Re: Getting the right objects in an Array
Re: Getting the right objects in an Array
- Subject: Re: Getting the right objects in an Array
- From: "Shawn Erickson" <email@hidden>
- Date: Mon, 5 Nov 2007 10:37:59 -0800
On 11/5/07, Marcel Borsten <email@hidden> wrote:
> I'm using the following code to fill a NSMutableArray with strings
> from the NSDictionary object. The for loop gets the instances of the
> keys 'name' and puts the string in the mutable array object
> 'firstNames'. In my program it uses the firstNames-array to fill a
> NSPopupButton with the Array of NSStrings. When that happens the
> program exits with a "EXC_BAD_ACCESS"-error.
When what happens? What it the stack trace at the time of the crash?
> It looks to me that the
> objects in the returned mutable array are not NSString objects. When I
> debug, Xcode shows my NSString-value as 'invalid'.
Consider using NSLog to help trace what is taking place however the
debugger is usually the best way. Are you sure you are using a debug
build of you application and stopping at a point in time that ensures
the vars you are interested in are valid (in scope).
For example try using the following code...
...
NSArray *myArray = [dict objectForKey: @"List"];
NSLog(@"myArray=%@", myArray);
firstNames = [NSMutableArray array];
int i, myNameList = [myArray count];
for ( i = 0; i < myNameList; i++ ) {
NSDictionary *nameEntry = [myArray objectAtIndex: i];
NSLog(@"nameEntry=%@", nameEntry);
NSString *name = [nameEntry valueForKey:@"name"];
NSLog(@"name=%@", name);
[firstNames addObject: name];
}
...
If the above logs what you expect then your problem is someplace
else... As a guess I would say you aren't managing the life of
firstNames correctly and it is disappearing before you get a chance to
update your view object with the data.
You don't list how you populate the NSPopupButton.
-Shawn
_______________________________________________
Cocoa-dev mailing list (email@hidden)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden