Cocoa touch 删除子视图时的CALayer僵尸

我有一个详细的视图。其中一个值是指向图像的URL

如果URL不是nil，它将创建一个临时视图以显示进度条，并在后台下载带有

NSURLConnection

的图像。准备好后，我删除进度视图，创建并添加一个新的图像视图，用foto替换旧的进度视图

当我尝试使用

[[self.view viewWithTag:1100]removeFromSuperview]删除视图时，我总是获得EXC\u BAD\u访问权限。我已经检查了每一行代码，无法猜测错误在哪里，所以可能我遗漏了一些规则

仪器为我提供了以下信息：

#   Address Category    Event Type  RefCt   Timestamp   Size    Responsible Library Responsible Caller
0   0x5ded960   CALayer Malloc  1   00:10.772.601   48  UIKit   -[UIView _createLayerWithFrame:]
1   0x5ded960   CALayer Zombie  -1  00:14.720.076   0   QuartzCore  -[CALayerArray copyWithZone:]
#地址类别事件类型RefCt时间戳大小责任库责任调用方
0 0x5ded960 CALayer Malloc 1 00:10.772.601 48 UIKit-[UIView\u createLayerWithFrame:]
1 0x5ded960 CALayer僵尸-1 00:14.720.076 0夸脱核心-[CALayer阵列copyWithZone:]
这是代码：

- (void) loadDataIntoView
{

    // Create the View without the photo
    self.nombreTextView.text = self.evento.nombre;
    self.fechaTextField.text = @"Del 12 de Junio de 2010 al 3 de Octubre de 2011";

    // Check is a photo url exists

    if (self.evento.foto) {
        // Download the photo in background
        self.fotoConnection = [NSURLConnection connectionWithRequest:
                               [NSURLRequest requestWithURL:self.evento.foto] 
                                                            delegate:self];
        // Erros are handled by the delegate methods
        // This error should never happen
        if (!self.fotoConnection) {
            NSLog(@"Error creating connection");
            exit(0);
        }
        // Create the entradilla View
        UITextView *entradillaTextView = [[UITextView alloc] init];
        entradillaTextView.frame = CGRectMake(26, 216, 280, 145);
        entradillaTextView.text = self.evento.entradilla;
        entradillaTextView.tag = 1000;
        [self.view addSubview:entradillaTextView];
        [entradillaTextView release];

        // Create the progess View
        UIView *progressView = [[UIView alloc] initWithFrame:CGRectMake(26, 76, 270, 130)];
        progressView.tag = 1100;

        // Create progressView Label
        UILabel *legendLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 270, 20)];
        legendLabel.text = @"descargando fotografía";
        legendLabel.font = [UIFont systemFontOfSize:11];
        legendLabel.textColor = [UIColor lightGrayColor];
        legendLabel.textAlignment = UITextAlignmentCenter;

        // Create progressView progressBar
        UIProgressView *auxView = [[UIProgressView alloc] initWithFrame:CGRectMake(35, 20, 200, 40)];
        self.progressBar = auxView;
        [auxView release];
        self.progressBar.tag = 1200;

        [progressView addSubview:legendLabel];
        [legendLabel release];

        [progressView addSubview:progressBar];
        [progressBar release];

        [self.view addSubview:progressView];
        [progressView release];

    } else {
        // Create the entradilla View without any foto view space on top
        UITextView *entradillaTextView = [[UITextView alloc] init];
        entradillaTextView.frame = CGRectMake(26, 76, 280, 283);
        entradillaTextView.text = self.evento.entradilla;
        entradillaTextView.tag = 1000;
        [self.view addSubview:entradillaTextView];
        [entradillaTextView release];
    }

    // Configure the ToolBar

    // Create the favourites button if evento is not favourite
    UIBarButtonItem *favouritesButton;
    if (!self.evento.isFavourite) {
        NSString *imagePath = [[NSBundle mainBundle] pathForResource:@"29-heart" ofType:@"png"];
        UIImage *addFavouriteImage = [UIImage imageWithContentsOfFile:imagePath];
        favouritesButton = [[UIBarButtonItem alloc] initWithImage:addFavouriteImage style:UIBarButtonItemStylePlain target:self action:@selector(addFavoritosButtonPressed)];
        //        favouritesButton = [[UIBarButtonItem alloc] initWithTitle:@"+ Favoritos" style:UIBarButtonItemStyleBordered target:self action:@selector(addFavoritosButtonPressed)];
    } else {
        favouritesButton = [[UIBarButtonItem alloc] initWithTitle:@"- Favoritos" style:UIBarButtonItemStyleBordered target:self action:@selector(removeFavoritosButtonPressed)];
    }
    // Create the Web buttom
    UIBarButtonItem *webButton = [[UIBarButtonItem alloc] initWithTitle:@"Mostrar Web" style:UIBarButtonItemStyleBordered target:self action:@selector(webButtonPressed)];

    // Create the Map buttom
    UIBarButtonItem *mapButton = [[UIBarButtonItem alloc] initWithTitle:@"Mostrar Mapa" style:UIBarButtonItemStyleBordered target:self action:@selector(mapButtonPressed)];
    self.toolbarItems = [NSArray arrayWithObjects:favouritesButton, webButton, mapButton, nil];
    [favouritesButton release];
    [webButton release];
    [mapButton release];    

}

#pragma Mark -
#pragma Mark NSURLConnection Delegate

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
    NSHTTPURLResponse *resp = (NSHTTPURLResponse *) response;
    if ((resp.statusCode >= 200) && (resp.statusCode < 300)) {
        // OK status Code
        // Prepare the temp array
        self.fotoData = [NSMutableData data];

        // Get the lenght of data to download for progress bar
        self.dataSizeToDownload = resp.expectedContentLength;
        self.dataSizeDownloaded = 0;
    } else {
        // Wrong status Code
        self.fotoData = nil;
        self.progressBar = nil;
        [connection cancel];
        self.fotoConnection = nil;

        // Reconfigure the View
        // Remove the old entradilla
        [[self.view viewWithTag:1000] removeFromSuperview];
        // Create the repositioned entradilla View
        UITextView *entradillaTextView = [[UITextView alloc] init];
        entradillaTextView.frame = CGRectMake(26, 76, 280, 283);
        entradillaTextView.text = self.evento.entradilla;
        entradillaTextView.tag = 1000;
        [self.view addSubview:entradillaTextView];
        [entradillaTextView release];

    }
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    [self.fotoData appendData:data];

    self.dataSizeDownloaded = self.dataSizeDownloaded + (float)data.length;
    if ( self.dataSizeToDownload != 0) {
        float prog = (float)( self.dataSizeDownloaded / self.dataSizeToDownload );
        [self performSelectorOnMainThread:@selector(updateProgressBarWithValue:) withObject:[NSNumber numberWithFloat:prog] waitUntilDone:NO];
    }    
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
    // If no error create a new View and Reload the data
    self.fotoConnection = nil;
    if (self.fotoData) {

        self.progressBar = nil;

// !!!!!!!!! THIS IS THE EXC_BAD_ACCESS !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
        [[self.view viewWithTag:1100] removeFromSuperview];

        UIImageView *fotoImageView = [[UIImageView alloc] initWithImage:
                                      [UIImage imageWithData:self.fotoData]];            
        fotoImageView.frame = CGRectMake( 26, 76, 270, 130);
        fotoImageView.contentMode = UIViewContentModeScaleAspectFit;
        [self.view addSubview:fotoImageView];


        [fotoImageView release];        
        [self.view reloadInputViews];


    } else {
        // Error downloading foto
    }

}

- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
    self.fotoConnection = nil;
    self.fotoData = nil;
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:error.description message:nil delegate:nil cancelButtonTitle:@"aceptar" otherButtonTitles:nil];
    [alert show];
    [alert release];
}


- (void) updateProgressBarWithValue:(NSNumber *)value
{
    float progress = [value floatValue];
    NSLog(@"Progress %f", progress);
    //self.progressBar.progress = progress;
}

-（void）加载数据到视图
{
//创建没有照片的视图
self.nombreTextView.text=self.evento.nombre；
self.fechaTextField.text=@“2010年6月12日至2011年8月3日”；
//检查是否存在照片url
if（self.evento.foto）{
//下载背景图片
self.fotoConnection=[NSURLConnection connectionWithRequest:
[nsurlRequestWithURL:self.evento.foto]
代表：自我]；
//错误由委托方法处理
//这种错误永远不会发生
if（！self.fotoConnection）{
NSLog（@“创建连接时出错”）；
出口（0）；
}
//创建Dilla视图
UITextView*EntradilatextView=[[UITextView alloc]init]；
entradilatextview.frame=CGRectMake（26216280145）；
entradilatextview.text=self.evento.entradilla；
entradilatextview.tag=1000；
[self.view addSubview:entradilatextview]；
[EntradilatextView发布]；
//创建进程视图
UIView*progressView=[[UIView alloc]initWithFrame:CGRectMake（26,76,270,130）]；
progressView.tag=1100；
//创建progressView标签
UILabel*legendLabel=[[UILabel alloc]initWithFrame:CGRectMake（0,0,270,20）]；
legendLabel.text=@“descargando fotografía”；
legendLabel.font=[UIFont systemFontOfSize:11]；
legendLabel.textColor=[UIColor lightGrayColor]；
legendLabel.textAlignment=UITextAlignmentCenter；
//创建progressView进度条
UIProgressView*auxView=[[UIProgressView alloc]initWithFrame:CGRectMake（35,20,200,40）]；
self.progressBar=auxView；
[auxView发布]；
self.progressBar.tag=1200；
[progressView添加子视图：legendLabel]；
[legendLabel发布]；
[progressView添加子视图：progressBar]；
[进度条释放]；
[self.view addSubview:progressView]；
[progressView发布]；
}否则{
//创建没有任何foto视图空间的entradilla视图
UITextView*EntradilatextView=[[UITextView alloc]init]；
entradilatextview.frame=CGRectMake（26,76,280,283）；
entradilatextview.text=self.evento.entradilla；
entradilatextview.tag=1000；
[self.view addSubview:entradilatextview]；
[EntradilatextView发布]；
}
//配置工具栏
//如果evento不是收藏夹，则创建收藏夹按钮
UIBAButtonim*最喜欢的按钮；
如果（！self.evento.isfavorite）{
NSString*imagePath=[[NSBundle mainBundle]pathForResource:@“29心脏”类型：@“png”]；
UIImage*AddFavoriteImage=[UIImage imageWithContentsOfFile:imagePath]；
FavoriteSButton=[[UIBarButtonItem alloc]initWithImage:AddFavoriteImage样式：UIBarButtonItemStylePlain目标：自我操作：@selector（addFavoritosButtonPressed）]；
//FavoriteSButton=[[UIBarButtonItem alloc]initWithTitle:@“+Favoritos”样式：UIBarbuttonItemStyleBorded目标：自我操作：@selector（addFavoritosButtonPressed）]；
}否则{
FavoriteSButton=[[UIBarButtonItem alloc]initWithTitle:@“-Favoritos”样式：UIBarButtonItemStyleBordered目标：自我操作：@selector（removeFavoritosButtonPressed）]；
}
//创建Web按钮
UIBarButtonItem*webButton=[[UIBarButtonItem alloc]initWithTitle:@“Mostrar Web”样式：UIBarButtonItem样式边界目标：自我操作：@选择器（webButtonPressed）]；
//创建地图按钮
UIBarButtonItem*mapButton=[[UIBarButtonItem alloc]initWithTitle:@“Mostrar Mapa”样式：UIBarButtonItem样式有边框的目标：自我操作：@选择器（mapButtonPressed）]；
self.toolbarItems=[NSArray arrayWithObjects:FavoriteSButton、webButton、mapButton、nil]；
[收藏夹按钮释放]；
[按钮释放]；
[地图按钮释放]；
}
#布拉格标记-
#pragma标记NSURLConnection委托
-（void）连接：（NSURLConnection*）连接DidReceiverResponse：（NSURResponse*）响应
{
NSHTTPURLResponse*resp=（NSHTTPURLResponse*）响应；
如果（（响应状态代码>=200）和&（响应状态代码<300））{
//正常状态代码
//准备临时数组
self.fotoData=[NSMutableData]；
//获取要为进度条下载的数据长度
self.dataSizeToDownload=resp.expectedContentLength；
self.datasizedownload=0；
}否则{
//错误的状态代码
self.fotoData=nil；
self.progressBar=nil；
[连接取消]；
self.fotoConnection=nil；
//重新配置视图
//除去旧的夹带物
[[self.view-withtag:1000]从SuperView移除]；
//创建重新定位的Dilla视图
UITextView*EntradilatextView=[[UITextView alloc]init]；
夹带剂