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起伏的全屏退出过渡

viewcontroller animation swift ios

Minebomber · 技术社区 · 8 年前

我有一个自定义的视图控制器,可以通过一个按钮全屏显示。它通常是视图(嵌入)的子视图。我在embed的全屏输入是:

private func enterFullScreenFromEmbed() {

    self.proxyView = UIView(frame: self.view.frame)
    self.proxyView?.isHidden = true
    self.proxyView?.autoresizingMask = self.view.autoresizingMask
    self.view.superview?.addSubview(self.proxyView!)

    // Now set the frame to the screen frame
    let frame = self.view.window?.convert(self.view.frame, from: self.proxyView?.superview)
    self.view.window?.addSubview(self.view)
    self.view.frame = frame!

    self.isFullscreen = true

    UIView.animate(withDuration: 0.25) { 
        self.view.frame = self.view.window!.bounds
        self.view.layoutIfNeeded()
        self.setNeedsStatusBarAppearanceUpdate()
    }
}

并退出全屏:

private func exitFullScreenToEmbed() {

    let frame = self.view.window?.convert(self.view.frame, to: self.proxyView?.superview)
    self.proxyView?.superview?.addSubview(self.view)
    self.view.frame = frame!

    self.isFullscreen = false

    UIView.animate(withDuration: 0.25, animations: {

        self.view.frame = self.proxyView!.frame

        self.view.layoutIfNeeded()
        self.setNeedsStatusBarAppearanceUpdate()
    }) { (_) in
        self.proxyView?.removeFromSuperview()
        self.proxyView = nil
    }
}

这很好,除了我在进入全屏动画中隐藏状态栏,并在退出全屏动画中显示它。这会导致顶视图跳回原位,而不设置动画。

isFullscreen 变量隐藏状态栏。

override var prefersStatusBarHidden: Bool {
    return isFullscreen
}

override var preferredStatusBarUpdateAnimation: UIStatusBarAnimation {
    return .slide
}

Horizonal

Vertical

请注意横向视图的顶部和底部(在横向视图中更容易看到)。在顶部,播放器框架立即设置为旧位置,这会将所有内容向下移动20px(或状态栏的任何高度)

它与隐藏的状态栏有关。有人有办法吗?

1 回复 | 直到 8 年前

Minebomber 8 年前

我想出来了。这是一种黑客行为,没有经过充分测试,但这是我提出的解决方案。

首先,获取一个变量以保存状态栏高度(不是0)。

var statusBarHeight: CGFloat = UIApplication.shared.statusBarFrame.height != 0 ? UIApplication.shared.statusBarFrame.height : 20.0

然后,设置状态栏框架更改的通知。

NotificationCenter.default.addObserver(self, selector: #selector(SKPlayerViewController.updateLocalStatusBarFrameHeight), name: .UIApplicationDidChangeStatusBarFrame, object: nil)

现在,在该方法中,仅当高度不是0时才更新变量。我们保存了高度,因为状态栏可能不是20(如果在通话中等)。

@objc private func updateLocalStatusBarFrameHeight() {
        let height = UIApplication.shared.statusBarFrame.height
        if height > 0 {
            self.statusBarHeight = height
        }
    }

exitFullScreenToEmbed() 将计算的帧原点减去 statusBarHeight 仅当不是横向时(因为状态栏隐藏在横向中)。

private func exitFullScreenToEmbed() {

    var frame = self.view.window?.convert(self.view.frame, to: self.proxyView?.superview)
    self.proxyView?.superview?.addSubview(self.view)

    if !(UIApplication.shared.statusBarOrientation == .landscapeRight || UIApplication.shared.statusBarOrientation == .landscapeLeft) {
        frame?.origin.y -= self.statusBarHeight
    }

    self.view.frame = frame!

    self.isFullscreen = false

    UIView.animate(withDuration: 0.25, animations: {

        self.view.frame = self.proxyView!.frame

        self.view.layoutIfNeeded()
        self.setNeedsStatusBarAppearanceUpdate()
    }) { (_) in
        self.proxyView?.removeFromSuperview()
        self.proxyView = nil
    }
}