防止在presentViewController上隐藏键盘(显示弹出窗口)

Question

有一个UITextView视图.UITextView是键盘唯一可能的firstResponder.我们称之为"BackView".

另一个视图是PopUp(具有透明背景的全屏视图,其淡化底层视图).我们称之为"PopUp".

PopUp工作正常,除非键盘在屏幕上.呈现PopUp强制键盘被隐藏,当PopUp被解除时,键盘再次显示.由于PopUp没有覆盖整个BackView,因此效果不佳.

在显示PopUp时,有没有办法在BackView上保持键盘？(弹出窗口无需使用键盘).

PopUp包含:

• 全屏幕视图与背景设置为黑色与alpha(淡入底层视图)
• 几个图像,标签和关闭按钮.

PopUp显示为:

[self setModalPresentationStyle:UIModalPresentationCurrentContext];
[self presentViewController:vc animated:YES completion:nil];

找到解决方案

将PopUp视图添加为当前窗口的子视图

Answer 1

展示：

if let popupVC = storyboard.instantiateViewControllerWithIdentifier("PopupVC") as? PopupVC
    {
        var frame = UIScreen.mainScreen().bounds
        frame.origin.y = frame.size.height
        overlayWindow = UIWindow(frame: frame)

        popupVC.overlayWindow = overlayWindow
        overlayWindow.windowLevel = UIWindowLevelAlert
        overlayWindow.rootViewController = popupVC

        overlayWindow.makeKeyAndVisible()

        UIView.animateWithDuration(0.3, animations:
        {
            self.overlayWindow.frame.origin.y = 0
        })
    }

隐藏在 PopupVC 中

 if let window = overlayWindow
    {
        UIView.animateWithDuration(0.3, animations: {
            window.frame.origin.y = window.frame.height
        }, completion: { (finished) -> Void in
            self.overlayWindow = nil
        })
    }