// 监听键盘通知
NotificationCenter.
default.addObserver(self, selector: #selector(ComposeViewController.keyboardWillChangeFrame(note:)), name: NSNotification.Name.UIKeyboardWillChangeFrame,
object: nil)
//监听键盘的事件
func keyboardWillChangeFrame(note: Notification) {
print(note.userInfo ??
"")
// 1.获取动画执行的时间
let duration = note.userInfo?[UIKeyboardAnimationDurationUserInfoKey]
as!
TimeInterval
// 2.获取键盘最终 Y值
let endFrame = (note.userInfo?[UIKeyboardFrameEndUserInfoKey]
as!
NSValue).cgRectValue
let y =
endFrame.origin.y
//计算工具栏距离底部的间距
let margin = UIScreen.main.bounds.height -
y
print(margin)
// 更新约束,执行动画
toolBarBottom.snp.updateConstraints { (make)
in
make.left.equalTo(0)
make.right.equalTo(0)
make.height.equalTo(44)
make.bottom.equalTo(-
margin)
}
UIView.animate(withDuration: duration) {
self.view.layoutIfNeeded()
}
}
转载于:https://www.cnblogs.com/ningmengcao-ios/p/6066621.html
相关资源：Swift实现监听键盘通知及一些处理详解
