I found something that worked for me. The problem is that when uiwebview changes its orientation web contents are zoommed to fit with viewport. But zoomscale parameter of scrollview subview is not updated correctly (nor are updated minimumZoomScale nor maximumZoomScale
Then we need to do it manually at willRotateToInterfaceOrientation
:
- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {
CGFloat ratioAspect = webview.bounds.size.width/webview.bounds.size.height;
switch (toInterfaceOrientation) {
case UIInterfaceOrientationPortraitUpsideDown:
case UIInterfaceOrientationPortrait:
// Going to Portrait mode
for (UIScrollView *scroll in [webview subviews]) { //we get the scrollview
// Make sure it really is a scroll view and reset the zoom scale.
if ([scroll respondsToSelector:@selector(setZoomScale:)]){
scroll.minimumZoomScale = scroll.minimumZoomScale/ratioAspect;
scroll.maximumZoomScale = scroll.maximumZoomScale/ratioAspect;
[scroll setZoomScale:(scroll.zoomScale/ratioAspect) animated:YES];
}
}
break;
default:
// Going to Landscape mode
for (UIScrollView *scroll in [webview subviews]) { //we get the scrollview
// Make sure it really is a scroll view and reset the zoom scale.
if ([scroll respondsToSelector:@selector(setZoomScale:)]){
scroll.minimumZoomScale = scroll.minimumZoomScale *ratioAspect;
scroll.maximumZoomScale = scroll.maximumZoomScale *ratioAspect;
[scroll setZoomScale:(scroll.zoomScale*ratioAspect) animated:YES];
}
}
break;
}
}
Hope this helps!