Merge Two Image on to one Image programmatically in iphone

Question

Hello I am developing the application which requires to merge two Image , My image size are 320*240 by merging both Image I want the size to be 320 * 480 . How can i do this

Answer 1

This implementation works for variadic arguments, so you can pass an unlimited number of images to merge vertically:

public static func mergeVertically(images: UIImage...) -> UIImage? {
    let maxWidth = images.reduce(0.0) { max($0, $1.size.width) }
    let totalHeight = images.reduce(0.0) { $0 + $1.size.height }

    UIGraphicsBeginImageContextWithOptions(CGSize(width: maxWidth, height: totalHeight), false, 0.0)
    defer {
        UIGraphicsEndImageContext()
    }

    let _ = images.reduce(CGFloat(0.0)) {
        $1.draw(in: CGRect(origin: CGPoint(x: 0.0, y: $0), size: $1.size))
        return $0 + $1.size.height
    }

    return UIGraphicsGetImageFromCurrentImageContext()
}