Simplifying the font picker for text annotation using Swift for iOS

1
//
2
//  Copyright © 2021-2026 PSPDFKit GmbH. All rights reserved.
3
//
4
//  The Nutrient sample applications are licensed with a modified BSD license.
5
//  Please see License for details. This notice may not be removed from this file.
6
//
7

8
import PSPDFKit
9
import PSPDFKitUI
10

11
class SimpleFontPickerExample: Example {
12

13
    override init() {
14
        super.init()
15
        title = "Simple Font Picker"
16
        contentDescription = "Shows how to limit the choices of fonts in the font picker."
17
        category = .viewCustomization
18
    }
19

20
    override func invoke(with delegate: ExampleRunnerDelegate) -> UIViewController? {
21
        let freeTextAnnotation = FreeTextAnnotation(contents: "This is a test free-text annotation.")
22
        freeTextAnnotation.fillColor = .white
23
        freeTextAnnotation.fontSize = 30
24
        freeTextAnnotation.boundingBox = CGRect(x: 300, y: 300, width: 150, height: 150)
25
        freeTextAnnotation.sizeToFit()
26

27
        let document = AssetLoader.writableDocument(for: .annualReport, overrideIfExists: true)
28
        document.add(annotations: [freeTextAnnotation])
29

30
        return PDFViewController(document: document) { builder in
31
            builder.overrideClass(FontPickerViewController.self, with: SimpleFontPickerViewController.self)
32
        }
33
    }
34

35
}
36

37
private class SimpleFontPickerViewController: FontPickerViewController {
38

39
    private static let defaultFontFamilyDescriptors: [UIFontDescriptor] = {
40
        ["Arial", "Calibri", "Times New Roman", "Courier New", "Helvetica", "Comic Sans MS"].map {
41
            UIFontDescriptor(fontAttributes: [.name: $0])
42
        }
43
    }()
44

45
    override init(fontFamilyDescriptors: [UIFontDescriptor]?) {
46
        super.init(fontFamilyDescriptors: fontFamilyDescriptors ?? Self.defaultFontFamilyDescriptors)
47
        showDownloadableFonts = false
48
        searchEnabled = false
49
    }
50

51
    required init?(coder: NSCoder) {
52
        fatalError("init(coder:) has not been implemented")
53
    }
54

55
}