How do I open a PDF document from a specified PDF file path using PDF SDK for iOS?

Foxit PDF SDK for Android provides multiple interfaces to open a PDF document. You can open a PDF document from a specified PDF file path, or from a memory buffer. For from a specified PDF file path, there are two ways to do that.

The first one is that just use the openDoc interface, which includes the operations of creating a PDF document object (initWithPath), loading the document content (load), and setting the PDF document object to view control (setDoc). Following is the sample code:

Note: The openDoc interface is only available for opening a PDF document from a file path. If you want to customize to load a PDF document, you can implement it in the callback function (FSFileReadCallback), and then create a document object with a FireRead instance using initWithHandler. Next, also load the document content using load, and set the PDF document object to view control using setDoc.

#import "ViewController.h"
#import <foxitrdk /FSPDFViewControl.h>

@interface ViewController : UIViewController
@end
@implementation ViewController
{ 
    FSPDFViewCtrl* pdfViewCtrl;
}
- (void)viewDidLoad {
    [super viewDidLoad];
    
    // Get the path of a PDF.
    NSString* pdfPath = [[NSBundle mainBundle] pathForResource:@"Sample" ofType:@"pdf"];
  
    // Initilize a FSPDFViewCtrl object with the size of the entire screen.
    pdfViewCtrl = [[FSPDFViewCtrl alloc] initWithFrame: [self.view bounds]];
    
    // Open an unencrypted PDF document from a specified PDF file path.
    [pdfViewCtrl openDoc:pdfPath password:nil completion:nil];
    
    // Add the pdfView to the root view.
    [self.view addSubview:pdfViewCtrl];    
}
@end
</foxitrdk>

The second one is that use the initWithPath interface to create a PDF document object, use load interface to load the document content, and then use setDoc to set the PDF document object to view control. Following is the sample code:

#import "ViewController.h"
#import <foxitrdk /FSPDFViewControl.h>

@interface ViewController : UIViewController
@end
@implementation ViewController
{
FSPDFViewCtrl* pdfViewCtrl;
}
- (void)viewDidLoad {
[super viewDidLoad];

// Get the path of a PDF.
NSString* pdfPath = [[NSBundle mainBundle] pathForResource:@"Sample" ofType:@"pdf"];

// Initialize a PDFDoc object with the path to the PDF file.
FSPDFDoc* pdfdoc = [[FSPDFDoc alloc] initWithPath: pdfPath];

// Load the unencrypted document content.
if(FSErrSuccess != [pdfdoc load:nil]) {
return;
}

// Initilize a FSPDFViewCtrl object with the size of the entire screen.
pdfViewCtrl = [[FSPDFViewCtrl alloc] initWithFrame: [self.view bounds]];

// Set the document to view control.
[pdfViewCtrl setDoc:pdfdoc];

// Add the pdfView to the root view.
[self.view addSubview:pdfViewCtrl]; 
}
@end
</foxitrdk>