Trying to set a button with an image in tableView:editActionsForRowAt: - ios

Question

Working with Xcode 9.2, in a UITableView, I am setting a button with an image and no text when a cell is left swiped.
Here is the precise code I am using:
func tableView(_ tableView: UITableView,
editActionsForRowAt indexPath: IndexPath) -> [UITableViewRowAction]? {
let myButton = UITableViewRowAction(style: .normal, title: "") {
action, index in
print("myButton was tapped")
}
myButton.backgroundColor = UIColor(patternImage: UIImage(named: "myImage")!)
return [myButton]
}
It works but the image appears at the bottom of the cell.
How can I bring it to the center?
Just in case, here is the image I am using for testing (70x70 pixels):
And here is how it looks in the table view:

Answer 1

This is one of the way. You have to create image with UIGraphicsBeginImageContextWithOptions.
func swipeCellButtons() -> UIImage
{
let commonWid : CGFloat = 40
let commonHei : CGFloat = 70 // EACH ROW HEIGHT
var img: UIImage = UIImage(named: "pause") // TRY IMAGE COLOR WHITE
UIGraphicsBeginImageContextWithOptions(CGSize(width: commonWid, height: commonHei), false, UIScreen.main.scale)
let context = UIGraphicsGetCurrentContext()
context!.setFillColor(UIColor.clear.cgColor)
context!.fill(CGRect(x: 0, y: 0, width: commonWid, height: commonHei))
var img: UIImage = UIImage(named: "pause")!
img.draw(in: CGRect(x: 5, y: 15, width: 30, height: 30))
let newImage: UIImage = UIGraphicsGetImageFromCurrentImageContext()!
UIGraphicsEndImageContext()
return newImage
}
func tableView(_ tableView: UITableView,
editActionsForRowAt indexPath: IndexPath) -> [UITableViewRowAction]? {
let myButton = UITableViewRowAction(style: .normal, title: "") {
action, index in
print("myButton was tapped")
}
let patternImg = swipeCellButtons()
myButton.backgroundColor = UIColor(patternImage: patternImg)
return [myButton]
}