在这种情况下我需要释放 NSMutableDictionary 吗？
在这种情况下我需要释放 dictCellCollectionIndividual 吗？
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
... ...
... ...
... ...
// Local declaration of dictCellCollectionIndividual
NSMutableDictionary *dictCellCollectionIndividual;
// Copy the specific dictionary from dictCellCollection to dictCellCollectionIndividual. dict CellCollection is declared elsewhere.
dictCellCollectionIndividual = [dictCellCollection objectForKey:[NSString stringWithFormat:@"%@", [arrayCellCollectionOrder objectAtIndex:indexPath.row]]];
... ...
... ...
... ...
// Do I need to release?
[dictCellCollectionIndividual release];
return cell;
？
使用 objectForKey 不会增加保留计数吗 我不需要释放它吗？
提前致谢。
Do I need to release dictCellCollectionIndividual in this case?
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
... ...
... ...
... ...
// Local declaration of dictCellCollectionIndividual
NSMutableDictionary *dictCellCollectionIndividual;
// Copy the specific dictionary from dictCellCollection to dictCellCollectionIndividual. dict CellCollection is declared elsewhere.
dictCellCollectionIndividual = [dictCellCollection objectForKey:[NSString stringWithFormat:@"%@", [arrayCellCollectionOrder objectAtIndex:indexPath.row]]];
... ...
... ...
... ...
// Do I need to release?
[dictCellCollectionIndividual release];
return cell;
}
Doesn't using objectForKey increase the retain count? Don't I have to release it?
Thanks in advance.
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不，它只是返回一个指向字典中保存的对象的指针；如果您打算在任何时间段内保留该对象，则需要获得它的所有权，以便在
NSDictionary被释放的同时该对象将保持有效。在这种情况下，您需要确保在使用完对象后release或autorelease该对象。如果您打算仅将其用作临时值（例如，作为NSLog调用的参数），则可能没有必要保留该对象，因此也没有必要释放它。No, it simply returns a pointer to the object held within the dictionary; if you plan to keep the object around for any period of time, you need to take ownership of it, so that the object will remain valid if
NSDictionaryis deallocated in the meantime. In this case, you'll need to make sure to eitherreleaseorautoreleasethe object when you're done with it. If you're planning to use it only as a temporary value (say, as an argument to anNSLogcall), it's probably unnecessary to retain the object, and therefore unnecessary to release it.