ImageAsCropped-Example.js

var win = Ti.UI.createWindow();

var outterView = Ti.UI.createView({
	width: 300,
	height: 300,
	backgroundColor: "red",
	top: 40
});

var innerView = Ti.UI.createView({
	width: 200,
	height: 200,
	backgroundColor: "yellow"
});

var trigger = Ti.UI.createButton({
	top: 10,
	title: "Crop to 200x200 (yellow part)"
});

var resultImageView = Ti.UI.createImageView({bottom: 40});

trigger.addEventListener("click", function() {
	var image = outterView.toImage();
	var cropped = image.imageAsCropped({
		width: 200,
		height: 200,
		x: 150,
		y: 150
	});
	resultImageView.setImage(cropped);
});

outterView.add(innerView);
win.add(outterView);
win.add(resultImageView);
win.add(trigger);
win.open();