iPhone 上的 EXC_BAD_ACCESS

Question

我有以下内容：

Class Number1

.h 文件：

myAudiCiviliteInputViewController *civiliteInputViewController;

.m 文件：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    [tableViewEtape4 deselectRowAtIndexPath:indexPath animated:NO];

    civiliteInputViewController = [[myAudiCiviliteInputViewController alloc] init];
    [self.navigationController pushViewController:civiliteInputViewController animated:YES];
    [civiliteInputViewController release];

    UIButton* customView = [UIButton buttonWithType: UIButtonTypeInfoLight];
    [customView setFrame:CGRectMake(0, 0, 60, 31)];
    [customView setImage:[UIImage imageNamed:@"nc_btn_ok.png"] forState:UIControlStateNormal];
    [customView addTarget:self action:@selector(okPressed) forControlEvents:UIControlEventTouchDown];
    UIBarButtonItem *envoyerButton = [[UIBarButtonItem alloc] initWithCustomView: customView];
    [self.navigationController.navigationBar.topItem setRightBarButtonItem:envoyerButton];
    [customView release];

}

-(void) okPressed{

        self.civiliteString= civiliteInputViewController.civiliteInputString;
        civiliteLabel.text = self.civiliteString;

        [self.navigationController popViewControllerAnimated:YES];
}

当我单击 tableView 时，我移动到 Number 2 类。

Class Number2 myAudiCiviliteInputViewController

@synthesize civiliteInputString;

- (void)dealloc
{
    [civiliteInputString release];
    [tabelViewCivilite release];
    [tableViewArray release];
    [super dealloc];
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.

    tableViewArray = [[NSMutableArray alloc] initWithObjects:@"Madame", @"Mademoiselle", @"Monsieur", nil];

}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"CellRecherchePartenaires"];

    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:@"CellRecherchePartenaires"] autorelease];

                    }
    // Set up the cell...
    [[cell textLabel] setText: [tableViewArray objectAtIndex:indexPath.row]] ;

    return cell;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    [tabelViewCivilite deselectRowAtIndexPath:indexPath animated:YES];
    UITableViewCell *selectedCell = [tableView cellForRowAtIndexPath:indexPath];
    self.civiliteInputString = selectedCell.textLabel.text;

    [tableView  reloadData];

}

当我从 Class Number1 转到 Class Number2 时，它可以工作。当我从Class Number2返回到Class Number1时，我在Class Number2中得到EXC_BAD_ACCESS，在这一行：

[super dealloc];

Any想法 为什么？

Answer 1

看看你的代码。 UIButton* customView 是自动释放的。删除-> [自定义视图发布]

UIButton* customView = [UIButton buttonWithType: UIButtonTypeInfoLight];
[customView setFrame:CGRectMake(0, 0, 60, 31)];
[customView setImage:[UIImage imageNamed:@"nc_btn_ok.png"] forState:UIControlStateNormal];
[customView addTarget:self action:@selector(okPressed) forControlEvents:UIControlEventTouchDown];
UIBarButtonItem *envoyerButton = [[UIBarButtonItem alloc] initWithCustomView: customView];
[self.navigationController.navigationBar.topItem setRightBarButtonItem:envoyerButton];
[customView release]; // Remove this line

Answer 2

1. 您不应该release customView，因为它是自动释放的，删除：[customView release];

2. 你应该release envoyerButton，添加： [envoyerButton release];

Answer 3

.h 文件

myAudiCiviliteInputViewController *civiliteInputViewController;

.m 文件

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{

[tableViewEtape4 deselectRowAtIndexPath:indexPath animated:NO];
civiliteInputViewController = [[myAudiCiviliteInputViewController alloc] init];
[self.navigationController pushViewController:civiliteInputViewController animated:YES];
[civiliteInputViewController release];

UIButton* customView = [UIButton buttonWithType: UIButtonTypeInfoLight]; // Autoreleasing object 
[customView setFrame:CGRectMake(0, 0, 60, 31)];
[customView setImage:[UIImage imageNamed:@"nc_btn_ok.png"] forState:UIControlStateNormal];
[customView addTarget:self action:@selector(okPressed) forControlEvents:UIControlEventTouchDown];
UIBarButtonItem *envoyerButton = [[UIBarButtonItem alloc] initWithCustomView: customView];
[self.navigationController.navigationBar.topItem setRightBarButtonItem:envoyerButton];
[envoyerButton release]; // You should release this object
}

-(void) okPressed
{

    self.civiliteString= civiliteInputViewController.civiliteInputString;
    civiliteLabel.text = self.civiliteString;

    [self.navigationController popViewControllerAnimated:YES];
 }