Objective-C Requires Chilkat v11.7.0+

Get the Text Block Below a PDF Caption

See more PDF Text Extraction Examples

Demonstrates the "label" option with labelValue "below", which captures the block of text directly under a caption such as "Ship To", ending at the next gap or heading. Combined with layout "lines", the lines of an address block are kept separate. Objective-C

#import <CkoPdf.h>
#import <CkoJsonObject.h>

BOOL success = NO;

//  This example requires the Chilkat API to have been previously unlocked.
//  See Global Unlock Sample for sample code.

//  The packing slip used in this example is available at packing_slip.pdf

CkoPdf *pdf = [[CkoPdf alloc] init];
success = [pdf LoadFile: @"qa_data/pdf/packing_slip.pdf"];
if (success == NO) {
    NSLog(@"%@",pdf.LastErrorText);
    return;
}

CkoJsonObject *json = [[CkoJsonObject alloc] init];
CkoJsonObject *jsonOut = [[CkoJsonObject alloc] init];

//  The packing slip has the captions "Bill To" and "Ship To" side by side,
//  each with an address block below it.
[json UpdateString: @"label" value: @"Ship To"];

//  "below" means the value is the block of text directly under the label.
[json UpdateString: @"labelValue" value: @"below"];

//  With the default "flow" layout the lines of the block would be joined into one paragraph.
//  "lines" keeps each line of the address on its own line.
[json UpdateString: @"layout" value: @"lines"];

success = [pdf ExtractText: @"text" jsonIn: json jsonOut: jsonOut];
if (success == NO) {
    NSLog(@"%@",pdf.LastErrorText);
    return;
}

NSLog(@"%@",@"Ship To:");
NSLog(@"%@",[jsonOut StringOf: @"text"]);
NSLog(@"%@",@"");

[json UpdateString: @"label" value: @"Bill To"];
success = [pdf ExtractText: @"text" jsonIn: json jsonOut: jsonOut];
if (success == NO) {
    NSLog(@"%@",pdf.LastErrorText);
    return;
}

NSLog(@"%@",@"Bill To:");
NSLog(@"%@",[jsonOut StringOf: @"text"]);
NSLog(@"%@",@"");

//  A caption over a short paragraph works the same way.  Here the flow layout is better,
//  because the two lines are one piece of text.
[json UpdateString: @"label" value: @"Special Instructions"];
[json UpdateString: @"layout" value: @"flow"];
success = [pdf ExtractText: @"text" jsonIn: json jsonOut: jsonOut];
if (success == NO) {
    NSLog(@"%@",pdf.LastErrorText);
    return;
}

NSLog(@"%@",@"Special Instructions:");
NSLog(@"%@",[jsonOut StringOf: @"text"]);

//  Sample output:

//  Ship To:
//  Frank Delgado
//  c/o Harbor Pet Boarding
//  9 Ferry Lane
//  Portside, WA 98001
//  
//  Bill To:
//  Frank Delgado
//  Apartment 3B
//  41 Mill Street
//  Portside, WA 98000
//  
//  Special Instructions:
//  Leave the carton with the boarding office if no one answers. Do not leave it outside; the cat tree is not packed for rain.