remove the subviews from the contentView of UITableViewCell (reset the UITableView)

Any idea on how to reset a UITableView?

I want to display a new set of data at the press of a button and also remove all the subviews from the cell's contentView and refresh them with a new set of s开发者_如何学运维ubviews. I tried [tableView reloadData] but the data did get refreshed but the subviews added to the contentView of the cells previously persisted.

Better yet, when you create the cell:

#define MY_CUSTOM_TAG 1234
mySubview.tag = MY_CUSTOM_TAG;
[cell.contentView addSubview:mySubview] ;

And later on, when you need to remove it:

[[cell.contentView viewWithTag:MY_CUSTOM_TAG]removeFromSuperview] ;

I got the answer :)

if ([cell.contentView subviews]) {
    for (UIView *subview in [cell.contentView subviews]) {
        [subview removeFromSuperview];
    }
}

This piece of code will check if the cell's content view has any subviews.
If there are any, it removes them as the for loop iterates!

Instead of iterating through all the subviews (yourself) to remove them, you can simply do this,

[[scrollView subviews] makeObjectsPerformSelector:@selector(removeFromSuperview)];

cell.contentView.subviews.forEach({ $0.removeFromSuperview() })

If you want to remove all the subviews of a UITableViewCell you can use this code:

NSArray* subviews = [cell.contentView subviews];
for (UIView* subview in subviews) {
    [subview removeFromSuperview];
}

Using the code of @leftspin

I know this question is old, but i found a problem with the solution, if you remove one subview from one prototype cell, this view will be removed from all reused cells, this will create a null pointer in the next cell that will be reused.

If you subclass UITableViewCell and remove the subview from there, you will have to do this verification first:

if (mySubView != nil ) {
        mySubView.removeFromSuperview()
    }

This also will work inside your cellForRow at indexPath method

  func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! MyCustomCell

    if (cell.mySubView != nil) {
       cell.mySubView.removeFromSuperview()
     }
    return cell
}

Whit this you avoid the null pointer, the code is for swift 3. Hope this help somebody. :)

For Swift 3.1

        let theSubviews: Array = (cell?.contentView.subviews)!
        for view in theSubviews
        {
            view.removeFromSuperview()
        }

for subview in cell.contentView.subviews {
    subview.removeFromSuperview()
}

you try with replace the content but not the UI, for example to a label replace the text:

class CustomCell : UITableViewCell     {

    var firstColumnLabel = UILabel()

    override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
        firstColumnLabel = //create label

        contentView.addSubview(firstColumnLabel)
    }

    func setData(cad: String) {
        firstColumnLabel.text = cad
    }
}

and in your tableSource

 public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        var cell : UITableViewCell?
        cell = tableView.dequeueReusableCell(withIdentifier: "CustomCell", for: indexPath) as! CustomCell
            (cell as! CustomCell).setData(cad: "new value")
        return  cell!
    }