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[yoichi]

I had a similar problem as I am new to Objective-C. As others are saying, it is the same as the normal C but one difference. That is, you can use them as you expect, but not with Objective-C specific things.

I figured out that C variable initializers can be used in the class interface, too, but not between @interface and the {...} or within the "{...}".

Otherwise they can be declared as you do with normal C header files. They can be also declared outside the block surrounded by an @interface and the paring @end.

E.g. This is OK and the emptyCoordinate can be used in the @implementation:

@interface ...
{
 ...
}

static const CLLocationCoordinate2D emptyCoordinate = {-1.0, -1.0};

@property ...
...
...
@end

@implementation ...

@synthesize myCoord;

- (void)viewDidLoad
{
   myCoord = emptyCoordinate;
   ...
}

@end

Or:

static const CLLocationCoordinate2D emptyCoordinate = {-1.0, -1.0};
@interface ...
...
@end

Or:

- (void)viewDidLoad
{
   ...
   CLLocationCoordinate2D emptyLoc = {-1.0, -1.0};
   ...
}