What is the difference between @synthesize and @dynamic in Objective â€“C?

Swift - Interview Questions

@synthesize : It is used to generate a getter and setter method for the property.

@property (nonatomic, retain) NSButton *someButton1;

…

@synthesize someButton1;

@dynamic : It will inform the compiler that getter and setter are implemented at some other place.

@property (nonatomic, retain) IBOutlet NSButton *someButton1;

…

@dynamic someButton1;