我使用 xibs 并以编程方式完成大部分工作。不接触 Storyboard。我只想使用 Storyboard进行导航。
我的问题是，在方向 View 高度和宽度保持不变之后。应用运行后如何在纵向和方向模式下获取宽度和高度。
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, HeaderStyle1Delegate, FieldStyle1Delegate, ButtonStyle1Delegate {
var tableStyle = UITableView()
var header: HeaderStyle1!
override func viewDidLoad() {
super.viewDidLoad()
createView() // call function for create header, table and regis xib/UINib
}
func createView() {
//Create Header
header = HeaderStyle1(frame: CGRect(x: 0, y: 0, width: self.view.frame.size.width, height: 80))
header.delegate = self
self.view.addSubview(header)
//Create TableView
tableStyle.frame = CGRect(x: 0, y: 80, width: self.view.frame.size.width, height: self.view.frame.size.height - 80)
tableStyle.delegate = self
tableStyle.dataSource = self
tableStyle.backgroundColor = UIColor(red: 245.0/255.0, green:
248.0/255.0, blue: 252.0/255.0, alpha: 1.0)
tableStyle.separatorColor = UIColor.clear
tableStyle.allowsSelection = false
tableStyle.isScrollEnabled = true
......
...
..
}
截图
我的 View Controller 。 (正如我提到的，它是空的)
最佳答案
在这些情况下最好使用约束而不是重置框架
header.translatesAutoresizingMaskIntoConstraints = false
if #available(iOS 11, *) {
let guide = view.safeAreaLayoutGuide
header.leadingAnchor.constraint(equalTo: guide.leadingAnchor).isActive = true
header.trailingAnchor.constraint(equalTo: guide.trailingAnchor).isActive = true
header.topAnchor.constraint(equalTo: guide.topAnchor).isActive = true
} else {
header.leadingAnchor.constraint(equalTo: self.view.leadingAnchor).isActive = true
header.trailingAnchor.constraint(equalTo: self.view.trailingAnchor).isActive = true
header.topAnchor.constraint(equalTo: topLayoutGuide.bottomAnchor).isActive = true
}
header.heightAnchor.constraint(equalToConstant: 80.0).isActive = true
关于ios - View 的宽度和高度在定向后不会改变，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/48754353/