Singleton pattern in objc, how to keep init private?

Question

How can i make sure user do not call init, instead client should call sharedSingleton to get a shared instance.

@synthesize delegate;

- (id)init
{
    self          


        

Answer 1

You can't make methods private in Objective-C. You could raise a NSException if the wrong initializer is invoked.

- (id)init
{
     [NSException exceptionWithName:@"InvalidOperation" reason:@"Cannot invoke init." userInfo:nil];
}