【发布时间】:2019-08-06 15:06:21
【问题描述】:
我试图给我的 customView 投下阴影,但它没有显示。这个 customView 使用window?.addSubview(customView) 添加到窗口中。
目前的实施情况:
//CustomView setup
lazy var customView: UIView = {
let v = UIView()
v.translatesAutoresizingMaskIntoConstraints = false
v.layer.cornerRadius = 8
v.layer.shadowColor = UIColor.darkGray.cgColor
v.layer.shadowOffset = CGSize(width: 0, height: 10)
v.layer.shadowOpacity = 10.5
v.layer.shadowRadius = 15.0
v.layer.masksToBounds = true
return v
}()
//Adding view to window
window?.addSubview(customView)
NSLayoutConstraint.activate([
customView.leadingAnchor.constraint(equalTo: window!.leadingAnchor),
customView.trailingAnchor.constraint(equalTo: window!.trailingAnchor),
customView.heightAnchor.constraint(equalTo: window!.heightAnchor, multiplier: 1),
customView.topAnchor.constraint(equalTo: window!.safeAreaLayoutGuide.bottomAnchor, constant: -100)
])
【问题讨论】:
标签: swift