Problem realeasing allocated objects - objective-c

Question

Crash occurs at [searchDict release]. If I switch order of the two latest lines it still crash on the latest line (now [searchArray release]). I'm quite new to Objective C and I guess I haven't got the alloc/release right... Help? :)
NSMutableDictionary *searchDict = [[NSMutableDictionary alloc] init];
NSMutableArray *searchArray = [[NSMutableArray alloc] init];
for(int i = 0; i < 2; i++) { // Run two times ("Favorites" and "All")
searchDict = [listOfItems objectAtIndex:i];
searchArray = [searchDict objectForKey:#"Entries"];
for (NSString *sTemp in searchArray) {
NSRange titleResultsRange = [sTemp rangeOfString:searchText options:NSCaseInsensitiveSearch];
if (titleResultsRange.length > 0)
[listOfItemsDynamic addObject:sTemp];
}
}
[searchArray release];
[searchDict release];

Answer 1

You allocate space and assign it to the variables:
NSMutableDictionary *searchDict = [[NSMutableDictionary alloc] init];
NSMutableArray *searchArray = [[NSMutableArray alloc] init];
But then you assign non locally-allocated data to them:
searchDict = [listOfItems objectAtIndex:i];
searchArray = [searchDict objectForKey:#"Entries"];
So basically, you don't need to allocate and release. Instead do something like this:
NSMutableDictionary *searchDict; // Just declartion, no allocation / init
NSMutableArray *searchArray; // Just declartion, no allocation / init
for(int i = 0; i < 2; i++) { // Run two times ("Favorites" and "All")
searchDict = [listOfItems objectAtIndex:i];
searchArray = [searchDict objectForKey:#"Entries"];
for (NSString *sTemp in searchArray) {
NSRange titleResultsRange = [sTemp rangeOfString:searchText options:NSCaseInsensitiveSearch];
if (titleResultsRange.length > 0)
[listOfItemsDynamic addObject:sTemp];
}
}
// No release needed here
If you are familiar with C, it is similar to:
char *pChar;
pChar = malloc(15); // allocate memory and assign to pChar
pChar = "Hello"; // assign new address to pChar
free(pChar); // Error here ;)