ios - 如何在 swift UIView 类中设置新的 y 位置 ImageView

Question

import UIKit

class SalamView: UIView {

    @IBOutlet var salamView: UIView!

    @IBOutlet weak var salamLogoIMG: UIImageView!

    var salamLogoImgOrigY: CGFloat!
    var salamLogoImgFromToY: CGFloat!

    override init(frame: CGRect) {
        super.init(frame: frame)
        initializeViews()
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        initializeViews()
    }

    private func initializeViews(){
        Bundle.main.loadNibNamed("SalamView", owner: self)
        salamView.clipsToBounds = true
        salamView.setHeight(height: screenSize.height - statusBarHeight)
        salamView.setWidth(width: screenSize.width)
        addSubview(salamView)

        salamLogoImgOrigY = salamLogoIMG.frame.origin.y
        salamLogoImgFromToY = -(salamLogoIMG.frame.size.height + salamLogoImgOrigY)

       salamLogoIMG.frame = CGRect(x: salamLogoIMG.frame.origin.x,
 y: salamLogoImgFromToY,
 width: salamLogoIMG.frame.size.width,
 height: salamLogoIMG.frame.size.height)
    }

}

我需要将 salamLogoIMG 的 y 位置更改为 salamLogoImgFromToY，如果在 btn 操作中运行新的位置行代码它的工作，但我需要在第一次设置，请帮助我

Answer 1

还有问题

salamLogoImgFromToY = -(salamLogoIMG.frame.size.height + salamLogoImgOrigY) salamLogoImgFromToY 从不 (-) 减