imageView
The button’s image view.
Declaration
var imageView: UIImageView? { get }Discussion
Although this property is read-only, its own properties are read/write. Use these properties to configure the appearance and behavior of the button’s view. For example:
UIButton *button = [UIButton buttonWithType: UIButtonTypeSystem];
button.imageView.exclusiveTouch = YES;The imageView property returns a value even if the button has not been displayed yet. The value of the property is nil for system buttons.