ios - 折叠键盘、工具栏

Question

如何检查键盘何时完全显示以及何时像这样折叠？也许我可以检查它的高度？

我暂时检查了 notification 中的 userInfo，但没有发现对解决我的问题有用。

Answer 1

只需订阅通知:

NotificationCenter.default.addObserver(self, selector: 
#selector(self.adjustForKeyboard), name: 
NSNotification.Name.UIKeyboardDidShow, object: nil)

NotificationCenter.default.addObserver(self, selector: 
#selector(self.adjustForKeyboard), name: 
NSNotification.Name.UIKeyboardDidHide, object: nil)

然后贴近下一个方法

func adjustForKeyboard(notification: NSNotification) {
    let userInfo = notification.userInfo!

    if  let keyboardScreenEndFrame = (userInfo[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
        let keyboardViewEndFrame = delegate.getView().convert(keyboardScreenEndFrame, from: delegate.getView().window)

        var customInset = UIEdgeInsets.zero            
        if notification.name == NSNotification.Name.UIKeyboardDidHide {
            customInset = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
        } else {
            customInset = UIEdgeInsets(top: 0, left: 0, bottom: keyboardViewEndFrame.height, right: 0)
        }

        scrollView.contentInset = customInset
        scrollView.scrollIndicatorInsets = customInset
    }
}

当你离开这个 VC 时不要忘记移除观察者

NotificationCenter.default.removeObserver(self)