On Oct 27, 2008, at 3:32 AM, Trygve Inda wrote:
How can I bind a button title to a Boolean but have a custom title
for each
state? For example, I have a BOOL isRunning, if YES, my button
should read
"Stop Running" else "Start Running".
I can't really do this with an alternate title since when the
button is
pushed and temporarily held down, the title should not change as it
is a
normal push "pill" button.
How about something like this? Whenever isRunning changes, it
triggers an update of the button's title.
+ (void) initialize
{
...
[self setKeys:[NSArray arrayWithObject:@"isRunning"]
triggerChangeNotificationsForDependentKey:@"buttonTitle"];
...
}
- (NSString*) buttonTitle
{
return [self isRunning] ? @"Stop Running" : @"Start Running";
}
- (BOOL) isRunning
{
return _isRunning;
}
- (void) setIsRunning:(BOOL)isRunning
{
[self willChangeValueForKey:@"isRunning"];
_isRunning = isRunning;
[self didChangeValueForKey:@"isRunning"];
}
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