iOS Swift - User Input and Forms
You want to capture a user's contact info in a form with optional phone number. Which struct design correctly models this?
You want to capture a user's contact info in a form with optional phone number. Which struct design correctly models this?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Identify optional property need
Phone number is optional, so it should be declared as an optional type String?.Step 2: Ensure required property is non-optional
Email is required, so it should be a non-optional String.Final Answer:
struct Contact { var email: String; var phone: String? } -> Option DQuick Check:
Optional phone = String? type [OK]
Quick Trick: Use ? for optional form fields [OK]
Common Mistakes:
- Making phone non-optional
- Making email optional when required
- Making both optional unnecessarily
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