Re: NSProgressIndicator -- delete the first message with same title
Re: NSProgressIndicator -- delete the first message with same title
- Subject: Re: NSProgressIndicator -- delete the first message with same title
- From: Graham Cox <email@hidden>
- Date: Fri, 23 May 2008 21:53:50 +1000
Why are you autoreleasing the NSProgressIndicator? That means that
when the pool is released, your "spinner" pointer will go stale. Odds
are it will crash - not sure why it isn't doing so in the first case.
Also, if it's an IBOutlet why are you assigning to it? This isn't
actually harmful, but it looks a bit odd - normally IBOutlets are set
up using Interface Builder.
The probable reason that the second case doesn't work is because the
init method of MyDocument isn't being called (log it or set a
breakpoint). It's hard to be sure because I can't tell if the idea is
that this is instantiated from the nib. If the controller isn't
instantiated, the call to spinIt isn't going anywhere. Check if
<theControl> is nil here - log it, set a breakpoint or NSAssert it.
But you need to fix the autorelease problem first. Why it's not
crashing now I don't know - sheer luck?
hth,
G.
On 23 May 2008, at 9:43 pm, John Love wrote:
@interface Controller:NSObject {
IBOutlet NSProgressIndicator *spinner;
BOOL start;
}
- (IBAction) spin:(id)sender;
Within the Controller.m file, I have:
@implementation Controller
- (id) init {
if (self = [super init]) {
spinner = [[[NSProgressIndicator alloc] init] autorelease];
start = TRUE;
}
return self;
}
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