Strange behaviour of NSString in NSView
- by Mee
Trying to create a Skat-Game, I encountered the following problem:
isBidding is a Boolean value indicationg, the program is in a certain state,
[desk selected] is a method calling returning the current selected player,
chatStrings consists of dictionaries, saving strings with the player, who typed, and what he typed
- (void)drawRect:(NSRect)rect
{
NSMutableDictionary * attributes = [NSMutableDictionary dictionary];
[attributes setObject:[NSFont fontWithName:playerFont size:playerFontSize] forKey:NSFontAttributeName];
[attributes setObject:playerFontColor forKey:NSForegroundColorAttributeName];
[[NSString stringWithFormat:@"Player %i",[desk selected] + 1]drawInRect:playerStringRect withAttributes:attributes];
if (isBidding)
{
[attributes setObject:[NSFont fontWithName:chatFont size:chatFontSize] forKey:NSFontAttributeName];
[attributes setObject:chatFontColor forKey:NSForegroundColorAttributeName];
int i;
for (i = 0; i < [chatStrings count]; i++, yProgress -= 20)
{
if (isBidding)
[[NSString stringWithFormat:@"Player %i bids: %@",[[[chatStrings objectAtIndex:i]valueForKey:@"Player"]intValue],
[[chatStrings objectAtIndex:i]valueForKey:@"String"]]
drawAtPoint:NSMakePoint([self bounds].origin.x, yProgress) withAttributes:attributes];
else
[[NSString stringWithFormat:@"Player %i: %@",[[[chatStrings objectAtIndex:i]valueForKey:@"Player"]intValue],
[[chatStrings objectAtIndex:i]valueForKey:@"String"]]
drawAtPoint:NSMakePoint([self bounds].origin.x, yProgress) withAttributes:attributes];
}
if (isBidding)
[[NSString stringWithFormat:@"Player %i bids: %@",[desk selected] + 1, displayString]
drawAtPoint:NSMakePoint([self bounds].origin.x, yProgress) withAttributes:attributes];
else
[[NSString stringWithFormat:@"Player %i: %@",[desk selected] + 1, displayString]
drawAtPoint:NSMakePoint([self bounds].origin.x, yProgress) withAttributes:attributes];
yProgress = chatFontBegin;
}
}
This is the part determining the string's content, the string is contributed by an [event characters] method.
-(void)displayChatString:(NSString *)string
{
displayString = [displayString stringByAppendingString:string];
[self setNeedsDisplay:YES];
}
The problem if have is this:
when typing in more than two letters the view displays NSRectSet{{{471, 574},{500, 192}}}
and returns no more discription when I try to print it.
then I get an EXC_BAD_ACCESS message, though I have not released it (as far as I can see) I also created the string with alloc and init, so I cannot be in the autorelease pool.
I also tried to watch the process when it changes with the debugger, but I couldn't find any responsible code.
As you can see I am still a beginner in Cocoa (and programming in general), so I would be really happy if somebody would help me with this.
