Loading a UIImageView subclass from a custom cell - ios

Question

I am not sure if this is a Storyboard Bug. I have created a project with a custom cell.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"HomeGameTurnCell";
HomeTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[HomeTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
The custom cell has some image views. One of the image views is a subclass.
#interface HomeTableViewCell : UITableViewCell
#property (strong, nonatomic) IBOutlet RoundedProfilePicture *profilePictureImageView;
#property (strong, nonatomic) IBOutlet UIImageView *turnThumbnailImage;
#property (strong, nonatomic) IBOutlet UILabel *usernameLabel;
#property (strong, nonatomic) IBOutlet UILabel *lastPlayedLabel;
#end
The RoundedProfilePicture subclass simply has the following:
-(id)init {
NSLog(#"%s",__PRETTY_FUNCTION__);
self = [super init];
if (self) {
[self setupView];
}
return self;
}
- (void)setupView
{
NSLog(#"%s",__PRETTY_FUNCTION__);
self.clipsToBounds = YES;
self.layer.cornerRadius = self.bounds.size.width / 2;
self.layer.borderWidth = 3;
self.layer.borderColor = [UIColor darkGrayColor].CGColor;
}
What I am finding is that the RoundedProfilePicture methods are not being called. Within the storyboard I have setup one prototype cell and the correct identifier. I also have the image view set as the correct Custom class. But it doesn't seem to take effect, is there something I am missing/could check?

Answer 1

When you are reusing an element you should override UITableViewCell method:
-(void)prepareForReuse
instead of init. It will called each time.
If you want one time initialization you should do it in: initWithStyle:reuseIdentifier:
- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
if (self) {
//do your stuff here
}
return self;
}
From apple docs:
If you registered a class for the specified identifier and a new cell must be created, this method initializes the cell by calling its initWithStyle:reuseIdentifier: method. For nib-based cells, this method loads the cell object from the provided nib file. If an existing cell was available for reuse, this method calls the cell’s prepareForReuse method instead.

Answer 2

The issue is that when a UIimageView is subclassed and called from the storyboard a different method is called for the init.
-(id)initWithCoder:(NSCoder *)aDecoder {
// As the subclassed UIImageView class is called from storyboard the initWithCoder is overwritten instead of init
NSLog(#"%s",__PRETTY_FUNCTION__);
self = [super initWithCoder:aDecoder];
if (self) {
[self setupView];
}
return self;
}
This resolves the issue of the rounded profile view not being called.