Implementation of Document Pickers or Pick an iCloud document...

Implementation of  Document Pickers...

  https://www.macstories.net/tutorials/implementing-ios-8-document-pickers/

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController<UIDocumentInteractionControllerDelegate>

@property UIDocumentInteractionController *documentInteractionController;

@end

#import "ViewController.h"

@interface ViewController ()<UIDocumentPickerDelegate>

- (IBAction)clickAction:(id)sender;

@property (strong, nonatomic) IBOutlet UIImageView *image;

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view, typically from a nib.

    

}

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

- (IBAction)clickAction:(id)sender {

    

    UIDocumentPickerViewController *documentPicker = [[UIDocumentPickerViewController alloc] initWithDocumentTypes:@[@"public.composite-content"] inMode:UIDocumentPickerModeOpen];

    documentPicker.delegate = self;

    documentPicker.modalPresentationStyle = UIModalPresentationFormSheet;

    [self presentViewController:documentPicker animated:YES completion:nil];

}

- (UIViewController *)documentInteractionControllerViewControllerForPreview:(UIDocumentInteractionController *)controller;{

    return self;

}

- (void)documentPicker:(UIDocumentPickerViewController *)controller didPickDocumentAtURL:(NSURL *)url{

    NSLog(@"-->%@<---->%@",url.absoluteString,url.lastPathComponent);

    

    

    NSString *path = [url path];

    NSData *data = [[NSFileManager defaultManager] contentsAtPath:path];

    

    NSString *base64String = [data base64EncodedStringWithOptions:0];

    base64String = [base64String stringByReplacingOccurrencesOfString:@"/"

                                                           withString:@"_"];

    

    base64String = [base64String stringByReplacingOccurrencesOfString:@"+"

                                                           withString:@"-"];

    

//    NSLog(@"---->>%@",base64String);

    

    UIImage *image = [UIImage imageWithData:data];

    [_image setImage:image];

    

    /*This is for preview*/

    

    self.documentInteractionController = [UIDocumentInteractionController interactionControllerWithURL:url];

    

    // Configure Document Interaction Controller

    [self.documentInteractionController setDelegate:self];

    

    // Preview PDF

    [self.documentInteractionController presentPreviewAnimated:YES];

}

@end