macOS Illegal NSTableView data source with Hillegass Code

[duggram]

I'm working on the Speakline exercise in the Hillegass Cocoa Programming book. In Chap. 6 up to page 105. When I run the app I get no values in the table. I do get this error message:

Illegal NSTableView data source (<AppController: 0x133dd0>). Must implement numberOfRowsInTableView: and tableViewbjectValueForTableColumn:row:

I have triple checked all code and IB maneuvers. I have checked his web page for errata, there is something unrelated for page 106.

I downloaded his solutions code. His solution Speakline_B looks nothing like the code in the book at this point.

I searched the Web for others that may have the same problem. No solutions.

Any advice on how I can get values to show up in the table? And, eliminate the error code?

BTW here's my code:

AppController.m

#import "AppController.h"


@implementation AppController

- (id)init
{
	[super init];	
	NSLog(@"init");
	
	// create new instance of NSSpeechSynthesizer
	speechSynth = [[NSSpeechSynthesizer alloc] initWithVoice:nil];
	[speechSynth setDelegate:self];
	[tableView setDelegate:self];
	voiceList = [[NSSpeechSynthesizer availableVoices] retain];
	return self;
}

- (void)speechSynthesizer:(NSSpeechSynthesizer *)sender
		didFinishSpeaking:(BOOL)complete;
{
	NSLog(@"complete = %d", complete);
}

- (IBAction)sayIt:(id)sender
{
	NSString *string = [textField stringValue];
	
	// Is the string zero-length
	if ([string length] == 0) {
		NSLog(@"string from %@ is of zero-length", textField);
			  return;
	}
	[speechSynth startSpeakingString:string];
	NSLog(@"Have start to say: %@", string);
	[stopButton setEnabled:YES];
	[startButton setEnabled:NO];
}

- (IBAction) stopIt:(id)sender
{
	NSLog(@"stopping");
	[speechSynth stopSpeaking];
	[stopButton setEnabled:NO];
	[startButton setEnabled:YES];
}

- (int)numberOfRowsInTableview:(NSTableView *)tv 
{
	return [voiceList count];
}

-(id)tableView:(NSTableView *)tv
		objectValueForTableColumn:(NSTableColumn *)tableColumn
						row:(int)row
{
	NSString *v = [voiceList objectAtIndex:row];
	NSDictionary *dict = [NSSpeechSynthesizer attributesForVoice:v];
	return [dict objectForKey:NSVoiceName];
	//return v;
}

@end

AppController.h

#import <Cocoa/Cocoa.h>


@interface AppController : NSObject {
	IBOutlet NSTextField *textField;
	IBOutlet NSButton *stopButton;
	IBOutlet NSButton *startButton;
	IBOutlet NSTableView *tableView;
	NSArray *voiceList;
	NSSpeechSynthesizer *speechSynth;

}
- (IBAction)sayIt:(id)sender;
- (IBAction)stopIt:(id)sender;
@end

 

[kainjow]

numberOfRowsInTableView - that's a capital V

 

[duggram]

I am giantly impressed with Aaron Hillegass. Late yesterday I posted this thread here, sent Aaron a message through his Web site, and went to bed. Soon after that Aaron sent me a message with the solution. Of course I'm embarrassed. But I'm also thankful that Aaron is so good to do what he did. It's been a long time (8+ yrs) since I've done any programming. I just don't have my ways back yet.

Thank you Aaron for taking the time, and thank you kainjow too,
Doug