An alternative implementation for setting the magnifying glass color. You need to add this class to the scene dock of your View Controller in interface builder and connect the IBOutlet to the UISearchBar instance. The color for the component can be set on the object in storyboard. The although this is more work than the other approach you have t…

UISearchBar_Magnifying_GlassColorChange_withSceneDock.swift

class UISearchBarMagnifyingGlass: NSObject {
	@IBOutlet weak var searchBar: UISearchBar! {
		didSet {
			if let _color = color, let _searchBar = searchBar {
				for i in _searchBar.subviews.first!.subviews {
					if let textField = i as? UITextField,
						let imageView = textField.leftView as? UIImageView,
						let image = imageView.image
					{
						let coloredImage = image.withRenderingMode(UIImageRenderingMode.alwaysTemplate)
						imageView.image = coloredImage
						imageView.tintColor = _color
					}
				}
			}
		}
	}
	@IBInspectable var color: UIColor?
}