Working through exercises in "Cocoa Programming for Mac OS X" - I'm stumped
- by Zigrivers
I've been working through the exercises in a book recommended here on stackoverflow, however I've run into a problem and after three days of banging my head on the wall, I think I need some help.
I'm working through the "Speakline" exercise where we add a TableView to the interface and the table will display the "voices" that you can choose for the text to speech aspect of the program.
I am having two problems that I can't seem to get to the bottom of:
I get the following error: * Illegal NSTableView data source (). Must implement numberOfRowsInTableView: and tableView:objectValueForTableColumn:row:
The tableView that is supposed to display the voices comes up blank
I have a feeling that both of these problems are related.
I'm including my interface code here:
#import <Cocoa/Cocoa.h>
@interface AppController : NSObject <NSSpeechSynthesizerDelegate, NSTableViewDelegate>
{
IBOutlet NSTextField *textField;
NSSpeechSynthesizer *speechSynth;
IBOutlet NSButton *stopButton;
IBOutlet NSButton *startButton;
IBOutlet NSTableView *tableView;
NSArray *voiceList;
}
- (IBAction)sayIt:(id)sender;
- (IBAction)stopIt:(id)sender;
@end
And my implementation code here:
#import "AppController.h"
@implementation AppController
- (id)init
{
[super init];
//Log to help me understand what is happening
NSLog(@"init");
speechSynth = [[NSSpeechSynthesizer alloc] initWithVoice:nil];
[speechSynth setDelegate:self];
voiceList = [[NSSpeechSynthesizer availableVoices] retain];
return self;
}
- (IBAction)sayIt:(id)sender
{
NSString *string = [[textField stringValue] stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
//Is the string zero-length?
if([string length] == 0) {
NSLog(@"String from %@ is a string with a length of %d.", textField, [string length]);
[speechSynth startSpeakingString:@"Please enter a phrase first."];
}
[speechSynth startSpeakingString:string];
NSLog(@"Started to say: %@", string);
[stopButton setEnabled:YES];
[startButton setEnabled:NO];
}
- (IBAction)stopIt:(id)sender
{
NSLog(@"Stopping...");
[speechSynth stopSpeaking];
}
- (void) speechSynthesizer:(NSSpeechSynthesizer *)sender didFinishSpeaking:(BOOL)complete
{
NSLog(@"Complete = %d", complete);
[stopButton setEnabled:NO];
[startButton setEnabled:YES];
}
- (NSInteger)numberOfRowsInTableView:(NSTableView *)aTableView
{
return [voiceList count];
}
- (id)tableView: (NSTableView *)tv objecValueForTableColumn: (NSTableColumn *)tableColumn
row:(NSInteger)row
{
NSString *v = [voiceList objectAtIndex:row];
NSLog(@"v = %@",v);
NSDictionary *dict = [NSSpeechSynthesizer attributesForVoice:v];
return [dict objectForKey:NSVoiceName];
}
/*
- (BOOL)respondsToSelector:(SEL)aSelector
{
NSString *methodName = NSStringFromSelector(aSelector);
NSLog(@"respondsToSelector: %@", methodName);
return [super respondsToSelector:aSelector];
}
*/
@end
Hopefully, you guys can see something obvious that I've missed.
Thank you!
