ios 为什么我不能在 Swift 中更改视图的帧大小？
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Why can't I change the view's frame size in Swift?
提问by kalafun
So this is the weirdest thing I came across ever.
所以这是我遇到的最奇怪的事情。
I add a simple UIViewon top of an UIViewon an UIViewController. I change the size to 200 x 200 and then I want to change the UIView's size by placing this line of code inside the viewDidLoadmethod:
我添加了一个简单UIView的的顶部UIView上UIViewController。我将大小更改为 200 x 200，然后我想UIView通过在viewDidLoad方法中放置这行代码来更改的大小：
self.gameBackgroundView.frame.size.height = 10
which seems perfectly normal in Swift. Though, nothing happens. I can change the color, corner radius etc...
这在 Swift 中似乎很正常。虽然，什么也没有发生。我可以更改颜色、圆角半径等...
EDIT:
编辑：
I have also deleted all constraints from that view and it still does not work.
我还从该视图中删除了所有约束，但它仍然不起作用。
回答by kalafun
Ok, So I found a solution here on stack ..
好的，所以我在堆栈上找到了一个解决方案..
Change frame programmatically with auto layout
The correct answer, that works is, that:
有效的正确答案是：
- I need to create an IBOutlet of my heightConstraint
- Change the value of that constraint accordingly
- 我需要创建一个高度约束的 IBOutlet
- 相应地更改该约束的值
Thank you all!
谢谢你们！
回答by Victor Sigler
It is because of Auto Layout, however, you could do it after Auto Layout is done its work or change constraints of it. Set it your framein your viewDidAppear()instead. It should work.
这是因为自动布局，但是，您可以在自动布局完成其工作或更改其约束后执行此操作。将其设置为您frame的viewDidAppear()。它应该工作。
I hope this helps you.
我希望这可以帮助你。
回答by Carlos Norena
Try this code, it will work on any device
试试这个代码，它可以在任何设备上运行
let BackImage = UIImage(named: "[email protected]")!
var imageView: UIImageView!
override func loadView() {
super.loadView()
self.imageView = UIImageView(frame: CGRectZero)
self.imageView.contentMode = .ScaleAspectFill
self.imageView.image = BackImage
self.view.insertSubview(imageView, atIndex: 0)
}
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
self.imageView.frame = self.view.bounds
}
