如何在自定义表格视图单元格上获取UILabel？

Question

In my custom cell there is a UILabel and one UIButton . Whenever I click on that UIButton the UILabel 's height is increased as per content of the label.

The problem is that how can I get that UILabel that is a subview of a cell. Every cell contains a label and a button but only that UILabel is increased that the cell button is clicked, others remain as they are.

Thanks in advance.

Answer 1

为此，您需要为每个组件分配TAG。

Answer 2

Try bind the method to your button may work for you.

-(void)buttonClick:(id)sender {


UITableViewCell *cell=(UITableViewCell*)[sender superview];
NSArray *subviews=[cell subviews];
for (int i=0; i<[subviews count]; i++) {
    id object=[subviews objectAtIndex:i];
    if([object isKindOfClass:[UILabel class]]){
        //do stuff here
    }
}

}

Answer 3

The easiest way is to assign the tag property to the labels. That way in your button action method you can find the relevant label. For example:

- (void) myButtonAction: (UIButton *) sender
{
    UILabel *theLabel = (UILabel *) [sender.superview viewWithTag: MYLABELTAG];
    // Do something with theLabel
}

What this code does is finds the label in the same view as the button is in.

Answer 4

You can go through all subview s in the cell and see which one is a UILabel :

for(UIView *v in [cell subviews])
{
    if([v isKindOfClass:[UILabel class]])
       //you can put more checks to see if height is to be increased/decreased
       [v setFrame:CGRectMake(origin.x,origin.y,width,height)];
}

Answer 5

I wrote a short example on how to get labels from tablecells here: https://stackoverflow.com/a/9864169/407488

But i think what you want is to increase all labels in all cells at once? Then just use reloadData and change a member variable before calling it (when touching the button). You read that member in your cellForRow: code and assign the height appropriate.