添加约束时使translatesAutoresizingMaskinToConstraints为false

我想你可以加上这句话 translatesAutoresizingMaskIntoConstraints 在你看来,子类。例如,您通常使用 UITextField 或者说 UIView ,当然有这样的基类,比如:

import UIKit

/// Another Customized/Subclassed UIButton.
class BaseButton: UIButton {

    /// override init
    override init(frame: CGRect) {
        super.init(frame: frame)

            self.translatesAutoresizingMaskIntoConstraints = false
       }
    }

    /// override coder
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

或者更好,我可以建议,下面这个吗?我将snapkit用于所有生产级项目。

https://github.com/SnapKit/SnapKit

我希望这有帮助!

您可以扩展 UIView 为约束初始化,以便它应用于 UIControls 习俗 UIViews .

extension UIView {
    func anchor(_ anotherView: UIView) {
        anotherView.translatesAutoresizingMaskIntoConstraints = false
        self.addSubview(anotherView)
        anotherView.leftAnchor.constraint(equalTo: self.leftAnchor).isActive = true
        anotherView.topAnchor.constraint(equalTo: self.topAnchor).isActive = true
        anotherView.rightAnchor.constraint(equalTo: self.rightAnchor).isActive = true
        anotherView.bottomAnchor.constraint(equalTo: self.bottomAnchor).isActive = true
    }
}

例子:

func setupView() {
    self.view.anchor(self.someImageView)
}