FROM FAMILIAR PATTERNS TO SWIFT

Objective-C to Swift

A small migration helper for common declarations, simple properties, and logging. Unsupported lines are marked for manual review. Translation stays in your browser.

Objective-C

Swift draft

import Foundation

var name: String = "Sam"
var count: Int = 3
var ready: Bool = true
print(name)

4 lines translated

Common equivalents

Migration involves design decisions as well as syntax. Use this table as a starting point.

Objective-C	Swift	Consideration
`NSString *`	`String`	A Swift value type
`NSInteger / NSUInteger`	`Int / UInt`	Use unsigned values only when your domain requires them
`BOOL / YES / NO`	`Bool / true / false`	A distinct Boolean type
`NSArray<T> *`	`[T]`	Choose an explicit element type
`NSDictionary<K, V> *`	`[K: V]`	Keys must conform to Hashable
`nullable`	`Optional<T> / T?`	Represent actual absence
`NSError **`	`throws`	Update caller error handling
`completion block`	`async / await`	Review cancellation and actor isolation

The helper handles literal scalar declarations and a limited set of property and NSLog patterns. It does not parse complete classes or guarantee equivalent behavior. Validate migrated code in your project.

Apple’s Objective-C migration guide