jot 0.1.5

jot 0.1.5

LangLanguage Obj-CObjective C
License MIT
ReleasedLast Release Aug 2015

Maintained by Devin Foley, Laura Skelton.




Pod Tries14
Test Targets89
powered by Segment


Pull Requests3


LOCLines of Code 1,205

jot 0.1.5

  • By
  • Laura Skelton, Max Meyers and Devin Foley

jot Logo

jot is an easy way to add touch-controlled drawings and text to images in your iOS app.


What's jot for?

Annotating Images

jot is the easiest way to add annotations to images with a touch interface. You can draw arrows or circle important things, as well as add resizable, rotatable text captions, and easily save the notes on top of a image using drawOnImage:.

Whiteboard or Drawing Apps

jot is perfect for quick sketches and notes in your whiteboard or drawing app. It's easy to change the drawing color or stroke width, and when you're done, you can call renderImageOnColor: to save the sketch.


jot is a great solution if you need to collect user signatures through a touch interface. Set the drawingColor to black, set the state to JotViewStateDrawing, and save the signature when the user is done by calling renderImageOnColor:.


Example Project

To run the example project, clone the repo, and run pod install from the Example directory.


Add an instance of JotViewController as a child of your view controller. Adjust the size and layout of JotViewController's view however you'd like.

#import "ExampleViewController.h"
#import <jot.h>

@interface ExampleViewController ()
@property (nonatomic, strong) JotViewController *jotViewController;

@implementation ExampleViewController

- (void)viewDidLoad
    [super viewDidLoad];
    _jotViewController = [JotViewController new];
    self.jotViewController.delegate = self;

    [self addChildViewController:self.jotViewController];
    [self.view addSubview:self.jotViewController.view];
    [self.jotViewController didMoveToParentViewController:self];
    self.jotViewController.view.frame = self.view.frame;

Switch between drawing, text manipulation, and text edit mode.

- (void)switchToDrawMode
    self.jotViewController.state = JotViewStateDrawing;

- (void)switchToTextMode
    self.jotViewController.state = JotViewStateText;

- (void)switchToTextEditMode
    self.jotViewController.state = JotViewStateEditingText;

Clear the drawing.

// Clears text and drawing
[self.jotViewController clearAll];

// Clears only text
[self.jotViewController clearText];

// Clears only drawing
[self.jotViewController clearDrawing];

Image Output

Draw on a background image.

- (UIImage *)imageWithDrawing
    UIImage *myImage = self.imageView.image;
    return [self.jotViewController drawOnImage:myImage];

Draw on a color.

- (UIImage *)imageOnColorWithDrawing
    UIColor *backgroundColor = self.view.backgroundColor;
    return [self.jotViewController renderImageOnColor:backgroundColor];

Draw on a transparent background.

- (UIImage *)imageOnColorWithDrawing
    UIColor *backgroundColor = self.view.backgroundColor;
    return [self.jotViewController renderImage];

Basic Configuration

Text Settings

Change the font.

self.jotViewController.font = [UIFont boldSystemFontOfSize:64.f];

Change the font size.

self.jotViewController.fontSize = 64.f;

Change the text color.

self.jotViewController.textColor = [UIColor redColor];

Set the initial text string.

self.jotViewController.textString = @"Hello World";

Drawing Settings

Change the drawing stroke color.

self.jotViewController.drawingColor = [UIColor magentaColor];

Change the drawing stroke width.

self.jotViewController.drawingStrokeWidth = 10.f;

Make the drawing stroke a constant width, instead of the default dynamically variable width.

self.jotViewController.drawingConstantStrokeWidth = YES;

Advanced Configuration

Text Settings

Set the text to wrap to the width of the view.

self.jotViewController.fitOriginalFontSizeToViewWidth = YES;

Set the text alignment (only applies if text is set to wrap).

self.jotViewController.textAlignment = NSTextAlignmentRight;

Set the text insets (only applies if text is set to wrap).

self.jotViewController.initialTextInsets = UIEdgeInsetsMake(10.f, 10.f, 10.f, 10.f);

Set the text editing insets.

self.jotViewController.textEditingInsets = UIEdgeInsetsMake(10.f, 10.f, 10.f, 10.f);

Set the text edit view to clip text to the text editing insets (instead of fading out with a gradient).

self.jotViewController.clipBoundsToEditingInsets = YES;



jot is available under the MIT license. See the LICENSE file for more info.

Copyright 2015 IFTTT Inc.