How to know when search bar text changes

Question

I have a search bar and I need to get a notification when the bar text changes, how can I do that? I need to reload the table view every time the string value of the search bar changes

Accepted Answer

Follow the below steps to get it done

Add Delegate methods for your View Controller

```
ViewController: UISearchBarDelegate, UISearchDisplayDelegate
```

Create IBOutlet for your searchBar

```
@IBOutlet weak var searchBarVar: UISearchBar!
```

Assign Delegates as self to searchBar in viewDidLoad.

```
override func viewDidLoad() {
    super.viewDidLoad()
    
    searchBarVar.delegate = self
}
```

Implement the textDidChange delegate method

Swift 4:

```
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
    print("searchText",searchText)
}
```

ObjC

`- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText;`

How to know when search bar text changes

Solution

Problem

Related problems