when I try to run [self setNeedsDisplay:YES] in my ViewController it crashes with unrecognized selector sent to instance... is there something I'm doing wrong?
I'm using:
-(void) drawRect: (CGRect)rect {
///code...
}
views:
37answers:
2
+2
A:
Try:
[self.view setNeedsDisplay:YES]
You can send setNeedsDisplay: message only to UIView based classes. You can effectively override drawRect: message only for UIView based classes.
bioffe
2010-10-21 03:42:21
Nope, same crash
Brodie
2010-10-21 03:47:16
show us some code
bioffe
2010-10-21 03:48:13
there's not much to show yet - I have tried moving [self setNeedsDisplay:YES] to viewDidLoad and the same thing happens. I get a "UIView may not respond to -setNeedsDisplay..." warning too. What I'm trying to do is make a simple drawing view. I have a bunch of CGPoints I need to draw.
Brodie
2010-10-21 03:54:29
just saw your edit - i think that may be the problem. This is a ViewController I am working with
Brodie
2010-10-21 03:56:58
well maybe not, because when i'm using self.view it still says, "UIView may not respond to -setNeedsDisplay"
Brodie
2010-10-21 03:59:04
UIView does not have a method setNeedsDisplay: that is from NSView/AppKit. UIView has no boolean flag, just message setNeedsDisplay (no parameter)
Jason Coco
2010-10-21 04:00:15
+4
A:
-setNeedsDisplay: is a method from NSView, UIView doesn't have the (pretty much useless) boolean flag. You must call setNeedsDisplay instead. So call (from your view controller):
[[self view] setNeedsDisplay];
No parameter...
Jason Coco
2010-10-21 03:59:25