CODEWITHSUNDEEP
iosobjective-ccocoa-touchuitableview
sha
sha

Reputation: 17860

Is it possible to refresh one view inside UITableViewCell

I have a standard table view. Inside each cell UITableViewCell I have a label. At any given time I need to constantly updating one label for the whole tableView (imagine a clock ticking for example).

In the cellForRowAtIndexPath I recognize which cell I need to update and assign weak property to the label inside such cell.

Then later, I call

label.text = @"New value";

and expect for that particular cell to refresh that particular label. I checked the weak reference and it's valid and text is changing, however cell is not getting refreshed.

I don't want to call reloadRowsAtIndexPaths, I just need to refresh one subview inside cell view. Is it possible?

UPDATE:

Here is my code:

This is property definition inside view controller .m file:

@property (nonatomic, weak) UILabel* runningTimerLabel;

I assign this property inside cellForIndex call:

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

    MKSlidingTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"container"];
    TimerCell *foregroundCell = [tableView dequeueReusableCellWithIdentifier:kTimerCellId];
    UITableViewCell *backgroundCell = [tableView dequeueReusableCellWithIdentifier:@"background"];

    BOOL runningCell = (indexPath.row == self.runningTimer);

    if (runningCell) {
        self.runningTimerLabel = foregroundCell.time;
    }

    cell.foregroundView = foregroundCell;
    cell.drawerView = backgroundCell;
    cell.drawerRevealAmount = 146;
    cell.forwardInvocationsToForegroundView = YES;
    cell.delegate = self;
    cell.tag = indexPath.row;

    return cell; 
}

Here is the method that updates the label:

- (void)refreshRunningTimerCell
{
     self.runningTimerLabel.text = @"New text";
}

This method is getting called from a background thread:

- (void)refreshRunningTimer
{
    while (1) {
        sleep(_sleepTime);

        [self performSelectorOnMainThread: @selector(refreshRunningTimerCell)
                               withObject:nil waitUntilDone: YES];

    }
}

Upvotes: 0

Views: 864

Answers (2)

TobiaszParys
TobiaszParys

Reputation: 108

I really don't understand why you trying to get an reference on UIlabel.

You have self.runningTimer so you have a index row in your tableView, so just get

TimerCell *cell by cellForItemAtIndexPath and just update this cell.

Upvotes: 1

TobiaszParys
TobiaszParys

Reputation: 108

I think you can do this:

NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0];

UITableViewCell *cell = [self.tableView cellForItemAtIndexPath:indexPath];

[cell updateLabel:@"New string"];

Upvotes: 1

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