给UIButton设置圆角和阴影，关键点是shadowOpacity不能为0
private lazy var <#name#>: UIButton = {
let button = UIButton(type: .custom)
button.layer.cornerRadius = 20
button.layer.shadowColor = UIColor.black.cgColor
button.layer.shadowRadius = 2
button.layer.shadowOffset = CGSize(width: 2, height: 2)
button.layer.shadowOpacity = 0.1
return button
}()
无论是UICollectionView还是UITableView要想contentInset表现的如预期那样考虑一下设置
if #available(iOS 11.0, *) {
collectionView.contentInsetAdjustmentBehavior = .never
} else {
automaticallyAdjustsScrollViewInsets = false
}
记一次UITableView 样式为group 设置了sectionHeader/sectionFooder卡顿 解决方法 需要设置以下属性
tableView.estimatedSectionHeaderHeight = 0
tableView.estimatedSectionFooterHeight = 0
navigationbar设置titleview 在iOS11以下尺寸正常展示
class <#name#>: UIView {
let contentSize: CGSize
override var intrinsicContentSize: CGSize {
if #available(iOS 11, *) {
return UIView.layoutFittingExpandedSize
} else {
return contentSize
}
}
override init(frame: CGRect) {
contentSize = frame.size
super.init(frame: frame)
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
