Objective-C

Extract PDF from JSON

See more JSON Examples

Demonstrates how to extract a PDF file contained within JSON. The file is represented as a base64 string within the JSON. Note: This example can extract any type of file, not just a PDF file. Objective-C

#import <CkoJsonObject.h>
#import <CkoStringBuilder.h>
#import <CkoBinData.h>

BOOL success = NO;

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

//  Load the JSON.
success = [json LoadFile: @"qa_data/json/JSR5U.json"];
if (success != YES) {
    NSLog(@"%@",json.LastErrorText);
    return;
}

//  The JSON we loaded contains this:

//  	{
//  	...
//  	...
//  	  "data": {
//  	    "content": "JVBERi0xLjQ..."
//  	  }
//  	...
//  	...
//  	}

CkoStringBuilder *sb = [[CkoStringBuilder alloc] init];
[json StringOfSb: @"data.content" sb: sb];

CkoBinData *bd = [[CkoBinData alloc] init];
[bd AppendEncodedSb: sb encoding: @"base64"];

success = [bd WriteFile: @"qa_output/a0015.pdf"];