On 25 Feb 2008, at 22:31, Eckart Schlottmann wrote:
Hi,
I need some help on NSTreeController usage.
I use an NSTreecontroller with Garbage Collection and OBJ C 2.0.
I have a Structure of Nodes (class FileSystemEntry) which provide
children as a NSMutableArray with a getter and setter for the
complete arrays:
- (NSMutableArray *)internalChildren {
return internalChildren;
}
- (void)setInternalChildren:(NSMutableArray *)newValue
{
internalChildren = newValue;
}
-(BOOL) isLeaf {
return isLeaf;
}
-(void)setLeaf:(BOOL)v {
isLeaf=v;
}
Hi Eckart,
Firstly, if you're using GC, you can replace your internalChildren
accessors with a property using the assign keyword:
@property(assign) NSMutableArray *internalChildren;
You're NSTreeController will also have a leaf key path (-
setLeafKeyPath:) which you can set in IB if you want. You probably
set it to isLeaf in which case you're method naming may need to be
more consistent. Check the NSTreeController's childrenKeyPath is also
set to internalChildren.
- (BOOL)isLeaf:
- (void)setIsLeaf:(BOOL)v;
Again, you're not doing anything special in the accessors you wrote so
make it a property:
// MyNode.h
@property(assign) BOOL isLeaf;
//MyNode.m
@synthesize isLeaf;
You'll always need to use these accessors, not set the ivar directly.
Hope this helps, sorry if I've stated the obvious to you.
Jon
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