Table view does not update according to bindings

Question

This is a very newbie question, and this is what I have done many times before, but there is something missing for me this time.

In my AppDelegate.h file, I declare NSArray and set it as a property:

@interface AppDelegate : NSObject {
NSArray *lines;

}

@property(readwrite, retain) NSArray *lines;
@end

And then in the AppDelegate.m file in the awakeFromNib method, I select it:

lines = [[NSArray alloc] init];

Then I have a method that sets up an array of strings:

NSString *fileContents = [NSString stringWithContentsOfFile:[NSHomeDirectory() stringByAppendingPathComponent:@"Desktop/sometextfile.txt"] encoding:NSUTF8StringEncoding error:NULL];
lines = [fileContents componentsSeparatedByString:@"\n"];

I have an array controller associated with AppDelegate.self.lines, then I have a table column bound to Array Controller.arrangedObjects. I can confirm that the array is being updated (checked using NSLog), however the contents of the table are not updated (it remains empty).

Is there something obvious I'm missing here?

Answer 1

, Bindings. .

, "AppDelegate.self.lines"...

self?

@property (readwrite, ) NSArray * lines;

, copy . , - , . "" , .

, :

lines = [fileContents componentsSeparatedByString:@"\n"];

. , . KVO, .

, ( , ) . , . setLines:, .

:

self.lines = [fileContents componentsSeparatedByString:@"\n"];

- , ( , @property, ), KVO.

Answer 2

, , , tablview? tableview

Answer 3

You may want to read this ; it has good charts and explanations. What ennuikiller says correctly, I think this is a problem with your data source. This is done by calling

[aTable setDelegate:aDelegate];