Feature request: Cancel button

[jslim89]

Some time user may accidentally tap the button, but once tapped, no cancel or close button, the only way to quite seems to end the task

How can I add a navigation bar with a cancel button without changing the original source?

[jslim89]

I add a Cancel button with a navigationBar by my self

YahooSession.h

// ...
@property BOOL mobileWebAuthorization;
@property UIViewController *rootViewController;
@property (nonatomic, weak) UINavigationBar *navBar; // ADD THIS
@property UIWebView *authorizationWebView;
@property UIWebView *mobileAuthorizationWebView;
// ...

YahooSession.m

// ...
- (void)sendUserToAuthorization
{
    // ...

    // Use UIWebView
    self.rootViewController = [[[UIApplication sharedApplication] keyWindow] rootViewController];
    UINavigationBar *navBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0, 0, self.rootViewController.view.frame.size.width, 64)];
    navBar.barTintColor = [UIColor colorWithRed:0.251 green:0.000 blue:0.565 alpha:1];
    UIBarButtonItem *closeButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(closeButtonTapped:)];
    UINavigationItem *item = [[UINavigationItem alloc] init];
    item.leftBarButtonItem = closeButton;
    item.hidesBackButton = YES;
    [navBar pushNavigationItem:item animated:NO];
    self.authorizationWebView = [[UIWebView alloc]initWithFrame:CGRectMake(0, navBar.frame.size.height, self.rootViewController.view.frame.size.width, self.rootViewController.view.frame.size.height - navBar.frame.size.height)];
    [self.authorizationWebView setDelegate:self];
    NSURLRequest *request = [NSURLRequest requestWithURL:self.authorizationUrl];
    [self.authorizationWebView loadRequest:request];
    [self.rootViewController.view addSubview:navBar];
    [self.rootViewController.view addSubview:self.authorizationWebView];
    _navBar = navBar;
}

- (void)closeButtonTapped:(id)sender
{
    [self.authorizationWebView removeFromSuperview];
    [self.navBar removeFromSuperview];
    self.authorizationWebView = nil;
    self.rootViewController = nil;
}

// ...
- (BOOL)webView:(UIWebView*)webView shouldStartLoadWithRequest:(NSURLRequest*)request
 navigationType:(UIWebViewNavigationType)navigationType
{
    // ...
        [webView removeFromSuperview];
        [self.navBar removeFromSuperview]; // ADD THIS
        self.authorizationWebView = nil;
        self.rootViewController = nil;

    // ...
        // If desktop web page, close and resend authorization with mobile mask activated
        [webView removeFromSuperview];
        [self.navBar removeFromSuperview]; // ADD THIS
        self.authorizationWebView = nil;
        self.rootViewController = nil;
        self.mobileWebAuthorization = YES;
        [self sendUserToAuthorization];
}