Display activity indicator inside UIButton

Question

I would like to change the content of a UIButton to an ActivityIndicator after it is pressed.

I know buttons have an imageView and a titleLabel, but I don\'t know how to

Answer 1

Excellent @Steve,

Can use below implementation instead of line,

var activityIndicator: UIActivityIndicatorView!

use this, so that if we configure the activity indicator before calling showLoading(), the app wont crash.

private var _activityIndicator:UIActivityIndicatorView! = nil
var activityIndicator: UIActivityIndicatorView{
    set{
        _activityIndicator = newValue

    }
    get{
        if _activityIndicator == nil{
            _activityIndicator = createActivityIndicator()
        }
        return _activityIndicator
    }
}