How to size UIWebView in a UIModalPresentationFormSheet? - ios

Question

I tried every permutation known to mankind and I cannot get a UIWebView to size properly in a modal form view for the iPad. The web page still displays the full iPad portrait width of 768 points.
Where and how do I tell UIWebView to display width 540 points?
I thought 'scalesPageToFit' is supposed to do this but it does not work.
I tried setting the web view to the size of form view which is 540 x 576 with navigation and status bar. Height is irrelevant though.
I tried adding a UIWebView to a UIView in a storyboard with all resizing set. I then removed the UIWebView and added it programmatically.
- (void)viewDidLoad
{
[super viewDidLoad];
CGRect aFrame = self.view.frame;
if (IS_IPAD)
{
aFrame = CGRectMake(0, 0, FORM_VIEW_WIDTH, FORM_VIEW_HEIGHT);
}
_webView = [[UIWebView alloc] initWithFrame:aFrame];
[_webView setOpaque:NO];
[_webView setDelegate:self];
[_webView setScalesPageToFit:YES];
self.view = _webView;
...
}
I also tried loading in viewDidAppear (in addition to viewDidLoad, viewWillAppear, etc.)
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
[[self webView] setFrame:CGRectMake(0, 0, FORM_VIEW_WIDTH, FORM_VIEW_HEIGHT)];
[[self webView] setScalesPageToFit:YES];
NSURL *webURL = [NSURL URLWithString:#"http://www.google.com"];
NSURLRequest *request = [NSURLRequest requestWithURL:webURL cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:5.0f];
[[self webView] loadRequest:request];
}
Any recommendations appreciated.

Answer 1

This keeps happening to me. I post a lengthy question, then two seconds later I find the answer.
Anyway, someone posted a solution to this problem here:
UIWebView -- load external website, programmatically set initial zoom scale, and allow user to zoom afterwards
However, I altered the script to set the width to the iPad width:
- (void)webViewDidFinishLoad:(UIWebView *)webView
{
NSString* js =
#"var meta = document.createElement('meta'); "
#"meta.setAttribute( 'name', 'viewport' ); "
#"meta.setAttribute( 'content', 'width = 540px, initial-scale = 1.0, user-scalable = yes' ); "
#"document.getElementsByTagName('head')[0].appendChild(meta)";
[[self webView] stringByEvaluatingJavaScriptFromString: js];
}
Note the portion 'width = 540px, initial-scale = 1.0, user-scalable = yes'
I changed the width to the form width and scale to 1.0.
I also need to handle iPhone, and so I will make adjustments for that next. I think this fix may only be needed for the iPad form view.
UPDATE: Answer is short-lived. If I load any other page the sizing is thrown off again. Back to square one.
SOLUTION: This view will only need to access a few web pages that I developed. Therefore, I updated the few web pages that I need to access by adding the meta tag to each of them. I only need to access these pages and so this is the solution I plan to go with. This means I need to set the viewport width to 540px only for iPad somehow. I will figure that out next.
<meta name="viewport" content="width:540, initial-scale=1, maximum-scale=1">