Objective c 消失NSMutableArray，导致UiTableView显示空白单元格

我有一个UITableView，它显示了一个食谱列表。我用一个自定义类recipe创建每个菜谱，然后将菜谱放入一个msmutable数组“recipes”。问题是，当我开始滚动“recipes”数组时，它似乎丢失了所有数据（计数为0）。这意味着进入视图的单元格不能显示任何配方信息。到底发生了什么？为什么阵列会消失

代码如下：

// .h

#import "CustomCell.h"
#import "Recipe.h"
@interface ViewController : UIViewController <UITableViewDataSource, UITableViewDelegate>
@property (weak, nonatomic) IBOutlet UITableView *recipeTableView;
@property (weak, nonatomic) NSMutableArray *recipes;


// .m
@synthesize recipeTableView;
@synthesize Recipes;

- (void)viewDidLoad
{
    [super viewDidLoad];
   Recipe *recipe1 = [[Recipe alloc] initWithCategory:@"Seafood" title:@"Recipe 1"];
    recipe1.recipeImage = [UIImage imageNamed:@"recipeImage1.png"];

    Recipe *recipe2 = [[Recipe alloc] initWithCategory:@"Seafood" title:@"Recipe 2"];
    recipe2.recipeImage = [UIImage imageNamed:@"recipeImage2.png"];

    Recipe *recipe3 = [[Recipe alloc] initWithCategory:@"Seafood" title:@"Recipe 3"];
    recipe3.recipeImage = [UIImage imageNamed:@"recipeImage3.png"];

    Recipe *recipe4 = [[Recipe alloc] initWithCategory:@"Seafood" title:@"Recipe 4"];
    recipe4.recipeImage = [UIImage imageNamed:@"recipeImage4.png"];

    Recipe *recipe5 = [[Recipe alloc] initWithCategory:@"Seafood" title:@"Recipe 5"];
    recipe5.recipeImage = [UIImage imageNamed:@"recipeImage5.png"];

    Recipe *recipe6 = [[Recipe alloc] initWithCategory:@"Seafood" title:@"Recipe 6"];
    recipe6.recipeImage = [UIImage imageNamed:@"recipeImage6.png"];

    Recipe *recipe7 = [[Recipe alloc] initWithCategory:@"Seafood" title:@"Recipe 7"];
    recipe7.recipeImage = [UIImage imageNamed:@"recipeImage7.png"];

    Recipe *recipe8 = [[Recipe alloc] initWithCategory:@"Seafood" title:@"Recipe 8"];
    recipe8.recipeImage = [UIImage imageNamed:@"recipeImage8.png"];

    Recipe *recipe9 = [[Recipe alloc] initWithCategory:@"Seafood" title:@"Recipe 9"];
    recipe9.recipeImage = [UIImage imageNamed:@"recipeImage9.png"];

    Recipe *recipe10 = [[Recipe alloc] initWithCategory:@"Seafood" title:@"Recipe 10"];
    recipe10.recipeImage = [UIImage imageNamed:@"recipeImage10.png"];


    recipes = [NSMutableArray arrayWithObjects:recipe1, recipe2, recipe3, recipe4, recipe5, recipe6, recipe7, recipe8, recipe9, recipe10, nil];

}




- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    Recipe *recipe = (Recipe*)[recipes objectAtIndex:indexPath.row];
    static NSString *CellIdentifier = @"RecipeCell";
    CustomCell *cell = (CustomCell *) [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    cell.selectionStyle = UITableViewCellSelectionStyleNone;
    cell.titleLabel.text = recipe.title;
    return cell;
}

/.h
#导入“CustomCell.h”
#导入“Recipe.h”
@界面ViewController:UIViewController
@属性（弱，非原子）IBUITableView*recipeTableView；
@属性（弱、非原子）NSMutableArray*配方；
//m
@综合交互视图；
@综合配方；
-（无效）viewDidLoad
{
[超级视图下载]；
配方*recipe1=[[Recipe alloc]initWithCategory:@“海鲜”标题：@“配方1”]；
recipe1.recipeImage=[UIImage ImageName:@“recipeImage1.png”]；
配方*recipe2=[[Recipe alloc]initWithCategory:@“海鲜”标题：@“配方2”]；
recipe2.recipeImage=[UIImage ImageName:@“recipeImage2.png”]；
配方*recipe3=[[Recipe alloc]initWithCategory:@“海鲜”标题：@“配方3”]；
recipe3.recipeImage=[UIImage ImageName:@“recipeImage3.png”]；
配方*recipe4=[[Recipe alloc]initWithCategory:@“海鲜”标题：@“配方4”]；
recipe4.recipeImage=[UIImage ImageName:@“recipeImage4.png”]；
配方*recipe5=[[Recipe alloc]initWithCategory:@“海鲜”标题：@“配方5”]；
recipe5.recipeImage=[UIImage ImageName:@“recipeImage5.png”]；
配方*recipe6=[[Recipe alloc]initWithCategory:@“海鲜”标题：@“配方6”]；
recipe6.recipeImage=[UIImage ImageName:@“recipeImage6.png”]；
配方*recipe7=[[Recipe alloc]initWithCategory:@“海鲜”标题：@“配方7”]；
recipe7.recipeImage=[UIImage ImageName:@“recipeImage7.png”]；
配方*recipe8=[[Recipe alloc]initWithCategory:@“海鲜”标题：@“配方8”]；
recipe8.recipeImage=[UIImage ImageName:@“recipeImage8.png”]；
配方*recipe9=[[Recipe alloc]initWithCategory:@“海鲜”标题：@“配方9”]；
recipe9.recipeImage=[UIImage ImageName:@“recipeImage9.png”]；
配方*recipe10=[[Recipe alloc]initWithCategory:@“海鲜”标题：@“配方10”]；
recipe10.recipeImage=[UIImage ImageName:@“recipeImage10.png”]；
recipes=[NSMutableArray数组，其对象为：recipe1、recipe2、recipe3、recipe4、recipe5、recipe6、recipe7、recipe8、recipe9、recipe10、nil]；
}
-（UITableViewCell*）tableView:（UITableView*）tableView cellForRowAtIndexPath:（NSIndexPath*）indexPath
{
Recipe*Recipe=（Recipe*）[recipes objectAtIndex:indexPath.row]；
静态NSString*CellIdentifier=@“RecipeCell”；
CustomCell*单元格=（CustomCell*）[tableView dequeueReusableCellWithIdentifier:CellIdentifier]；
cell.selectionStyle=UITableViewCellSelectionStyleNone；
cell.titleLabel.text=recipe.title；
返回单元；
}

您的数组正在自动删除，请在配方分配后添加以下内容

[recipes retain];

或者将创建数组的方式更改为

recipes = [[NSMutableArray alloc] initWithObjects:.... etc

---

如果您在iOS5中使用ARC，那么您应该将您的recipes变量声明为strong，这将有效地为您保留参数。

@simon是正确的。此外，

recipeTableView

应该是（非原子的，强的），只要加载视图，它就会被保留。一般来说，我倾向于使用强项vs弱项，除非/直到你有一个需要强项的具体原因。随着您对内存管理和对象生命周期越来越熟悉，您将发现需要/需要弱的情况。

像这样声明属性：

@property（strong，nonatomic）NSMutableArray*显示谢谢，改为“强工作”。我第一次进入ARC是令人困惑的。