ios - 如何将自定义 XIB View 的位置和大小设置到主视图 Controller 中？

Question

我使用 xib 制作了自定义 View 类并从 XIB 加载此 UIView 类。它显示了这个 xib，但没有设置 ViewController.swift 中 UIView 的高度和宽度。

自定义 View .swift

class CustomView: UIView {

    @IBOutlet weak var contentView: UIView!

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

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

    func setupView() {
        Bundle.main.loadNibNamed("CustomView", owner: self, options: nil)
        self.addSubview(contentView)
    }

}

ViewController.Swift

Class ViewController: UIViewController {
        @IBOutlet weak var view1: UIView!

        override func viewDidLoad() {
            super.viewDidLoad()

            let customView = CustomView()
            customView.frame = view1.frame
            view1.addSubview(customView)
        }
    }

Answer 1

我会在自定义 View 的初始化中采用一些不同的方法。这是代码:

自定义 View :

class CustomView: UIView {

    @IBOutlet weak var contentView: UIView!

    class func instanceFromNibWithFrame(_ frame: CGRect) -> UIView {
        guard let view = UINib(nibName: "CustomView", bundle: nil).instantiate(withOwner: nil, options: nil)[0] as ?UIView else {
            fatalError("CustomView can't be init")
        }
    view.frame = frame
    return view
    }
}

View Controller :

class ViewController: UIViewController {
    @IBOutlet weak var view1: UIView!

    override func viewDidLoad() {
        super.viewDidLoad()

        let customView = CustomView.instanceFromNibWithFrame(view1.bounds)
        view1.addSubview(customView)
    }
}