解決鍵盤彈起網(wǎng)頁(yè)自動(dòng)上移問(wèn)題，實(shí)現(xiàn)viewForZooming代理

class ViewController: UIScrollViewDelegate {

}

self.scrollview.delegate = self;

// 如果return nil會(huì)出現(xiàn)鍵盤背景透明問(wèn)題
extension ViewController { 
    func viewForZooming(in scrollView: UIScrollView) -> UIView? {
        return UIView()
    }
}

監(jiān)聽鍵盤事件

        NotificationCenter.default.rac_addObserver(forName: UIResponder.keyboardWillShowNotification.rawValue, object: nil).subscribeNext { [weak self] x in
            self?.keyboardWillChangeFrame(x! as Notification)
        }
        
        NotificationCenter.default.rac_addObserver(forName: UIResponder.keyboardWillHideNotification.rawValue, object: nil).subscribeNext { [weak self] x in
            self?.keyboardDidHide(x! as Notification)
        }

extension ViewController {
    
    /// 鍵盤彈出
    @objc func keyboardWillChangeFrame(_ notification: Notification) {
        let keyboardFrame = (notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue

    }
    
    /// 鍵盤收回
    @objc func keyboardDidHide(_ notification: Notification) {

}