Question

Refactoring old code, I want to change the following method:

- (id)initWithFrame:(CGRect)frame
{
     // original logic
}

to:

- (id)initWithFrame:(CGRect)frame andDelegate:(id<myDelegateProtocol>)delegate
{
     // original logic

    if(delegate)
    { 
        _delegate = delegate; 
    }
}

To ensure that no dependent code breaks, I update the original method to reference the old method, like so:

- (id)initWithFrame:(CGRect)frame
{
     return [self initWithFrame:frame andDelegate:nil];
}

However, if anyone is still consuming that original method, I want Xcode to fire a warning (similar to when methods in iOS get deprecated). Ideally, something like:

- (id)initWithFrame:(CGRect)frame __warning__(@"This method has been replaced to ensure that you set the delegate. Please update your code.");
{
     return [self initWithFrame:frame andDelegate:nil];
}

Note that these deprecations may happen before a new version iOS is released.

Answer 1

In the interface file, do this:

- (id)initWithFrame:(CGRect)frame__attribute__((deprecated("Use initWithFrame: andDelegate")));