No known instance method for selector error in NSMutableArray - iphone

Question

I have a problem accessing a object in my array. I store "Place" objects in my NSMutableArray. I want to access this array for my TableView. I get the "No known instance method for selector" error in line one. See lines below.
cell.imageView = [[self.currentPlaces objectAtIndex:indexPath.row]picture];
cell.subtitleLB.text = [[self.currentPlaces objectAtIndex:indexPath.row]description];
cell.objectNameLB.text = [[self.currentPlaces objectAtIndex:indexPath.row]name];
This is my Place object:
#interface Place : NSObject{
CLLocation *objectLocation;
UIImageView *picture;
NSString *name;
NSString *description;
}
The access of the properties "description" and "name" is no problem. I just dont know why this error occurs.
Thx. Dominik

Answer 1

I had the same problem; what worked for me was passing the UIImage instead of the UIImageView. So your code should look like this:
#interface Place : NSObject{
CLLocation *objectLocation;
UIImage *picture;
NSString *name;
NSString *description;
}
and this
cell.imageView.image = [[self.currentPlaces objectAtIndex:indexPath.row]picture];
cell.subtitleLB.text = [[self.currentPlaces objectAtIndex:indexPath.row]description];
cell.objectNameLB.text = [[self.currentPlaces objectAtIndex:indexPath.row]name];
If that doesn't work I'll post some more code for you to look at.

Answer 2

You haven't actually declared any methods. What you have declared are instance variables. You should probably be using #propertys instead.
#interface Place : NSObject
#property (nonatomic, retain) CLLocation *objectLocation;
#property (nonatomic, retain) UIImageView *picture;
#property (nonatomic, copy) NSString *name;
#property (nonatomic, copy, getter=objectDescription) NSString *description;
#end
This will actually create the methods that you want. Note that I changed the method for the description property to read -objectDescription. This is because NSObject already declares the -description method and you shouldn't be overriding it with an unrelated property.
If you're on recent Clang, then this is all you need, and instance variables will get synthesized automatically (using an underbar prefix, e.g. _picture). If you're on an older version (e.g. if this causes errors), you need to add #synthesize lines, as in
#implementation Place
#synthesize objectLocation=_objectLocation;
#synthesize picture=_picture;
#synthesize name=_name;
#synthesize description=_description;
#end