Create a Multipage File from Multiple Images - macOS Swift Console

This tutorial shows how to merge images into one multipage TIFF file with theRasterCodecsclass in a macOS Swift Console application using the LEADTOOLS SDK.

Required Knowledge

Get familiar with the basic steps of creating a project by reviewing theAdd References and Set a Licensetutorial, before working on theCreate a Multipage File from Multiple Images - macOS Swift Consoletutorial.

Create the Project and Add LEADTOOLS References

从项目中创建的副本Add References and Set a Licensetutorial. If you do not have that project, follow the steps in that tutorial to create it.

The references needed depend upon the purpose of the project. This tutorial requires the following Framework references located at\LEADTOOLS22\Bin\Xcode\Frameworks\macOS:

• Leadtools.framework
• Leadtools.Codecs.framework
• Leadtools.Codecs.Cmp.framework

Edit theLeadtools-Bridging-Header.hfile to add the following imports:

#import 

For a complete list of which files are required for your application, refer toFiles to be Included in your Application.

Set the License File

The License unlocks the features needed for the project. It must be set before any toolkit function is called. For details, including tutorials for different platforms, refer toSetting a Runtime License.

There are two types of runtime licenses:

• Evaluation license, obtained at the time the evaluation toolkit is downloaded. It allows the toolkit to be evaluated.
• Deployment license. If a Deployment license file and developer key are needed, refer toObtaining a License.

Note

Adding LEADTOOLS references and setting a license are covered in more detail in theAdd References and Set a Licensetutorial.

Add the Merge Image Code

With the project created, the references added, and the license set, coding can begin.

Using theProject Navigator, openmain.swift. Below the call toSetLicense(), add an array of string values that will contain the files to merge. Below the new array, add the code below.

SetLicense()var files:[String] = []let imageDir: String ="/path/to/LEADTOOLS22/Resources/Images"forfileintryFileManager.default.contentsOfDirectory(atPath: imageDir) {let fileURL = URL(fileURLWithPath: file)iffileURL.pathExtension =="cmp"{files.append(imageDir +"/"+ file)}}let multipageFile ="/path/to/LEADTOOLS22/Resources/Images/merged.tif"MergeFiles(files: files, outputFile: multipageFile)

For the purposes of this tutorial, the array will contain all the CMP files in the/LEADTOOLS22/Resources/Imagesdirectory.

Add a new function tomain.swiftnamedMergeFiles(files: [String], outputFile: String). call this function as shown above. Add the code below to the new function to load each of the CMP files appending each file to make a multipage TIFF file.

func MergeFiles(files: [String], outputFile: String) {let codecs: LTRasterCodecs = LTRasterCodecs()forfileinfiles {print("Adding file: \(file)")do{let image: LTRasterImage =trycodecs.load(file: file)trycodecs.save(image, file: outputFile, format: LTRasterImageFormat.tifJpeg411, bitsPerPixel: 0, firstPage: 1, lastPage: -1, firstSavePageNumber: 1, pageMode: LTCodecsSavePageMode.append)}catch{print(error.localizedDescription)}}}

Run the Project

Clean the project to clear any errors by selectingProduct -> Clean Build FolderorShift + Command + K.

Run the project by selectingProduct -> RunorCommand + R.

If the steps were followed correctly, the application runs and either creates a new file namedmerged.tif, or appends pages to that file if it already exists. This file should contain all the CMP images from the LEADTOOLS Images directory.

Wrap-up

This tutorial showed how to save TIFF images as well as how to merge images into a multipage file.

See Also

• LEADTOOLS RasterImage Documentation
• LEADTOOLS RasterCodecs Documentation
• LEADTOOLS SDK Download