I still cannot figure this out, so any help would be kind appreciated.
I followed the debugging steps from
here<http://www.corbinstreehouse.com/blog/index.php/2007/10/instruments-on-leopard-how-to-debug-those-random-crashes-in-your-cocoa-app/>and
here is what I obtained:
Code except:
.h file:
...
@interface DetailViewController : UIViewController <UIWebViewDelegate>
...
.m file:
- (void) webViewDidFinishLoad:(UIWebView *)sender {
NSLog(@"Enter webViewDidFinishLoad");
if(saveView==YES){
//add a new page to the scroll view
NSLog(@"save view for page %d", crtPage);
NSString* htmlTemplate = @"<html><body><div align='justify'><font
face='American Typewriter' color='black'
size='2'>@text</font></div></body></html>";
NSString * htmlContentTemp = [aChapter.content substringWithRange:
NSMakeRange(startPos,crtPos-startPos)];
htmlContentTemp = [htmlContentTemp stringByReplacingOccurrencesOfString:@"~"
withString:@"<br/> "];
htmlContentTemp = [htmlTemplate stringByReplacingOccurrencesOfString:
@"@text" withString:htmlContentTemp];
UIWebView* newWebView = [[UIWebView alloc] initWithFrame:CGRectMake(5,5,310
,400)];
[newWebView loadHTMLString:htmlContentTemp baseURL:[NSURL URLWithString:@""
]];
[scrollView addSubview:newWebView];
[newWebView release];
}
}
The log shows me that:
12/09/09 4:22:42 PM alice[1572] *** -[CFString _createSubstringWithRange:]:
message sent to deallocated instance *0x7495ac0*
that corresponds to:
# Category Event Type Timestamp Address Size Responsible Library Responsible
Caller
342 CFString CFRelease 00:20.347 *0x7495ac0* *0* UIKit *-[UIWebDocumentView
loadHTMLString:baseURL:*]
So making a long story short,
when I launch
*[newWebView **loadHTMLString**:htmlContentTemp **baseURL**:[**NSURL** **
URLWithString**:**@""**]];*
the string *htmlContentTemp* gets deallocated before the *UIWebView* loaded
the content
Any suggestion how I can prevent that?
Thanks a lot,
Dragos
On Fri, Sep 11, 2009 at 10:10 PM, Andrew Farmer <andf...@gmail.com> wrote:
> On 11 Sep 2009, at 06:59, Dragos Ionel wrote:
>
>> Is the following code supposed to run correctly?
>>
>> NSString* *htmlContent* = ...;// very long html content
>>
>> UIWebView* webView = [[UIWebView alloc] initWithFrame:...];
>>
>> [webView loadHTMLString:*htmlContent* baseURL:...]; //assume this will
>> take
>> some time
>>
>> *htmlContent* = @"different text";
>>
>> My question is if the memory space for *htmlContent* will be preserved
>> until
>> the webView finishes loading it, considering the fact that it will run in
>> a
>> different thread.
>>
>
> Assigning a new value to a NSString * pointer does not mutate the original
> string.
>
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