Swift如何在stackview中調整圖像大小

Question

我在堆棧視圖中有2個項目，一個是圖像，另一個是標簽。 我希望圖像根據其幀大小調整大小而不是堆棧的大小我該怎么改變它。

//stack code
lazy var releaseInfoStack:UIStackView = {
        let v = UIStackView()
        v.translatesAutoresizingMaskIntoConstraints = false
        v.spacing = 4
        v.alignment = .center
        v.axis = .horizontal
        return v
    }()

//my image
lazy var smallRealeaseImageIcon:UIImageView = {
        let v = UIImageView(frame:CGRect(x: 0, y: 0, width: 17, height: 17))
        v.contentMode = .scaleAspectFit
        v.image = UIImage(named: "link")
        return v
    }()

//this is the current image below but i want the link icon to be smaller

Answer 1

您可以添加高度和寬度的約束：

let imageViewWidthConstraint = NSLayoutConstraint(item: smallRealeaseImageIcon, attribute: .width, relatedBy: .equal, toItem: nil, attribute: .notAnAttribute, multiplier: 1, constant: 20)
let imageViewHeightConstraint = NSLayoutConstraint(item: smallRealeaseImageIcon, attribute: .height, relatedBy: .equal, toItem: nil, attribute: .notAnAttribute, multiplier: 1, constant: 20)
smallRealeaseImageIcon.addConstraints([imageViewWidthConstraint, imageViewHeightConstraint])

只需確保按比例設置stackview的分布：

releaseInfoStack.distribution = .fillProportionally