iphone - 这段代码是否有可能在内存方面引起任何问题？

Question

我想我隐藏工具栏感到紧张。我是否还需要进行其他取消分配？

 - (void)viewWillAppear:(BOOL)animated {
        [super viewWillAppear:animated];


        self.navigationItem.title = @"Add Recipients";

        self.navigationController.toolbarHidden=NO;


        UIBarButtonItem            *localItem;
        UIBarButtonItem            *remoteItem;


        localItem = [[ UIBarButtonItem alloc ] initWithTitle: @"Local"
                                                       style: UIBarButtonItemStyleBordered
                                                      target: self
                                                      action: @selector( localRecipients: ) ];



        remoteItem = [[ UIBarButtonItem alloc ] initWithTitle: @"Remote"
                                                        style: UIBarButtonItemStyleBordered
                                                       target: self
                                                       action: @selector( remoteRecipients: ) ];


        self.toolbarItems = [ NSArray arrayWithObjects: localItem,remoteItem,nil ];

        [localItem release];
        [remoteItem release];


    }


    - (void)viewWillDisappear:(BOOL)animated {
        [super viewWillDisappear:animated];

        self.navigationController.toolbarHidden=YES;



}

Answer 1

您不需要进行重新分配，因为您已经通过释放这两个UIBarButtonItem来保护代码中的内容。

如果您保留toolbarItems，请尝试以下代码。

self.toolbarItems = nil ;
self.toolbarItems = [ NSArray arrayWithObjects: localItem,remoteItem,nil ];