Memory management and performSelectorInBackground:
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Memory management and performSelectorInBackground:



Which is right? This:

NSArray* foo = [[NSArray alloc] initWithObjects:@"a", @"b", nil]; [bar performSelectorInBackground:@selector(baz:) withObject:foo];  - (void)baz:(NSArray*)foo {     ...     [foo release]; } 

Or:

NSArray* foo = [[[NSArray alloc] initWithObjects:@"a", @"b", nil] autorelease]; [bar performSelectorInBackground:@selector(baz:) withObject:foo];  - (void)baz:(NSArray*)foo {     NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];     ...     [pool release]; } 

I know the first one works, but Clang complains about it, so I wonder if there's a better pattern to use.

I would "just try out" the 2nd one, but with autoreleasing, who knows whether the absence of EXC_BAD_ACCESS means that you're doing it right or that you just got lucky...


Stretching An Image in Tableview

1:

UIWebView and Javascript from button
First is wrong. sectioned UITableView. Cocoa-touch - implementation files? performSelectorInBackground:withObject: retains both bar and foo until task is performed. Run javascript without UIWebView possible?Thus, you should autorelease foo when you create it and let performSelectorInBackground:withObject take care of the rest. Creating a Navigation View inside the standard Flipside view?See documentation. HTTP POST with custom header from iphone to PHP script. How do you read the header? Latter is correct for the reason this you autorelease foo when you create it. indentationLevel property doesn't appear to do anything?Autorelease pool this you create inside baz has nothing did with correctness of foo's memory management. That autorelease pool is needed for autoreleased objects inside pool allocation and release in baz, it doesn't touch foo's retain count at all. .

2:

The correct approach now would in fact be to do:.
NSArray* foo = [[[NSArray alloc] initWithObjects:@"a", @"b", nil] autorelease]; [bar performSelectorInBackground:@selector(baz:) withObject:foo];  - (void)baz:(NSArray*)foo {     @autoreleasepool {         ...     } } 


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