iOS NSDictionary 传递函数

Question

我有一个名为 SecondViewController 的 View Controller ，当用户选择要阅读的文章时，我想导航到 ThirdViewController 并传递带有文章数据的 NSDictionary。

- (void) touchButtonBlock:(NSInteger) select
{

    NSLog(@"touchButtonBlock");
    NSDictionary *dict;
    switch (select) {
        case 0:
        {
            NSMutableDictionary *tmpDict = [[NSMutableDictionary alloc] init];
            NSMutableDictionary *val = [[NSMutableDictionary alloc] init];
            [val setObject:@"article360.html" forKey:@"page"];
            [val setObject:@"img.png" forKey:@"img"];
            [val setObject:@"art1" forKey:@"name"];

            [tmpDict setObject:val forKey:[NSNumber numberWithInt:0]];

            val = [[NSMutableDictionary alloc] init];
            [val setObject:@"article360.html" forKey:@"page"];
            [val setObject:@"img.png" forKey:@"img"];
            [val setObject:@"art2" forKey:@"name"];

            [tmpDict setObject:val forKey:[NSNumber numberWithInt:1]];

            dict = [NSDictionary dictionaryWithDictionary:tmpDict];

            //[tmpDict release];
            //[val release];
            break;
        }
    NSDictionary *immDict = [NSDictionary dictionaryWithDictionary:dict];

    ArticleSelectListViewController *selectorView = [[ArticleSelectListViewController alloc] initWithArticlesData:immDict];
    [self.navigationController pushViewController:selectorView animated:YES];
    [selectorView release];
}

这里我给 NSDicitionary 赋值:

- (id)initWithArticlesData:(NSDictionary *)data
{
    self = [super initWithNibName:nil bundle:nil];
    if (self)
    {
        articles = data;

    ...
}

但在用户交互文章变量之后调用的其他函数中，变量似乎不正确 - 它不包含我的数据。

我哪里出错了？

Answer 1

复制字典然后赋值。

 - (id)initWithArticlesData:(NSDictionary *)data
    {
        self = [super initWithNibName:nil bundle:nil];
        if (self)
        {
            articles = [data copy];

        ...
    }