要确保scrollView滚动超过KeyboardSpacer的高度,可以采取以下步骤:
以下是一个示例代码片段,展示了如何实现上述步骤:
import UIKit
class ViewController: UIViewController {
@IBOutlet weak var scrollView: UIScrollView!
@IBOutlet weak var contentView: UIView!
@IBOutlet weak var scrollViewBottomConstraint: NSLayoutConstraint!
override func viewDidLoad() {
super.viewDidLoad()
// 监听键盘弹出通知
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow(_:)), name: UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide(_:)), name: UIResponder.keyboardWillHideNotification, object: nil)
}
deinit {
// 移除键盘通知的监听
NotificationCenter.default.removeObserver(self)
}
@objc func keyboardWillShow(_ notification: Notification) {
// 获取键盘的高度和动画持续时间
guard let userInfo = notification.userInfo,
let keyboardFrame = userInfo[UIResponder.keyboardFrameEndUserInfoKey] as? CGRect,
let animationDuration = userInfo[UIResponder.keyboardAnimationDurationUserInfoKey] as? Double else {
return
}
// 调整scrollView的内容区域的底部约束,使其滚动超过KeyboardSpacer的高度
let keyboardHeight = keyboardFrame.height
scrollViewBottomConstraint.constant = keyboardHeight - view.safeAreaInsets.bottom
// 使用动画效果更新scrollView的布局
UIView.animate(withDuration: animationDuration) {
self.view.layoutIfNeeded()
}
}
@objc func keyboardWillHide(_ notification: Notification) {
// 恢复scrollView的内容区域的底部约束为0
scrollViewBottomConstraint.constant = 0
// 使用动画效果更新scrollView的布局
UIView.animate(withDuration: 0.3) {
self.view.layoutIfNeeded()
}
}
}
请注意,上述代码是一个示例,具体实现可能因你的应用架构和需求而有所不同。你需要根据自己的实际情况进行调整和修改。
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