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我有一个有趣的问题，我似乎无法找出它发生的原因，可能是我忽略的一些小问题。

我有一个 UITableView 并且在我的 didselectrowatindex 路径中导航到一个新视图，然后导航到下一个视图并弹出两个视图以返回第一个视图，然后应用程序因 EXC_BAD_ACCESS 而崩溃

所以我使用了instruments和NSZombie，在didselectrowatindexpath中找到了一个malloc，但我不知道为什么

这是我的代码：

if([workflowswithdirectories count] == 0)
{
    WorkflowViewController *aWorkFlow = [[WorkflowViewController alloc] init];
    MenuObject *obj = [workflownames objectAtIndex:[indexPath row]];
    aWorkFlow.heading = obj.name;
    aWorkFlow.workId = obj.workflowid;
    aWorkFlow.siteId = obj.siteid;
    aWorkFlow.item = obj;
    [self.navigationController pushViewController:aWorkFlow animated:YES];

}
else if([workflownames count] == 0)
{
    WorkflowListViewController *work = [[WorkflowListViewController alloc] init];
    work.siteId = self.siteId;
    MenuObject *obj = [workflowswithdirectories objectAtIndex:[indexPath row]];
    work.menu = obj.next;
    work.heading = obj.name;
    [self.navigationController pushViewController:work animated:YES];
}
else
{
    if([indexPath section] == 0)
    {
        WorkflowListViewController *work = [[WorkflowListViewController alloc] init];
        work.siteId = self.siteId;
        MenuObject *obj = [workflowswithdirectories objectAtIndex:[indexPath row]];
        work.menu = obj.next;
        work.heading = obj.name;
        [self.navigationController pushViewController:work animated:YES];
    }
    else
    {
        WorkflowViewController *aWorkFlow = [[WorkflowViewController alloc] init];
        MenuObject *obj = [workflownames objectAtIndex:[indexPath row]];
        aWorkFlow.heading = obj.name;
        aWorkFlow.workId = obj.workflowid;
        aWorkFlow.siteId = obj.siteid;
        aWorkFlow.item = obj;
        [self.navigationController pushViewController:aWorkFlow animated:YES];  //Malloc is on this line
    }
}  
[tableView deselectRowAtIndexPath:indexPath animated:YES];

编辑：

我忘了提到的是，在某些情况下，我将同一类的另一个推送到导航控制器上，但只有在转到 WorkflowViewController 然后到下一个视图控制器然后返回两次时才会引发异常

4

1 回答 1

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为了内存和效率，让所有 UIViewControllers 强属性（带有支持 iVar）以保证它们保持足够长的时间来做任何有用的事情。

于 2012-03-26T21:02:36.880 回答