLOptionsKey : Any] = [:]) -> Bool {
  if url.scheme == "myapp" && url.host == "profile" {
    print("Open profile with id: \(url.query ?? "none")")
    return true
  }
  return false
}

AReturns false without printing anything

BPrints 'Open profile with id: none' and returns false

CCrashes because url.query is nil

DPrints 'Open profile with id: id=123' and returns true

Step-by-Step Solution

Solution:

Step 1: Check URL scheme and host
The URL scheme is "myapp" and host is "profile", so the if condition is true.
Step 2: Evaluate url.query value
The query part is "id=123", so url.query is "id=123" and prints correctly.
Final Answer:
Prints 'Open profile with id: id=123' and returns true -> Option D
Quick Check:
URL matches scheme and host, query printed [OK]

Quick Trick: Check url.scheme and url.host before using url.query [OK]

Common Mistakes:

Assuming url.query is nil and causes crash
Ignoring url.host check
Returning false despite matching URL

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More iOS Swift Quizzes

Given this code snippet in AppDelegate, what will happen when the app opens with URL scheme myapp://profile?id=123?

Step 1: Check URL scheme and host

Step 2: Evaluate url.query value

Final Answer:

Quick Check:

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