Hi Andreas,
You're not clearing "text" - you're clearing UILabel reference in your code:
self.nameLabel = nil;
If you wan't to reset just text then: self.nameLabel.text = @"";
(or any way you prefer depending on UI requirements),
With your current code you just sending message to nameLabel = which
is actually nil in your -(void)updateLabels method,
regards,
Peter Blazejewicz
On Tue, Feb 2, 2010 at 1:49 PM, Andreas Grosam <agro...@onlinehome.de> wrote:
> Hello,
>
> I have the following issue:
>
>
> There is a label "nameLabel" which text needs to be set from a certain field
> in the dictionary. I don't want to set the label's text property directly in
> the main thread's method - instead I use an NSString instance called "name"
> to store the text. This is an ivar, see property declaration below.
> Before the thread is finished and returns, it schedules the method
> -upadateLabels on the main thread which finally sets the label's text
> property (shown below).
>
>
>
>
> - (void) updateLabels
> {
> self.nameLabel.text = self.name;
> }
>
>
>
> One *important* observations is here:
> Before generating the URL request, I actually need a parameter which is asked
> from the user via an interface.
> When the user starts to edit the input (a UITextField) the view controller
> gets notified through a method, shown below.
> The purpose of this method is to clear the previous results.
>
> ** IFF I do not set the text property to nil, the NSString instance "name"
> remains valid. So, it seems, that the string object will be *shared* - but
> not copied. Hence the auto release pool does not dealloc the string. The
> label's text property is declared as: @property(nonatomic, copy) NSString*
> text
> This looks strange to me. Any thoughts?
>
>
> - (void)textFieldDidBeginEditing:(UITextField *)textField
> {
> // User entered editing: clear labels:
> self.nameLabel = nil; // if uncommented, the ivar "name" remains valid
> }
>
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