macOS How to use NSArrayController

[0119374]

Hi to all,

I want to show in NSTableview some info.

I see in apple developer documents that it shows using bindings and NSArrayController but i don't get it work.

This is my situation :

@interface PersonsList : NSObject
{
NSMutableArray *persons;
NSString *city
}

@interface Person : NSObject
{
NSString *name;
NSString *zipCode;
NSString *address;
}

NSMutableArray persons is an array of person objects.

I want to show in NSTableview the info of Person Object i have in PersonsList NSMutableArray persons.

Thanks.

 

[caveman_uk]

You need to write KVC setters and getters...or use an NSMutableDictionary.

 

[0119374]

You need to write KVC setters and getters...or use an NSMutableDictionary.

Thanks for your reply , but can you give an example of what i have to do?

 

[kainjow]

Check out this article: http://cocoadevcentral.com/articles/000080.php

 

[0119374]

Check out this article: http://cocoadevcentral.com/articles/000080.php

Thanks for your reply , i saw the articule but i still don't know how to do bindings with my existing classes.

 

[caveman_uk]

If you stick with what you've got you need to write a bunch of methods like

-(NSString*) name;
{
    return name;
}

-(void) setName:(NSString*) newName;
{
   [newName retain];
   [name release];
   name=newName;
}

You need to do that for every public variable that isn't an array.

OR

You could do like the examples and change is so you have one variable that's a mutable dictionary then you only need to write one pair of properties/setProperties methods.

Of course in Objective-C 2.0 you won't have to write all these setters/getters as then we'll have 'properties'. Sadly that will be Leopard only....

 

[Eraserhead]

Can't you create an NSArrayController and use that like you do for CoreData?

TBH though the table displaying methods are pretty easy, you just implement

-(int)numberOfRowsInTableView:(NSTableView *)aTableView;

and

-(id)tableView:(NSTableView *)aTableView
objectValueForTableColumn:(NSTableColumn *)aTableColumn
		   row:(int)row;

In your application controller, then you point the table's "data source" connection to your application controller.

Then you just use the reloadData method in NSTableView to change what gets displayed in the table.

 

[caveman_uk]

Yeah but he was asking about using bindings. You could use the datasource methods and in some cases they're still the best option but that wouldn't be using bindings.

 

[Eraserhead]

Yeah but he was asking about using bindings. You could use the datasource methods and in some cases they're still the best option but that wouldn't be using bindings.

I know, I think people get obsessed with bindings, they aren't always the best way .

 

[caveman_uk]

I know, I think people get obsessed with bindings, they aren't always the best way .

Especially if you're using custom cells in your tableview.

Bindings are pretty cool if you're doing a master-detail kind of interface however.

 

[0119374]

Can't you create an NSArrayController and use that like you do for CoreData?

TBH though the table displaying methods are pretty easy, you just implement

-(int)numberOfRowsInTableView:(NSTableView *)aTableView;

and

-(id)tableView:(NSTableView *)aTableView
objectValueForTableColumn:(NSTableColumn *)aTableColumn
		   row:(int)row;

In your application controller, then you point the table's "data source" connection to your application controller.

Then you just use the reloadData method in NSTableView to change what gets displayed in the table.

Thanks , with this i can get NSMutableArray *persons from PersonsList into NSTableView.

But how to get it work with bindings ?.

-(NSString*) name;
{
return name;
}

-(void) setNameNSString*) newName;
{
[newName retain];
[name release];
name=newName;
}

I do this in all objects that isn't an array , but i can't get it work.

 

[Eraserhead]

Thanks , with this i can get NSMutableArray *persons from PersonsList into NSTableView.

Good, so just use this .

EDIT: As a general tip about programming: If it works, and at a decent speed on the target system it is fine and leave it and work on the next problem, time is finite after all.

 

[slooksterPSV]

In interface builder, you bind the columns of the objects with the array controller and the value the column is supposed to hold. E.g. if your NSArrayController was called Persons, you'd do the bindings for the column (lets say of name) as it's going to bind to Persons; then in the text field it'sll say value and you type in name On one of those sites it shows you how to do it, with pictures and that.