An example of cropping images cross-platform on Titanium.

cropping-manager.js

/**
 * Crops a given image URL to an optional aspect ratop (square by default).
 * 
 * Example:
 * 
 *     const image = await ImageCroppingManager.crop(myImageURL);
 *
 */
export default class ImageCroppingManager {

    /**
     * Performs the image cropping.
     * @param {String|Ti.Blob|Ti.File} imageURL The image URL to use. 
     * @param {Object|Number} aspectRatio The aspect ratio to use (defaults to square)
     */
    static async crop(imageURL, aspectRatio = { x: 1, y: 1 }) {
        return new Promise((resolve, reject) => {
            if (OS_IOS) {
                const ImageCrop = require('ti.imagecrop');
                ImageCrop.addEventListener('done', event => {
                    if (event.cancel) {
                        reject();
                        return;
                    }
                    resolve(evemt.image);
                });
                ImageCrop.showCropDialog({ image, aspectRatio, });
            } else {
                // TODO: Implement on Android
            }
        });
    }
}