Iphone – Disable Back and Forward button on UIToolBar in UIWebview

iphoneuiwebview

i am new to iphone. i want to disable Back(left arrow button) and Forward(right arrow button) button on UIToolBar in UIWebView. After moved web page want enable back button and then Forward button want to enable when its need. in my app, i am using toolbar at bottom side via interface builder. please any one help me!

Best Answer

Send the following message to the button object to enable/disable:

// Enable 
[myButton setEnabled:YES];

// Disable
[myButton setEnabled:NO];

To determine whether you should show these buttons you should check the following properties on the webview:

[myWebView canGoBack];
[myWebView canGoForward];

You'll want to check these whenever the user loads a page. To do so implement the UIWebViewDelegate method webViewDidFinishLoad:

-(void)webViewDidFinishLoad:(UIWebView *)webView
{
  // Enable or disable back
  [myBackButton setEnabled:[myWebView canGoBack]];

  // Enable or disable forward
  [myForwardButton setEnabled:[myWebView canGoForward]];

 }

Related Solutions

Ios – Creating a left-arrow button (like UINavigationBar’s “back” style) on a UIToolbar

I used the following psd that I derived from http://www.teehanlax.com/blog/?p=447

http://www.chrisandtennille.com/pictures/backbutton.psd

I then just created a custom UIView that I use in the customView property of the toolbar item.

Works well for me.

Edit: As pointed out by PrairieHippo, maralbjo found that using the following, simple code did the trick (requires custom image in bundle) should be combined with this answer. So here is additional code:

// Creates a back button instead of default behaviour (displaying title of previous screen)
UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"back_arrow.png"]
                                                               style:UIBarButtonItemStyleBordered
                                                              target:self
                                                              action:@selector(backAction)];

tipsDetailViewController.navigationItem.leftBarButtonItem = backButton;
[backButton release];

Ios – Disabled UIButton not faded or grey

You can use following code:

sendButton.enabled = YES;
sendButton.alpha = 1.0;

or

sendButton.enabled = NO;
sendButton.alpha = 0.5;

Best Answer

Related Solutions

Ios – Creating a left-arrow button (like UINavigationBar’s “back” style) on a UIToolbar

Ios – Disabled UIButton not faded or grey

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