Question

我的应用中有内存泄漏。我的应用程序在tableviewcontroller上启动。我解析一个json文件来填充数组。然后，此数组用于填充tableview的单元格。我用对象（类）填充我的数组。

我做：

[tab_Demandes removeAllObjects];

for (NSDictionary *demandeD in demandes)

{
    Demande *dem =[[Demande alloc] init];

    dem.demTitle=title;

    dem.demId=Id;

    dem.demCreated=created;

    [tab_Demandes addObject:dem];

    [dem release];
}

我的数组和tableview在启动时填充，没问题。如果我点击一个表格单元格，然后想要回到tableview上我的应用程序崩溃：

[tab_Demandes removeAllObjects];

如果我没有[dem release]我每次重新加载tab_Demandes时都会在乐器中泄漏。 RemoveAllObjects有效，但我有泄漏。

顺便提供任何帮助。

Wallou ++

编辑：这是我制作我的细胞的地方。也许我在创建细胞时搞砸了实际上tab_Demandes在委托中声明，get / set从其他类（我加载tableviewcontroller）中访问它。

（UITableViewCell *）tableView：（UITableView *）tableView cellForRowAtIndexPath：（NSIndexPath *）indexPath {

static NSString *CellIdentifier = @"Cell";

CustomCellViewController *cell = (CustomCellViewController *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
   // NSLog(@"Cell created");
    NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:@"CustomCellViewController" owner:nil options:nil];

    for(id currentObject in topLevelObjects)
    {
        if([currentObject isKindOfClass:[CustomCellViewController class]])
        {
            cell = (CustomCellViewController *)currentObject;
            break;
        }
    }
}

    // Set up the cell...


    TabsAppDelegate *appDelegate = (TabsAppDelegate*)[[UIApplication sharedApplication] delegate];

    cell.lbl_demId.text=[NSString stringWithFormat:@"%@", [[[appDelegate tab_Demandes] objectAtIndex:indexPath.row ] demId]];
    cell.lbl_demCopro .text=[NSString stringWithFormat:@"%@", [[[appDelegate tab_Demandes] objectAtIndex:indexPath.row] demIdCopro ]];
    cell.lbl_demImmeuble.text=[NSString stringWithFormat:@"%@", [[[appDelegate tab_Demandes] objectAtIndex:indexPath.row] demIdImmeuble]];
    cell.lbl_demLot.text=[NSString stringWithFormat:@"%@", [[[appDelegate tab_Demandes] objectAtIndex:indexPath.row] demIdLot]];
    cell.lbl_demDescriptif.text=[NSString stringWithFormat:@"%@", [[[appDelegate tab_Demandes] objectAtIndex:indexPath.row] demTitle]];
    //NSLog(@"statut demande : %@",[[tab_Demandes objectAtIndex:indexPath.row] demStatut]);
    if ([[[[appDelegate tab_Demandes] objectAtIndex:indexPath.row] demStatut] isEqualToString: @"Validée"])
    {
    cell.lbl_ImageView.image=[UIImage imageNamed:@"VDEM2.png"];
    }
    if([[[[appDelegate tab_Demandes] objectAtIndex:indexPath.row] demStatut] isEqualToString: @"Initiée"])
    {
       cell.lbl_ImageView.image=[UIImage imageNamed:@"IDEM.png"];
    }
    if([[[[appDelegate tab_Demandes] objectAtIndex:indexPath.row] demStatut] isEqualToString: @"Terminée"])
    {
    cell.lbl_ImageView.image=[UIImage imageNamed:@"TDEM.png"];
    }
    if([[[[appDelegate tab_Demandes] objectAtIndex:indexPath.row] demStatut] isEqualToString: @"En coursée"])
    {
    cell.lbl_ImageView.image=[UIImage imageNamed:@"EDEM.png"];
    }


return cell;

}

新编辑：

Demandes.h：

@interface Demande : NSObject { 

    NSString *demId;
    NSString *demStatut;
    NSString *demTitle;
    NSString *demCreated;
    NSString *demIdCopro;
    NSString *demIdImmeuble;
    NSString *demIdLot;
    NSString *demDescriptif;
    NSString *demAuteur;
    NSString *demIdAuteur;
    NSString *demLoginAuteur;   
}

@property (retain,nonatomic) NSString *demId;
@property (retain,nonatomic) NSString *demIdCopro;
@property (retain,nonatomic) NSString *demIdImmeuble;
@property (retain,nonatomic) NSString *demIdLot;
@property (retain,nonatomic) NSString *demDescriptif;
@property (retain,nonatomic) NSString *demStatut;
@property (retain,nonatomic) NSString *demTitle;
@property (retain,nonatomic) NSString *demCreated;
@property (retain,nonatomic) NSString *demAuteur;
@property (retain,nonatomic) NSString *demIdAuteur;
@property (retain,nonatomic) NSString *demLoginAuteur;
@end

Demandes.m：

import "Demande.h"
@implementation Demande


@synthesize demId,demIdCopro,demIdImmeuble,demIdLot,demDescriptif,demStatut,demTitle,demCreated,demAuteur,demIdAuteur,demLoginAuteur;


- (void)dealloc {   
    [demId release];
    [demIdCopro release];
    [demId release];
    [demIdImmeuble release];
    [demIdLot release];
    [demDescriptif release];
    [demStatut release];
    [demTitle release];
    [demCreated release];
    [demAuteur release];
    [demIdAuteur release];
    [demLoginAuteur release];
    [super dealloc];
}
@end

Answer 1

上面的代码是正确的。我想知道你是否过度释放你数组中的对象（即在tableView：cellForRowAtIndexPath方法中）。调用removeAllObject时，该方法会释放它删除的每个对象。如果一个对象已经被释放并取消分配，那么您的应用程序将崩溃。

建议的优化：

- 确保nib中的cellIdentifier很好@“Cell”

-replace

cell.lbl_demId.text=[NSString stringWithFormat:@"%@", [[[appDelegate tab_Demandes] objectAtIndex:indexPath.row ] demId]];

通过

Demand* dem = [[[appDelegate tab_Demandes] objectAtIndex:indexPath.row ];
cell.lbl_demId.text=[NSString stringWithFormat:@"%@", [dem demId]];

避免过多地查询数组。

- 避免将模型放在appDelegate中，而是创建一个单例模型对象。这是一个常见的初学者设计错误，因为appDelegate是一个易于定制和访问的对象，可以避免将模型传递给每个对象。

将对象添加到MutableArray时泄漏

1 个答案: