当我改变设备的方向时，为什么框架中的值等于特定大小不做同样的工作？

Question

我有一段代码允许我在更改设备方向时更改 UIImageView 的大小。

我硬编码了这些值（高度 = 896 和宽度 = 414），它运行良好，但是当我想通过放置动态值（height = self.view.frame.size.height 和 width = self.view.frame.size.width 来实现动态大小时), 它不起作用...

然而，self.view.frame.size.height = 896 和 self.view.frame.size.width = 414 这很奇怪......我想我错过了什么。

override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
    super.viewWillTransition(to: size, with: coordinator)

    if UIDevice.current.orientation.isLandscape {
        print("Landscape")
        self.newImageView?.frame.size.height = 414
        self.newImageView?.frame.size.width = 896
        navBar?.frame = CGRect(x: 0, y: 0, width: 896, height: 100)
    } else {
        print("Portrait")
        self.newImageView?.frame.size.height = 896
        self.newImageView?.frame.size.width = 414
        navBar?.frame = CGRect(x: 0, y: 40, width: 414, height: 100)
    }
}

编辑（解决方案）：有关信息，我在我的代码中使用了这种方式，但票证中的解决方案更短更现代

 //Share bar
        let shareBar: UIBarButtonItem = UIBarButtonItem.init(barButtonSystemItem:.action, target: self, action: #selector(userDidTapShare))
        self.navigationItem.rightBarButtonItem = shareBar
        if UIDevice.current.orientation.isLandscape {
            let width =  max(self.view.frame.size.width, self.view.frame.size.height)
            let height = min(self.view.frame.size.width, self.view.frame.size.height)
            self.newImageView?.frame.size.height = height
            self.newImageView?.frame.size.width = width
            navBar = UINavigationBar(frame: CGRect(x: 0, y: UIApplication.shared.statusBarFrame.height, width: width, height: 100))
        } else {
            let width =  min(self.view.frame.size.width, self.view.frame.size.height)
            let height = max(self.view.frame.size.width, self.view.frame.size.height)
            self.newImageView?.frame.size.height = height
            self.newImageView?.frame.size.width = width
            navBar = UINavigationBar(frame: CGRect(x: 0, y: UIApplication.shared.statusBarFrame.height, width: width, height: 100))
        }
        view.addSubview(navBar!)

有什么想法吗？

Answer 1

在那个方法中放置一个断点，你会看到这个方法在视图改变方向之前被调用，这就是为什么你没有正确的高度和宽度，而是使用 size 参数中的值，这个应该可以。

但是同意评论，改用auto-layout，它会让你的生活更轻松

Answer 2

如果您想调整导航栏的大小

 self.navBar.autoresizingMask = (UIView.AutoresizingMask(rawValue: UIView.AutoresizingMask.RawValue(UInt8(UIView.AutoresizingMask.flexibleRightMargin.rawValue) | UInt8(UIView.AutoresizingMask.flexibleLeftMargin.rawValue) | UInt8(UIView.AutoresizingMask.flexibleBottomMargin.rawValue) | UInt8(UIView.AutoresizingMask.flexibleTopMargin.rawValue))))

将其放在 view.addSubview(navBar!)

之后

当我改变设备的方向时，为什么框架中的值等于特定大小不做同样的工作？

Why value in the frame than is equal to a specific size doesn't do the same job when I change the orientation of the device?

uiviewcontroller

uiview

uiimageview

ios

swift