UIView在取消分配ARC后保留子视图

Question

I have a problem with one of my views retaining its subviews. The main view displays 'tables' in a restaurant, and loads a subview to display this 'table'.

When the main view is deallocated, the tables seem to remain allocated to memory. I have searched everywhere to try and find a solution to this as I just can't seem to fix it myself.

Firstly the code for the 'table' view:

@protocol tableDelegate <NSObject>
@required
- (void)tablePress:(id)sender;
- (void)tableSelect:(id)sender;

@end

@interface tablevw : UIView
{
     CGPoint currentPoint;
}

-(void)changeOrderImage;
-(id)initWithFrame:(CGRect)frame teststring:(NSString *)ts;

@property (nonatomic, weak) IBOutlet UIView *view;
@property (nonatomic, weak) IBOutlet UILabel *numberLabel;
@property (nonatomic, weak) IBOutlet UILabel *nameLabel;
@property (nonatomic) BOOL isEdit;
@property (nonatomic) BOOL hasOrder;
@property (nonatomic, strong) NSMutableDictionary * orderNumbers;
@property (nonatomic) int orderNumber;
@property (nonatomic, strong) NSString *teststring;
@property (nonatomic, weak) IBOutlet UIImageView *tableImage;
@property (nonatomic, weak) id<tableDelegate> delegate;

@end

And the init method for the view:

- (id)initWithFrame:(CGRect)frame teststring:(NSString *)ts{
    self = [super initWithFrame:frame];
   if (self) {

        orderNumbers = [[NSMutableDictionary alloc]init];

        isRemote = FALSE;
   NSString *filePath = [[NSBundle mainBundle] pathForResource:@"tabletopRound" ofType:@"png"];

        UIImageView * iV  =[[UIImageView alloc] initWithImage:[[UIImage alloc] initWithContentsOfFile:filePath]];

        self.tableImage= iV;


        tableImage.frame = CGRectMake(0, 0, 121, 121);

        locked = FALSE;

       [self addSubview:tableImage];


        UITapGestureRecognizer *doubleTapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(doubleTap)];

        doubleTapGestureRecognizer.numberOfTapsRequired = 2;


        [self addGestureRecognizer:doubleTapGestureRecognizer];

    UILabel * label = [[UILabel alloc] initWithFrame:CGRectMake(35, 50, 48, 20)];

        numberLabel = label;
        [numberLabel setTextColor:[UIColor blackColor]];
        [numberLabel setBackgroundColor:[UIColor clearColor]];
        [numberLabel setText:ts];
        [self addSubview:numberLabel];


    UILabel * labelTwo  = [[UILabel alloc] initWithFrame:CGRectMake(24, 123, 70, 20)];
    nameLabel = labelTwo;
    [nameLabel setTextColor:[UIColor whiteColor]];
    [nameLabel setBackgroundColor:[UIColor clearColor]];
    [self addSubview:nameLabel];

    self.userInteractionEnabled = YES;

 self.tag = [ts intValue];

}


return self;

}

Finally, in the 'main' view the tables are added like so:

NSString *myString = [results stringForColumn:@"table_number"];

tablevw * tableView = [[tablevw alloc] initWithFrame:CGRectMake(x-60.5, y-60.5, 121, 121) teststring:myString];
tableView.delegate = self;
 [self.view addSubview: tableView];

The delegate is set to Nil when the main view is dealloced. I have over ridden the dealloc method to log the dealloc calls to me - it is being called on the 'main' view but not on the 'table' view.

Thanks for your help

Answer 1

In the dealloc method try

for (UIView *view in [self.view subviews]) {
    [view removeFromSuperview];
}

It would be even better if u can try

[tablevw removeFromSuperview], tablevw = nil;

Answer 2

I can see that your tablevw has a week reference to his delegate and that should be enough for to release the parent, but just for argue sake trie to nil tablevws delegate. Create an array of tablevw instances you created (or tag them as already suggested), then before you release parent remove them from superview, set their delegate to nil and kill the array. See what happenes, maybe that will help...