UPI Intent in WebView - iOS

func application(_ app: UIApplication, open url: URL, options: [UIApplication.OpenURLOptionsKey: Any] = [:]) -> Bool {
    return true
}
```objectivec: Objective C
func application(_ app: UIApplication, open url: URL, options: [UIApplication.OpenURLOptionsKey : Any] = [:]) -> Bool {
   return true
}

class CheckoutPaymentViewController: UIViewController {
    
    var checkoutUrl: String?

    // You can assign the checkout URL String to checkoutUrl property or pass it from previous page.
    
    @IBOutlet weak var wkWebView: WKWebView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        wkWebView.navigationDelegate = self
        self.loadWebPage()
    }
    
    func loadWebPage() {
        guard let urlString = self.checkoutUrl else { return }
        guard let url = URL(string: urlString) else { return }
        self.wkWebView.load(URLRequest(url: url))
    }
}
```objectivec: Objective C
#import 

@interface WebViewController () 
{
    IBOutlet WKWebView *webView;
}
@end

@implementation WebViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    webView.navigationDelegate = self;
    [self loadWebPage];
}

- (void)loadWebPage
{
    NSURL *url = [[NSURL alloc] initWithString:@""];
    NSMutableURLRequest *urlRequest = [[NSMutableURLRequest alloc] initWithURL:url];
    [webView loadRequest:urlRequest];
}

extension CheckoutPaymentViewController: WKNavigationDelegate {
    func webView(_ webView: WKWebView,
                 decidePolicyFor navigationAction: WKNavigationAction,
                 decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {
        
        // If the request is a non-http(s) schema, then have the UIApplication handle opening the request.
        if let url = navigationAction.request.url,
           !url.absoluteString.hasPrefix("http://"),
           !url.absoluteString.hasPrefix("https://"),
           UIApplication.shared.canOpenURL(url) {
            
            // Have UIApplication handle the url (sms:, tel:, mailto:, ...)
            UIApplication.shared.open(url, options: [:], completionHandler: nil)
            
            // Cancel the request (handled by UIApplication).
            decisionHandler(.cancel)
        }
        else {
            // Allow the request.
            decisionHandler(.allow)
        }
    }
}
```objectivec: Objective C
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {
    NSURL *url = navigationAction.request.URL;
    NSString *urlString = url.absoluteString;
    BOOL hasHttpPrefix = [[urlString lowercaseString] hasPrefix:@"http://"];
    BOOL hasHttpsPrefix = [[urlString lowercaseString] hasPrefix:@"https://"];
    BOOL canOpenUrl = [[UIApplication sharedApplication] canOpenURL:url];
    
    if (!hasHttpPrefix && !hasHttpsPrefix && canOpenUrl) {
        NSDictionary *options = [[NSDictionary alloc] init];
        [[UIApplication sharedApplication] openURL:url options:options completionHandler:nil];
        
        decisionHandler(WKNavigationActionPolicyCancel);
    } else {
        decisionHandler(WKNavigationActionPolicyAllow);
    }
}