PDF opens on the iPhone, but not on the iPad - iphone

Question

I have an HTML document with a link that runs JavaScript code:
<a href="http://www.tricedesigns.com/temp/drm.pdf" onclick="app.openExternalDoc();">Open pdf</button>
<script type="text/javascript" src="../assets/js/index.js"></script>
<script type="text/javascript" src="../assets/js/ExternalFileUtil.js"></script>
<script type="text/javascript">
app.initialize();
</script>
<script src="../cordova.js"></script>
The index.js All this works fine
As does the ExternalFileUtil.js.
Here is the CDVExternalFileUtil.h file:
#import <Cordova/CDV.h>
#interface CDVExternalFileUtil : CDVPlugin <UIDocumentInteractionControllerDelegate> {
NSString *localFile;
}
- (void) openWith:(NSMutableArray*)arguments withDict:(NSMutableDictionary*)options;
- (void) cleanupTempFile: (UIDocumentInteractionController *) controller;
#end
And here is the CDVExternalFileUtil.m file:
#import "CDVExternalFileUtil.h"
#implementation CDVExternalFileUtil
- (void) openWith:(NSMutableArray*)arguments withDict:(NSMutableDictionary*)options
{
CDVPluginResult* pluginResult;
NSString* callbackID = [arguments pop];
[callbackID retain];
NSString *path = [arguments objectAtIndex:0];
[path retain];
NSString *uti = [arguments objectAtIndex:1];
[uti retain];
NSLog(#"path %#, uti:%#", path, uti);
NSArray *parts = [path componentsSeparatedByString:#"/"];
NSString *previewDocumentFileName = [parts lastObject];
NSLog(#"The file name is %#", previewDocumentFileName);
NSData *fileRemote = [[NSData alloc] initWithContentsOfURL:[NSURL URLWithString:path]];
// Write file to the Documents directory
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
if (!documentsDirectory) {NSLog(#"Documents directory not found!");}
localFile = [documentsDirectory stringByAppendingPathComponent:previewDocumentFileName];
[localFile retain];
[fileRemote writeToFile:localFile atomically:YES];
NSLog(#"Resource file '%#' has been written to the Documents directory from online", previewDocumentFileName);
The problem seems to be around this area (as it works on iPhone, but not iPad so I assume its something to do with the layout, Here is another similar question
// Get file again from Documents directory
NSURL *fileURL = [NSURL fileURLWithPath:localFile];
UIDocumentInteractionController *controller = [UIDocumentInteractionController interactionControllerWithURL:fileURL];
controller.delegate = self;
controller.UTI = uti;
[controller retain];
CDVViewController* cont = (CDVViewController*)[ super viewController ];
CGRect rect = CGRectMake(0, 0, cont.view.bounds.size.width, cont.view.bounds.size.height);
[controller presentOptionsMenuFromRect:rect inView:cont.view animated:YES];
pluginResult = [CDVPluginResult resultWithStatus:CDVCommandStatus_OK messageAsString: #""];
[self writeJavascript: [pluginResult toSuccessCallbackString:callbackID]];
[callbackID release];
[path release];
[uti release];
}
- (void) documentInteractionControllerDidDismissOpenInMenu:(UIDocumentInteractionController *)controller {
NSLog(#"documentInteractionControllerDidDismissOpenInMenu");
[self cleanupTempFile:controller];
}
- (void) documentInteractionController: (UIDocumentInteractionController *) controller didEndSendingToApplication: (NSString *) application {
NSLog(#"didEndSendingToApplication: %#", application);
[self cleanupTempFile:controller];
}
- (void) cleanupTempFile: (UIDocumentInteractionController *) controller
{
NSFileManager *fileManager = [NSFileManager defaultManager];
NSError *error;
BOOL fileExists = [fileManager fileExistsAtPath:localFile];
NSLog(#"Path to file: %#", localFile);
NSLog(#"File exists: %d", fileExists);
NSLog(#"Is deletable file at path: %d", [fileManager isDeletableFileAtPath:localFile]);
if (fileExists)
{
BOOL success = [fileManager removeItemAtPath:localFile error:&error];
if (!success) NSLog(#"Error: %#", [error localizedDescription]);
}
[localFile release];
[controller release];
}
#end
Sorry for the large amount of code, I have been stuck on this View/Download PDF for 5 days now, Any help would be great