ios - 作为 subview 添加到应用程序窗口的 UIView 在设备旋转时不旋转

Question

我创建了 UIView 的扩展并创建了一个 ActivityIndi​​catorView 并将其作为 subview 添加到 UIApplication Window。现在，当设备旋转时，UIViewController 也会旋转，而不是这个 ActivityIndi​​catorView。

internal extension UIView{

func showActivityViewWithText(text: String?) -> UIView{

    let window = UIApplication.sharedApplication().delegate?.window!!
    let baseLineView = window!.viewForBaselineLayout()

    let locView = UIView(frame:window!.frame)
    locView.backgroundColor = UIColor.clearColor()
    locView.center = window!.center

    baseLineView.addSubview(locView)
    baseLineView.bringSubviewToFront(locView)

    let overlay = UIView(frame: locView.frame)
    overlay.backgroundColor = UIColor.blackColor()
    overlay.alpha = 0.35

    locView.addSubview(overlay)
    locView.bringSubviewToFront(overlay)

    let hud = UIActivityIndicatorView(activityIndicatorStyle: .WhiteLarge)
    hud.hidesWhenStopped = true
    hud.center = CGPoint(x: locView.frame.size.width/2,
                         y: locView.frame.size.height/2)

    hud.transform = CGAffineTransformMakeScale(1, 1)
    hud.color = UIColor.redColor()
    hud.startAnimating()

    locView.addSubview(hud)
    locView.bringSubviewToFront(hud)
}

Answer 1

可能问题出在错过自动调整大小掩码？尝试添加:

hud.autoresizingMask = [ .flexibleTopMargin, .flexibleBottomMargin, .flexibleLeftMargin, .flexibleRightMargin ]

我想，由于您的 hud 是 locView 的 subview ，autoresizingMask 也是 locView 所必需的。