获取 iOS 8 上的键盘大小不适用于外部键盘
Get keyboard size on iOS 8 not working with external keyboard
现在正在查看几个 SO post,但 none 似乎对我有帮助。只想设置一个 UITableView
s 底部约束,以便键盘永远不会位于 tableview 的顶部。 iOS 8.用普通软键盘可以用,但在模拟器中去掉软键盘或使用真硬件键盘时,还是认为有软键盘。
代码:
var currentKeyboardHeight:CGFloat = 0.0
override public func viewDidLoad() {
super.viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillShow:", name: UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillHide:", name: UIKeyboardWillHideNotification, object: nil)
}
deinit {
NSNotificationCenter.defaultCenter().removeObserver(self)
}
func keyboardWillShow(notification: NSNotification) {
if let userInfo = notification.userInfo {
var keyboardRect = userInfo[UIKeyboardFrameEndUserInfoKey]!.CGRectValue()
let windowRect = view.window!.convertRect(keyboardRect, fromWindow:nil)
let viewRect = view.convertRect(windowRect, fromView:nil)
let deltaHeight = viewRect.size.height - currentKeyboardHeight
currentKeyboardHeight = viewRect.size.height
tableViewBottomConstraint.constant = currentKeyboardHeight
UIView.animateWithDuration(0.25, animations: { () -> Void in
self.view.layoutIfNeeded()
})
println("show keyboard: \(currentKeyboardHeight)")
}
}
func keyboardWillHide(notification: NSNotification) {
if let userInfo = notification.userInfo {
var keyboardRect = userInfo[UIKeyboardFrameEndUserInfoKey]!.CGRectValue()
keyboardRect = self.view.convertRect(keyboardRect, fromView: nil)
let deltaHeight = keyboardRect.size.height - currentKeyboardHeight
currentKeyboardHeight = 0
tableViewBottomConstraint.constant = currentKeyboardHeight
UIView.animateWithDuration(0.25, animations: { () -> Void in
self.view.layoutIfNeeded()
})
println("hideKeyboard \(currentKeyboardHeight)")
}
}
在最后一个 tableview 行中选择 uitextview
时,仅打印:
show keyboard: 260.0
这是错误的。如果然后你打开软键盘(cmd+shift+k):
show keyboard: 260.0
show keyboard: 297.0
show keyboard: 297.0
这是正确的。然后将其关闭 (cmd+shift+k):
hideKeyboard 0.0
show keyboard: 260.0
hideKeyboard 0.0
哪个是正确的
更新 1:
根据对此答案的评论 (),当我使用 accessoryView
时,UIKeyboardWillShowNotification
将始终触发。
func setupKeyboardButtons()
{
let numberToolbar = UIToolbar(frame: CGRectMake(0,0,320,50))
numberToolbar.barStyle = UIBarStyle.Default
let button1 = UIBarButtonItem(title: CANCEL_TEXT, style: UIBarButtonItemStyle.Plain, target: self, action: "keyboardCancelButtonTapped:")
let button2 = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FlexibleSpace, target: nil, action: nil)
let button3 = UIBarButtonItem(title: SAVE_TEXT, style: UIBarButtonItemStyle.Plain, target: self, action: "keyboardDoneButtonTapped:")
button1.tintColor = UIColor.darkGrayColor()
numberToolbar.items = [button1, button2, button3]
numberToolbar.sizeToFit()
commentTextView.inputAccessoryView = numberToolbar
}
您可以检测是否连接了外部键盘,并通过执行类似操作将键盘高度设置为 0。
Objective-C版本:
CGRect finalKeyboardFrame = [[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];
finalKeyboardFrame = [self convertRect:finalKeyboardFrame fromView:self.window];
NSLog(@"origin.y: %f", finalKeyboardFrame.origin.y);
根据是否连接外部键盘正确显示 y 坐标:
origin.y: 258.000000 (not connected)
origin.y: 474.000000 (connected)
现在正在查看几个 SO post,但 none 似乎对我有帮助。只想设置一个 UITableView
s 底部约束,以便键盘永远不会位于 tableview 的顶部。 iOS 8.用普通软键盘可以用,但在模拟器中去掉软键盘或使用真硬件键盘时,还是认为有软键盘。
代码:
var currentKeyboardHeight:CGFloat = 0.0
override public func viewDidLoad() {
super.viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillShow:", name: UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillHide:", name: UIKeyboardWillHideNotification, object: nil)
}
deinit {
NSNotificationCenter.defaultCenter().removeObserver(self)
}
func keyboardWillShow(notification: NSNotification) {
if let userInfo = notification.userInfo {
var keyboardRect = userInfo[UIKeyboardFrameEndUserInfoKey]!.CGRectValue()
let windowRect = view.window!.convertRect(keyboardRect, fromWindow:nil)
let viewRect = view.convertRect(windowRect, fromView:nil)
let deltaHeight = viewRect.size.height - currentKeyboardHeight
currentKeyboardHeight = viewRect.size.height
tableViewBottomConstraint.constant = currentKeyboardHeight
UIView.animateWithDuration(0.25, animations: { () -> Void in
self.view.layoutIfNeeded()
})
println("show keyboard: \(currentKeyboardHeight)")
}
}
func keyboardWillHide(notification: NSNotification) {
if let userInfo = notification.userInfo {
var keyboardRect = userInfo[UIKeyboardFrameEndUserInfoKey]!.CGRectValue()
keyboardRect = self.view.convertRect(keyboardRect, fromView: nil)
let deltaHeight = keyboardRect.size.height - currentKeyboardHeight
currentKeyboardHeight = 0
tableViewBottomConstraint.constant = currentKeyboardHeight
UIView.animateWithDuration(0.25, animations: { () -> Void in
self.view.layoutIfNeeded()
})
println("hideKeyboard \(currentKeyboardHeight)")
}
}
在最后一个 tableview 行中选择 uitextview
时,仅打印:
show keyboard: 260.0
这是错误的。如果然后你打开软键盘(cmd+shift+k):
show keyboard: 260.0
show keyboard: 297.0
show keyboard: 297.0
这是正确的。然后将其关闭 (cmd+shift+k):
hideKeyboard 0.0
show keyboard: 260.0
hideKeyboard 0.0
哪个是正确的
更新 1:
根据对此答案的评论 (),当我使用 accessoryView
时,UIKeyboardWillShowNotification
将始终触发。
func setupKeyboardButtons()
{
let numberToolbar = UIToolbar(frame: CGRectMake(0,0,320,50))
numberToolbar.barStyle = UIBarStyle.Default
let button1 = UIBarButtonItem(title: CANCEL_TEXT, style: UIBarButtonItemStyle.Plain, target: self, action: "keyboardCancelButtonTapped:")
let button2 = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FlexibleSpace, target: nil, action: nil)
let button3 = UIBarButtonItem(title: SAVE_TEXT, style: UIBarButtonItemStyle.Plain, target: self, action: "keyboardDoneButtonTapped:")
button1.tintColor = UIColor.darkGrayColor()
numberToolbar.items = [button1, button2, button3]
numberToolbar.sizeToFit()
commentTextView.inputAccessoryView = numberToolbar
}
您可以检测是否连接了外部键盘,并通过执行类似操作将键盘高度设置为 0。
Objective-C版本:
CGRect finalKeyboardFrame = [[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];
finalKeyboardFrame = [self convertRect:finalKeyboardFrame fromView:self.window];
NSLog(@"origin.y: %f", finalKeyboardFrame.origin.y);
根据是否连接外部键盘正确显示 y 坐标:
origin.y: 258.000000 (not connected)
origin.y: 474.000000 (connected)