Image did not load into cell - IOS

Question

I'm trying to load a image into a table view cell, at the first time the image does not show, but if I refresh the table (using refresh control) and reload the data and the image show perfectly.

**I'm loading the image into the main thread and I'm using a custom cell

UIImage *image = //load image, it always return a value, never nil

if(image != nil){
    self.iconCell.contentMode = UIViewContentModeScaleAspectFill;
    self.iconCell.clipsToBounds = YES;
    self.iconCell.image = image;

    [self.iconCell setNeedsDisplay];
}

what could be the root of this issue?

show the code of how you are loading the image into the table view cell... — Michael Dautermann, Feb 15 '16 at 20:41
`iconCell` is a custom cell. does it have an `image` property or some other property that points to an image view? — Michael Dautermann, Feb 15 '16 at 20:51
its a custom cell class that has a UIImageView property calle iconCell — BlaShadow, Feb 15 '16 at 20:58
Where do you instantiate UITableView, or where do you create the custom cell in relation to the code you posted? — CaptJak, Feb 15 '16 at 21:52
from my tableviewController I dequeued my custom cell and call a method to setup the data. — BlaShadow, Feb 15 '16 at 21:53
Is your UITableView already instantiated when you add the image to the custom cell? — CaptJak, Feb 15 '16 at 21:54
Yes, I do an async call to a web service and call a completion on the main thread that load a local image. — BlaShadow, Feb 15 '16 at 22:02

score 0 · Answer 1 · edited May 23 '17 at 10:33

As part of your custom table view cell, you should keep track of which row (or index path) your custom cell is currently displaying.

E.G. add two properties to the custom cell like:

@property (strong) NSIndexPath *currentIndexPath;
@property (weak) UITableView *parentTableView; // important, must be weak!

And then you can set it in your view controller's "cellForIndexPath:" method like:

- (UITableViewCell *)tableView:(UITableView *)tableView
     cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    ...
    ...
    myCustomCell.currentIndexPath = indexPath;
    myCustomCell.parentTableView = tableView;

Now, in the same function where you update the image in your cell (and right after), you can reload the single cell by doing:

UIImage *image = //load image, it always return a value, never nil

if(image != nil){
    self.iconCell.contentMode = UIViewContentModeScaleAspectFill;
    self.iconCell.clipsToBounds = YES;
    self.iconCell.image = image;
}

// reloading now should have the image properly set...
NSArray *rowToReload = [NSArray arrayWithObject:self.currentIndexPath];
[self.parentTableView reloadRowsAtIndexPaths:rowToReload withRowAnimation:UITableViewRowAnimationNone];

More information can be seen in this related question.

score 0 · Accepted Answer · answered May 05 '16 at 17:09

0

The problem was that I'm using auto layout and the view does not have the installed checked for the current dimensions that I was testing.

Installing and Uninstalling Views for a Size Class

answered May 05 '16 at 17:09

BlaShadow

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Image did not load into cell - IOS

2 Answers2