update UITableViewCell when UICollectionViewCell is selected - ios

Question

I am creating a project where I have a lot of options for user to select among different plans.
So I created a UITableViewCell, put UICollectionView inside with one UICollectionViewCell as one plan.
Now user can select only one plan out of all.
Let's say the user selects the second plan, I need to update the price on a button which is in UITableViewCell.
I know we can reload tableCell and update. But is there any other way to do except reloading UITableViewCell
Let me know the best way to do that except reloading whole tableviewcell

Answer 1

In didselect method of Uicollectionview, get the tableviewcell of price displaying and update the button.
CollectionView didSelectItem method
{
NSIndexPath *indexpathoftableviewcell = [NSIndexPath indexpathForRow:1 inSection:0];
UITableViewCell *priceCell = [tableView cellForRowAtIndexPath: indexpathoftableviewcell];
UIButton *priceBtn = (UIButton*)[priceCell viewWithTag:tagOfBtn];
[priceBtn setTitle:#"43432" forControlState:UIControlStateNormal];
}

Answer 2

Assuming your UITableViewCell loads the UICollectionView inside it, so the obvious choice for UICollectionView's DataSource and Delegate should be your UICollectionViewCell.
So in your TableView Cell you can simply access the label that you need to update with price as shown below
extension MyTableViewCell : UICollectionViewDataSource {
func numberOfSections(in collectionView: UICollectionView) -> Int {
return 1
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 100
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let someCell : MyCollectionViewCell = collectionView.dequeueReusableCell(withReuseIdentifier: "your_identifier", for: indexPath) as! MyCollectionViewCell
return someCell
}
}
extension MyTableViewCell : UICollectionViewDelegate {
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
let cell = collectionView.cellForItem(at: indexPath) as! MyCollectionViewCell
self.priceLabel.text = "\(cell.value)"
}
}
here I am assuming that your CollectionViewCell is a custom cell and has a property named value where it store the price of plan

Answer 3

Accommodate the Plans (UICollectionView) & Price (UILabel or UIButton) in the UITableViewCell rather than making it as separate cells
Here is the reason behind it.
Both Price and Plans are tightly coupled. It means, When you change plan the respective price should come and this requirement may grow in future like adding some more views. If you accommodate the entire part in one UITableViewCell, it will become very easy. This way you can manage your design future proof.
regarding the question, the price is just like one more IBOutlet in the CustomTableViewCell. Just update the price in
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {}