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Guides
Objective-C

Objective-C & macOS PDF library integration

This guide will help you run PDFTron samples and integrate a free trial of the PDFTron SDK into Obj-C applications on macOS. Your free trial includes unlimited trial usage and support from solution engineers.

Prerequisites

  • Xcode
  • PDFTron's Objective-C PDF library for macOS:

Run PDFTron SDK in production
A commercial license key is required for use in a production environment. Please fill out our licensing form if you do not have a valid license key.
Keep your commercial license key confidential.
License keys are uniquely generated. Please make sure that it is not publicly available (e.g. in your public GitHub).

Initial setup

  1. Download the PDFTron SDK.
  2. Extract the downloaded zip file and navigate to it.
  3. Get your PDFTron trial key.
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Run the samples

Run a specific sample

  1. Navigate to the OBJC folder in a sample project, for example /Samples/AddImageTest/OBJC and run the sample with
./RunTest.sh

Run all samples

  1. Navigate to /Samples and run
./runall_objc.sh

The tests will run one by one.

Output files will be in /Samples/TestFiles/Output

Integrate into your application

This section will show you how to use our SDK to create a simple PDFTron "Hello World!" application. It will create a document with one blank page and save it as a linearized PDF in its running directory.

  1. Navigate to the /Samples directory of the PDFTron SDK and create a directory called myApp if it does not exist already. This guide will assume your project is named myApp.

  2. Enter your myApp directory and create a OBJC directory for organization. Then create a myApp.m file. Open this file in your favorite text editor and paste:

//@data {"ga":7331024761}// #import <OBJC/PDFNetOBJC.h> #import <Foundation/Foundation.h>

int main (int argc, const char * argv[])
{
    @autoreleasepool {
        int ret = 0;
        [PTPDFNet Initialize: 0];  // PDFNet must be initialized before accessing any PDFTron API

        PTPDFDoc* doc = [[PTPDFDoc alloc] init];
        PTPDFRect * rect = [[PTPDFRect alloc] init];
        [rect Set: 0 y1: 0 x2: 612 y2: 792];
        PTPage* page = [doc PageCreate: rect];  // Start a new page
        [doc PagePushBack: page];   // Add the page to the document
        [doc SaveToFile: @"output.pdf" flags: e_ptlinearized];
        NSLog(@"Hello World!");
        return ret;
    }
}
```
  1. In that same OBJC directory inside your myApp project folder add a makefile called Makefile and paste this inside:

//@data {"ga":6546002858}// TESTNAME=myApp CC=clang TARGET=$(TESTNAME) INCLUDES=-I../../../Headers CFLAGS=-fobjc-exceptions -fobjc-arc LIBS=-L../../../Lib -lPDFNetC -framework Foundation LDFLAGS=-Wl,-rpath,../../../Lib

$(TARGET): $(TARGET).m.o
    @echo "Linking target: $(TARGET)"
    $(CC) -o $@ $< $(LIBS) $(LDFLAGS)

$(TARGET).m.o: $(TARGET).m
    @echo "Compiling target: $(TARGET)"
    $(CC) -c $< -o $@ $(CFLAGS) $(INCLUDES)

all: $(TARGET)

clean:
    rm -fr $(TARGET) *.o

rebuild: clean all

.PHONY: all clean rebuild
```
  1. Run the project by executing:

//@data {"ga":2054524558}// make ```

followed by:

```shell

//@data {"ga":1503353542}// ./myApp ```

If all goes well, your terminal should output:

```

//@data {"ga":1866078370}// PDFNet is running in demo mode. Permission: write Hello World! ```

Check the output.pdf that the program output in the same directory. It should be a PDF with one blank page.

Next step

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