如何在UIButton内调整图像的大小？

Question

我想在UIButtons内调整图像的大小，但是图像不会调整我尝试的大小。目前图像看起来像this。为什么我无法在images中调整buttons的大小？

private func setupButtons() {
    planButton.backgroundColor = UIColor(red: 44/255, green: 62/255, blue: 80/255, alpha: 1.0)
    planButton.setImage(UIImage(named: "Plan"), for: .normal)
    planButton.alignTextBelow(spacing: 10)

    documentButton.backgroundColor = UIColor(red: 44/255, green: 62/255, blue: 80/255, alpha: 1.0)
    documentButton.setImage(UIImage(named: "folder"), for: .normal)
    documentButton.alignTextBelow(spacing: 10)

    documentationButton.backgroundColor = UIColor(red: 44/255, green: 62/255, blue: 80/255, alpha: 1.0)
    documentationButton.setImage(UIImage(named: "list"), for: .normal)
    documentationButton.alignTextBelow(spacing: 10)

    visitListButton.backgroundColor = UIColor(red: 44/255, green: 62/255, blue: 80/255, alpha: 1.0)
    visitListButton.setImage(UIImage(named: "people"), for: .normal)
    visitListButton.alignTextBelow(spacing: 10)

    plancorrectionButton.backgroundColor = UIColor(red: 44/255, green: 62/255, blue: 80/255, alpha: 1.0)
    plancorrectionButton.setImage(UIImage(named: "plancorrection"), for: .normal)
    plancorrectionButton.alignTextBelow(spacing: 10)

    constructDiaryButton.backgroundColor = UIColor(red: 44/255, green: 62/255, blue: 80/255, alpha: 1.0)
    constructDiaryButton.setImage(UIImage(named: "text"), for: .normal)
    constructDiaryButton.alignTextBelow(spacing: 10)

---

我添加了扩展名，以使标题正确对准图像下方。

extension UIButton{

func alignTextBelow(spacing: CGFloat = 10.0)
{
    if let image = self.imageView?.image
    {
        self.tintColor = .white
        let imageSize: CGSize = image.size
        self.titleEdgeInsets = UIEdgeInsets(top: spacing, left: -imageSize.width, bottom: -(imageSize.height), right: 0.0)
        let labelString = NSString(string: self.titleLabel!.text!)
        let titleSize = labelString.size(withAttributes: [NSAttributedString.Key.font: self.titleLabel!.font])
        self.imageEdgeInsets = UIEdgeInsets(top: -(titleSize.height + spacing), left: 0.0, bottom: 0.0, right: -titleSize.width)
    }
}

}

我尝试使用imageEdgeInsets，但是我没有想出可行的解决方案。这些图像不会改变我所做的任何事情。理想情况下，图像应全部相同大小。