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# UIWebViewDelegate

The `UIWebViewDelegate` protocol defines methods that a delegate of a [`UIWebView`](/documentation/UIKit/UIWebView) object can optionally implement to intervene when web content is loaded.

```
@MainActor protocol UIWebViewDelegate : NSObjectProtocol
```

## Overview> Important:
> Before releasing an instance of `UIWebView` for which you have set a delegate, you must first set the `UIWebView` delegate property to `nil` before disposing of the `UIWebView` instance. This can be done, for example, in the dealloc method where you dispose of the `UIWebView`.

## Topics

### Loading Content

[`webView(_:shouldStartLoadWith:navigationType:)`](/documentation/UIKit/UIWebViewDelegate/webView(_:shouldStartLoadWith:navigationType:))

Sent before a web view begins loading a frame.

[`webViewDidStartLoad(_:)`](/documentation/UIKit/UIWebViewDelegate/webViewDidStartLoad(_:))

Sent after a web view starts loading a frame.

[`webViewDidFinishLoad(_:)`](/documentation/UIKit/UIWebViewDelegate/webViewDidFinishLoad(_:))

Sent after a web view finishes loading a frame.

[`webView(_:didFailLoadWithError:)`](/documentation/UIKit/UIWebViewDelegate/webView(_:didFailLoadWithError:))

Sent if a web view failed to load a frame.


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