Programmatically Set UITableView Section Titles on iPhone/iPad

When working with a UITableView, it's often necessary to group data into sections. By default, these sections are usually labeled with a title that corresponds to the data contained within. However, there may be cases where you want to programmatically set these section titles rather than relying on the default behavior.

To do so, you'll need to implement the UITableViewDataSource protocol's titleForHeaderInSection method. This method is called for each section in the table view and returns the title that should be displayed for that section.

Here's an example implementation of titleForHeaderInSection that sets the section titles based on an array of strings:

func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
    let sectionTitles = ["Section 1", "Section 2", "Section 3"]
    return sectionTitles[section]

In this example, the section titles are hardcoded into an array. However, you could easily modify this code to generate the titles dynamically based on the data in your table view.

It's worth noting that if you don't implement titleForHeaderInSection, the table view will use the default section titles based on the first letter of the data in each section. So if you want to programmatically set section titles, be sure to implement this method in your data source.

In summary, setting UITableView section titles programmatically is a straightforward process. Simply implement the UITableViewDataSource protocol's titleForHeaderInSection method and return the desired title for each section.

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