Scrolling PDF programmatically in UIWebView

Question

I wanna to scroll(down) on a UIWebView(iPad Application), where I will display a local pdf file, programmatically. I have added a UIWebView with the interface builder and linked it.

@interface ViewController : UIViewController <UIWebViewDelegate>

@property (weak, nonatomic) IBOutlet UIWebView *webView;

@end

This is my code for getting the pdf file and scrolling. The webViewDidFinishLoad function gets called.

@synthesize webView = _webView;

- (void)viewDidLoad
{
    [super viewDidLoad];

    NSString *path = [[NSBundle mainBundle] pathForResource:@"test" ofType:@"pdf"];
    NSURL *targetURL = [NSURL fileURLWithPath:path];
    NSURLRequest *request = [NSURLRequest requestWithURL:targetURL];

    self.webView.delegate = self;
    [self.webView loadRequest:request];
}

#pragma mark - UIWebViewDelegate

- (void)webViewDidFinishLoad:(UIWebView *)webView
{
    NSLog(@"didLoad");

    self.webView.scrollView.contentOffset = CGPointMake(0, 500);
}

I am using the iOS SDK 6.1, the iOS deployment target is also 6.1.

Heres the log:

2013-04-23 09:23:08.742 PDFViewer[3834:c07] DiskImageCache: Could not resolve the absolute path of the old directory.
2013-04-23 09:23:08.913 PDFViewer[3834:c07] didLoad

The UIWebView isn't scrolling. The pdf is still at the first page.

http://stackoverflow.com/questions/3525256/how-to-set-content-offset-and-content-size-in-a-uiwebview — Balu, Apr 23 '13 at 07:31
The problem is that self.webView.scrollView.contentSize is wrong. Its not the real contentSize. [He has the same problem](http://stackoverflow.com/questions/9013754/uiwebview-content-height-not-accurate-in-scrollview-contentsize) — Niklas, Apr 23 '13 at 08:00
I did not fix the problem. I was to lazy to search for a library, because this feature was only nice to have. Maybe they fix the bug with the contentSize in iOS 7. — Niklas, Jul 12 '13 at 16:34

score 1 · Accepted Answer · edited May 23 '17 at 11:43

1

already answered here --- how to set scroll position on uiwebview , try calling content offset code snippet after a delay

edited May 23 '17 at 11:43

Community

1
1

answered Apr 23 '13 at 08:02

karthik

1,271
1
14
27

score 0 · Answer 2 · answered Apr 23 '13 at 07:35

0

I don't think you need to set the webView.scrollView.contentOffset.

try this

[webView setScalesPageToFit:YES];

answered Apr 23 '13 at 07:35

AMohan

534
1
6
15

The problem is that contentSize of webview.scrollView is equal to the screen size. – Niklas Apr 23 '13 at 08:05

Scrolling PDF programmatically in UIWebView

2 Answers2