Hi all,
I have two functions increase and decrease which control the number of sides of
a polygon. I want to call a - (void)function that disables the buttons if the
current number of sides are equal to the maximum number of sides.
1) One problem is that "button.enabled=YES/NO" does not get called. If I put
this line into the decrease/increase function it works fine. But I don't want
to copy-paste the code, so I thought I can put this into my updateInterface
function.
2) Another problem is that somehow the function "cannot" change the ivars
values.. Again, if I put the code in the increase, decrease functions I have no
problems.
3) And lastly I'm not sure if I'm doing it "correctly". As updateInterface is a
method declared in my controller class, polygon cannot call it. I use an
"Controller" object to invoke the updateInterface function. Due to the fact
that the function must change some ivars, I cannot use a class function... I
think it could be the reason why it doesn't work the way it should, but at this
point I don't see why...
I hope you can help me understand the issue here. I'm new to mac programming.
CODE:
- (void)awakeFromNib{
cont = [[Controller alloc] init];
polygon = [[PolygonShape alloc] initWithNumberOfSides:5
minimumNumberOfSides:3 maximumNumberOfSides:12];
numberOfSidesLabel.text=[NSString stringWithFormat:@"%d %d
%d",polygon.numberOfSides, polygon.minimumNumberOfSides,
polygon.maximumNumberOfSides];
polygonAngle.text=[NSString stringWithFormat:@"%f %f",
polygon.angleInDegrees, polygon.angleInRadians];
polygonName.text=[NSString stringWithFormat:@"%@", polygon.name];
}
- (IBAction)decrease{
polygon.numberOfSides-=1;
[cont updateInterface:polygon];
}
- (IBAction)increase{
polygon.numberOfSides+=1;
[cont updateInterface:polygon];
}
- (void)updateInterface:(id)sender{
numberOfSidesLabel.text=[NSString stringWithFormat:@"%d %d
%d",polygon.numberOfSides, polygon.minimumNumberOfSides,
polygon.maximumNumberOfSides];
polygonAngle.text=[NSString stringWithFormat:@"%f %f",
polygon.angleInDegrees, polygon.angleInRadians];
polygonName.text=[NSString stringWithFormat:@"%@", polygon.name];
if ([sender numberOfSides]==[sender maximumNumberOfSides]) {
[increaseButton setEnabled:NO];
increaseButton.enabled=NO;
}else if ([sender numberOfSides]==[sender minimumNumberOfSides]) {
decreaseButton.enabled=NO;
}else {
increaseButton.enabled=YES;
decreaseButton.enabled=YES;
}
}
THANKS A LOT!
-M_______________________________________________
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