I work for a media company, and in our iPad application we're upgrading our content so it looks better. Previously, we used a UILabel to display the contents of our posts. I used this to get the actual height of my UILabel:
CGSize expectedSize = [label.text sizeWithFont:label.font
constrainedToSize:maximumLabelSize lineBreakMode:label.lineBreakMode];
However, we changed our posts' content to HTML, so I'm using a UIWebView. Is there a way to find the true height of the UIWebView, like I do with the UILabel?
Unlike with a plain string, you'll probably only be able to get the height once the web view finishes rendering. Here's how you can do it in a web view delegate method:
- (void)webViewDidFinishLoad:(UIWebView *)webview
{
NSString *heightString = [webview stringByEvaluatingJavaScriptFromString:
#"document.body.clientHeight"];
int height = [heightString intValue];
...
}
Related
I'm trying to integrate MFSideMenu in my project but I don't want to adopt the approach described in the GitHub depository as it defines the menu in the app delegate.
I have a login screen which will introduce a navigation controller with the main page as reported in this picture
I would like to add the support for MFSideMenu in the navigationcontroller root controller using this code:
- (id)initWithCoder:(NSCoder *)aDecoder {
self = [super initWithCoder:aDecoder];
if (self) {
// Custom initialization
self.sideMenuController = [[SideMenuViewController alloc] init];
UINavigationController *navigationController = self.navigationController;
MFSideMenuOptions options = MFSideMenuOptionMenuButtonEnabled|MFSideMenuOptionBackButtonEnabled
|MFSideMenuOptionShadowEnabled;
MFSideMenuPanMode panMode = MFSideMenuPanModeNavigationBar|MFSideMenuPanModeNavigationController;
MFSideMenu *sideMenu = [MFSideMenu menuWithNavigationController:navigationController
sideMenuController:sideMenuController
location:MFSideMenuLocationLeft
options:options
panMode:panMode];
sideMenuController.sideMenu = sideMenu;
}
return self;
}
When I run the app the menu button appears in my navigation bar and everything seems working fine but,if I introduce the navigation controller through a modal segue (i.e. a login screen which goes to the navigation controller in case of a correct login) the button disappears.
Any idea about how to fix it?
I have a view based application (no storyboards) with a button that presents a modal view with a webview in it. The webview loads a YouTube video and the user taps it and watches the video in full screen.
When the video ends (or the user taps "done"), the video player dismisses, but for some reason I see the Main View instead of the modal view controller (and I can't invoke the modal view again with the button, although the IBAction is being called)...
The present modal view code (in the Main View controller):
SomeViewController *controller = [[[SomeViewController alloc] initWithNibName:#"SomeViewController_iPhone" bundle:nil] autorelease];
controller.delegate = self;
controller.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentModalViewController:controller animated:YES];
Then, in "SomeViewController", I have a UIWebView that loads the YouTube video:
- (void)embedYouTube:(NSString *)urlString frame:(CGRect)frame {
NSString *embedHTML = #"\
<html><head>\
<style type=\"text/css\">\
body {\
background-color: transparent;\
color: white;\
}\
</style>\
</head><body style=\"margin:0\">\
<embed id=\"yt\" src=\"%#\" type=\"application/x-shockwave-flash\" \
width=\"%0.0f\" height=\"%0.0f\"></embed>\
</body></html>";
NSString *html = [NSString stringWithFormat:embedHTML, urlString, frame.size.width, frame.size.height];
[self.webView loadHTMLString:html baseURL:nil];
}
The video plays just fine, but when it's done, it's get dismissed and the Main View is being showed instead of the Modal View (SomeViewController).
No error is being given though.
From what I understand, the video player is also a modal view, so the hierarchy is something like this:
-- Main View
---- Modal View (SomeViewController with WebView)
-------- Video Modal View (invoked by the WebView)
So I don't get why is the Main View controller being shown after the Video is done playing, and why it doesn't let me invoke the modal view controller again...
Thanks for any help!
//Move to bookmarked place if page is opened from bookmark section.
- (void)webViewDidFinishLoad:(UIWebView *)webView1;
{
if(chkview == 2)
{
//Move webview to chkScrollValue position.
[webView stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:#"document.body.scrollTop = %d", chkScrollValue]];
// [webView stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:#"window.scrollBy(0,%d);",chkScrollValue]];
}
}
I'm loading my webview which was displaying html which was in resources folder and it was working fine. Now, i'm using javascript with html and this is not working anymore.
I got the solution. I was performing this task after webViewDidFinishLoad. Rather than that now I added another function and added this code in function
[self performSelector:#selector(loadBookmark) withObject:nil afterDelay:0.4];
I have disable default call out action sheet from UIWebView by using this -
[webView stringByEvaluatingJavaScriptFromString:#"document.body.style.webkitTouchCallout='none';"];
it's working fine but the main problem is that when i tap on an image for a long time a zoom lens of UIWebView comes there and i want to disable it, is it possible? then how?
Yes a few ways but some of which are buggy.
If you don't care about userinteraction at all you can just disabled it. Then they will only be able to zoom and move around the page (but not click any links or anything).
-(void)removeInput{
UIScrollView *webViewContentView;
for (UIView *checkView in [webView subviews] ) {
if ([checkView isKindOfClass:[UIScrollView class]]) {
webViewContentView = (UIScrollView*)checkView;
break;
}
}
for (UIView *checkView in [webViewContentView subviews] ) {
checkView.userInteractionEnabled = NO;
}
}
UIWebView without Copy/Paste and selection rectangle when showing documents
However that causes all userInteraction to be disabled which might not be what you want?
To JUST disable the magnifying glass I don't think is possible (though I might be wrong?).
Ok if you don't mind disabling the text selection as well you can try this.
ObjC
[webView stringByEvaluatingJavaScriptFromString:#"document.onmousedown = function() {return false;}"];
JavaScript
document.onselectstart = function() {return false;} // ie
document.onmousedown = function() {return false;}
Source:
http://javascript.internet.com/page-details/disable-text-selection.html
I'm using a custom pixel font on the iPad SDK, and I'm trying to find a way to disable font anti-aliasing for UIFont. Pixel fonts usually work best when they don't have Anti-aliasing. I disable it easily in Photoshop when I create static resources, but this time I need a dynamic output with the custom font.
Any ideas if this is even possible?
Thanks.
Something like this might work if you are subclassing a UILabel or similar:
-(void) drawRect:(CGRect)r {
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSaveGState( context );
CGContextSetShouldSmoothFonts( context , false );
[super drawRect:r];
CGContextRestoreGState( context );
}
If that does not work you can try these calls too:
CGContextSetAllowsAntialiasing( context , false );
CGContextSetShouldAntialias( context , false );