how to choose PDF file in IOS - ios

Question

I searched online and GitHub and couldn't find a way to properly select a PDF in IOS like with an image or video. For example, I can open and select a photo (select the photo with other methods that hadle it) like this:
self.logoImagePicker = [[UIImagePickerController alloc] init];
self.logoImagePicker.delegate = self;
[self.logoImagePicker setSourceType:UIImagePickerControllerSourceTypePhotoLibrary];
[self presentViewController:self.logoImagePicker animated:YES completion:nil];
I've attempted this:
// Present PDF;s from which to choose
UIDocumentInteractionController *pdfPicker = [[UIDocumentInteractionController alloc] init];
pdfPicker.delegate = self; // ensure you set the delegate so when a PDF is chosen the right method can be called
[self presentViewController:pdfPicker animated:YES completion:nil];
But i get an error here:
#import <UIKit/UIKit.h>
#import "AppDelegate.h"
int main(int argc, char * argv[]) {
#autoreleasepool {
return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
}
}
With this error output:
2016-08-10 07:40:59.190 Whats New[55195:1962738] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'No available types for source 0'
*** First throw call stack:
(
0 CoreFoundation 0x00ef1494 __exceptionPreprocess + 180
1 libobjc.A.dylib 0x0060fe02 objc_exception_throw + 50
2 UIKit 0x01eb9dc2 -[UIImagePickerController mediaTypes] + 0
3 Whats New 0x000c6253 -[SellerHomePageViewController choosePdfBtn:] + 243
4 libobjc.A.dylib 0x006240b5 -[NSObject performSelector:withObject:withObject:] + 84
5 UIKit 0x01ab0e38 -[UIApplication sendAction:to:from:forEvent:] + 118
6 UIKit 0x01ab0db7 -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 64
7 UIKit 0x01c54f3b -[UIControl sendAction:to:forEvent:] + 79
8 UIKit 0x01c552d4 -[UIControl _sendActionsForEvents:withEvent:] + 433
9 UIKit 0x01c542c1 -[UIControl touchesEnded:withEvent:] + 714
10 UIKit 0x02037d2e _UIGestureRecognizerUpdate + 12763
11 UIKit 0x01b30efd -[UIWindow _sendGesturesForEvent:] + 1559
12 UIKit 0x01b325b6 -[UIWindow sendEvent:] + 1137
13 UIKit 0x01ad3be8 -[UIApplication sendEvent:] + 266
14 UIKit 0x01aa8769 _UIApplicationHandleEventQueue + 7795
15 CoreFoundation 0x00e03e5f __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15
16 CoreFoundation 0x00df9aeb __CFRunLoopDoSources0 + 523
17 CoreFoundation 0x00df8f08 __CFRunLoopRun + 1032
18 CoreFoundation 0x00df8846 CFRunLoopRunSpecific + 470
19 CoreFoundation 0x00df865b CFRunLoopRunInMode + 123
20 GraphicsServices 0x05aa5664 GSEventRunModal + 192
21 GraphicsServices 0x05aa54a1 GSEventRun + 104
22 UIKit 0x01aaeeb9 UIApplicationMain + 160
23 Whats New 0x000d1e4a main + 138
24 libdyld.dylib 0x03cc4a25 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
Is there something similar to choosing photos but only for PDF's?

Answer 1

1- There is no native control for like UIImagePicker that lets you pick a PDF.
2- You have no access to PDFs in the iphone since unlike android, there is no Explorer.
If you want to save PDFs you should save them as coreData in your app, and you should make a UITableView or UICOllectionView with a view for each PDF as a PDF Picker. Keep in mind this will stay within the context of the app as IOS behaves differently than android