Question

I have an array of objects and I can print them out, so I know they are present.

The problem I have is that I cannot access the variables of the objects.

e.g.

// This prints out correctly
NSLog(@"asset frame in select mode is at index:%d is %@", i, [[AssetsSingleton sharedMySingleton].assetFrames objectAtIndex:i]);

This print outs

asset frame in select mode is at index:0 is
Asset: 0x8087040; frame = (4 2; 75 75); layer = CALayer: 0x808bd00>>

I have the member variables for an Asset as follows

UIImageView *overlayView;
BOOL selected;
id parent;

The problem is I cannot access these e.g. overlayView using

[[AssetsSingleton sharedMySingleton].assetFrames objectAtIndex:i].overlayView.hidden = TRUE;

How can I access these members? The print out seems to be showing that the array holds an Asset.

Answer 1

Either cast or assign the object to a variable before using its properties:

Foo *foo = [myArray objectAtIndex:12345];
foo.bar = 67890;

Or:

((Foo *)[myArray objectAtIndex:12345]).bar = 67890;

Properties are only available to you when the compiler knows the type of the object.