One of my app's functions is to present PDF file (from app bundle) in a UIWebView.
On my iPhone it works fine, but I've got some reports that on other devices PDF file isn't presented.
What could be the problem? Could it have something to do with iOS version on those devices?
This is how I present the file inside the app:
NSString *pdfPath = [[NSBundle mainBundle] pathForResource:self.fileName ofType:#".pdf"];
if (!pdfPath) {
Helper* h = [[Helper alloc]init];
pdfPath = [h filesinADocumentFolder:self.fileName];
}
self.pdfUrl = [NSURL fileURLWithPath:pdfPath];
[self.webView1 loadRequest:[NSURLRequest requestWithURL:pdfUrl]];
[self.webView1 setBackgroundColor:[UIColor clearColor]];
[self.webView1 setOpaque:NO];
Related
I have an image and I want to export it to Instagram, so I can post it.
The code I'm using is:
NSURL *instagramURL = [NSURL URLWithString:#"instagram://location?id=1"];
if ([[UIApplication sharedApplication] canOpenURL:instagramURL]) {
NSString *documentsDirectory = [NSHomeDirectory() stringByAppendingPathComponent:#"Documents"];
NSString *savedImagePath = [documentsDirectory stringByAppendingPathComponent:#"Image.igo"];
UIImage *image = [UIImage imageNamed:#"01.png"];
NSData *imageData = UIImagePNGRepresentation(image);
[imageData writeToFile:savedImagePath atomically:YES];
NSURL *imageUrl = [NSURL fileURLWithPath:savedImagePath];
NSLog(#"%#",imageUrl);
UIDocumentInteractionController *docController = [[UIDocumentInteractionController alloc] init];
docController.delegate = self;
docController.UTI = #"com.instagram.exclusivegram";
docController.URL = imageUrl;
//[docController setURL:imageUrl];
[docController presentOpenInMenuFromRect:CGRectZero inView:self.view animated:YES];
}
When I run the app, the App shows the button written "Instagram" its icon, but when I touch it, the button disappear, and nothing happens. The app didn't crash, but nothing happen.
What I missed in my code ?
Regards
Bruno
I guess the problem is you do not retain the UIDocumentInteractionController. Make an ivar for it in your class.
Make sure the method documentInteractionController:didEndSendingToApplication: is called on the delegate.
Also check out the Instagram documentation: http://instagram.com/developer/iphone-hooks/
When triggered, Instagram will immediately present the user with our
filter screen. The image is preloaded and sized appropriately for
Instagram. Other than using the appropriate image format, described
above, our only requirement is that the image is at least 612px tall
and/or wide. For best results, Instagram prefers opening a JPEG that
is 612px by 612px square. If the image is larger, it will be resized
dynamically.
To verify that Instagram is installed check for the URL instagram://app. The URL instagram://location?id=LOCATION_ID is intended for location feeds only!
I'm creating an Mac app that loads some content from a URL in a WebView and then needs to save the content to a file. The content may and may not be HTML. Loading works fine, the problem is to get the content from the WebView. How do I do that?
Thanks!
I do not know if you use WebView (MacOS) or UIWebVoew (iOS...). I use the following code (in MacOS) which works well for me:
WebFrame *frame = [myWebView mainFrame];
WebDataSource *source = [frame dataSource];
NSData *data = [source data];
NSString *str = [[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding] autorelease];
[someTextView setString:str]; // shows the content of myWebView as string
I have a file path to a pdf and I want it to open in Preview. Also, I want finder to launch highlighting the file.
On iOS I would do:
UIApplication app = [UIApplication sharedApplication];
[app openURL:url];
But I have no idea what's the alternative in Cocoa app.
Thanks
You should look at NSWorkspace
NSString* path = [[NSString alloc] initWithBytes:installerPath.str() length:installerPath.dataLength() encoding:NSUTF16LittleEndianStringEncoding];
[[NSWorkspace sharedWorkspace] openFile:path];
[path release];
I recently stumbled upon the following interesting feature: Instagram iPhone Hooks
I was wondering if one is able to open an app through the documentinteractioncontroller immediately, WITHOUT having to show a preview (– presentPreviewAnimated:) or an action sheet (– presentOpenInMenuFromRect:inView:animated:). Seems to me that it's the only way, but I might be missing something.
-(void) saveToInstagram {
NSURL *url;
UIDocumentInteractionController *dic;
CGRect rect = CGRectMake(0 ,0 , 0, 0);
UIImage *i = imageView.image;
CGRect cropRect = CGRectMake(i.size.width - 306 ,i.size.height - 306 , 612, 612);
NSString *jpgPath = [NSHomeDirectory() stringByAppendingPathComponent:#"Documents/Test.ig"];
CGImageRef imageRef = CGImageCreateWithImageInRect([imageView.image CGImage], cropRect);
UIImage *img = [[UIImage alloc] initWithCGImage:imageRef];
CGImageRelease(imageRef);
[UIImageJPEGRepresentation(img, 1.0) writeToFile:jpgPath atomically:YES];
url = [[NSURL alloc] initFileURLWithPath:jpgPath];
dic = [self setupControllerWithURL:url usingDelegate:self];
[dic presentOpenInMenuFromRect:rect inView:self.view animated:YES];
[dic retain];
[img release];
[url release];
}
- (UIDocumentInteractionController *) setupControllerWithURL: (NSURL*) fileURL usingDelegate: (id <UIDocumentInteractionControllerDelegate>) interactionDelegate {
UIDocumentInteractionController *interactionController = [UIDocumentInteractionController interactionControllerWithURL: fileURL];
interactionController.delegate = interactionDelegate;
return interactionController;
}
- (void)documentInteractionControllerWillPresentOpenInMenu:(UIDocumentInteractionController *)controller {
}
First save your JPEG with a .ig or .igo extension instead of .jpg or .jpeg then create a NSURL with a file:// directive. Also I used the .igo extension and the UTI com.instagram.exclusivegram for exclusivity to Instagram but you can use the .ig extension and the UTI com.instagram.gram
For Example:
// URL TO THE IMAGE FOR THE DOCUMENT INTERACTION
NSURL *igImageHookFile = [[NSURL alloc] initWithString:[[NSString alloc] initWithFormat:#"file://%#", jpgPath]];
docInteractionController.UTI = #"com.instagram.exclusivegram";
[self setupDocumentControllerWithURL:igImageHookFile];
// OPEN THE HOOK
[docInteractionController presentOpenInMenuFromRect:self.frame inView:self animated:YES];
The only way to do it would be if Instagram registers a custom URL handler (e.g. igram://) and can accept data either as part of that URL (e.g. base64 encoded) or via the pasteboard.
Basically the limitations that UIDocumentInteractionController (and this technique) workaround are:
Apps are not allowed to query for or directly launch other apps.
Apps cannot generally open files from the sandboxed user directory of other apps.
I need to access the iphone APIs to read a multipage TIFF image file format, dose anyone know how:, if not how can I build and use the open source libtiff on iphone/xcode.
I've created my own solution for this: NSTiffSplitter.
You can find it on github.
NSString *pathToImage = [[NSBundle mainBundle] pathForResource:#"Example" ofType:#"tiff"];
NSTiffSplitter* splitter = [[NSTiffSplitter alloc] initWithPathToImage:pathToImage];
UIImage *page = [[UIImage alloc] initWithData:[splitter dataForImage:page]];
yourImageView.image = page;
[page release];