我已将UIkeyboarddismissmode
设置为.Interactive
,我不知道如何调整UITextView
的大小,以便键盘不会覆盖内容。我还有一个UIToolbar
作为inputaccessory
。
这是我的代码。
@IBOutlet weak var textView: UITextView!
override func viewDidLoad() {
super.viewDidLoad()
self.addDoneButtonOnKeyboard()
self.textView.keyboardDismissMode = .Interactive
}
override func viewDidAppear(animated: Bool) {
super.viewDidAppear(true)
// Add notification about keyboard
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardNotification:"), name:UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardNotification:"), name:UIKeyboardWillHideNotification, object: nil)
// NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardFrameDidChange:"), name:UIKeyboardWillChangeFrameNotification, object: nil)
}
override func viewDidDisappear(animated: Bool) {
super.viewDidDisappear(true)
NSNotificationCenter.defaultCenter().removeObserver(UIKeyboardWillShowNotification)
NSNotificationCenter.defaultCenter().removeObserver(UIKeyboardWillHideNotification)
}
// The UIToolbar
var toolbar = UIToolbar()
func addDoneButtonOnKeyboard()
{
var doneToolbar: UIToolbar = UIToolbar(frame: CGRectMake(0, 0, 320, 44))
doneToolbar.barStyle = UIBarStyle.Default
var flexSpace = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FlexibleSpace, target: nil, action: nil)
var photo: UIBarButtonItem = UIBarButtonItem(title: "Add Photo", style: UIBarButtonItemStyle.Bordered, target: self, action: Selector("photoButtonAction"))
var done: UIBarButtonItem = UIBarButtonItem(title: "Done", style: UIBarButtonItemStyle.Done, target: self, action: Selector("doneButtonAction"))
var items = NSMutableArray()
items.addObject(photo)
items.addObject(flexSpace)
items.addObject(done)
doneToolbar.items = items
doneToolbar.sizeToFit()
doneToolbar.tintColor = UIColor(red: 240/225, green: 42/225, blue: 20/225, alpha: 1)
doneToolbar.translucent = true
self.toolbar = doneToolbar
self.textView.inputAccessoryView = self.toolbar
}
func keyboardFrameDidChange(notification: NSNotification) {
if let userInfo = notification.userInfo {
var endFrame = (userInfo[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.CGRectValue()
var beginFrame = (userInfo[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue()
let animationCurveRawNSN = userInfo[UIKeyboardAnimationCurveUserInfoKey] as? NSNumber
let animationCurveRaw = animationCurveRawNSN?.unsignedLongValue ?? UIViewAnimationOptions.CurveEaseInOut.rawValue
let animationCurve:UIViewAnimationOptions = UIViewAnimationOptions(rawValue: animationCurveRaw)
var animationDuration = (userInfo[UIKeyboardAnimationDurationUserInfoKey] as? NSNumber)?.doubleValue ?? 0
var newFrame = self.textView.frame
var keyboardFrameEnd = self.view.convertRect(endFrame!, toView: nil)
var keyboardFrameBegin = self.view.convertRect(beginFrame!, toView: nil)
newFrame.origin.y -= (keyboardFrameBegin.origin.y - keyboardFrameEnd.origin.y)
self.textView.frame = newFrame
UIView.animateWithDuration(animationDuration,
delay: NSTimeInterval(0),
options: animationCurve,
animations: { self.view.layoutIfNeeded() },
completion: nil)
}
}
上面的代码只会让textView
以奇怪的方式移动,我不知道如何实现像Message应用一样的效果。
更新
func keyboardFrameEnd(notification: NSNotification) {
if let userInfo = notification.userInfo {
var endFrame = (userInfo[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.CGRectValue()
// Change contentInset
self.textView.contentInset.bottom = endFrame!.height
self.textView.scrollIndicatorInsets.bottom = endFrame!.height
}
}
我将代码更改为上面的代码。但有时当我中途释放键盘时,scrollView会突然弹到底部,这非常奇怪。有什么建议吗?
答案 0 :(得分:3)
UITextView是一个滚动视图。当键盘出现时你不需要调整它的大小:你应该调整它的contentInset属性,将.bottom增加键盘的高度。
答案 1 :(得分:0)
无论您是否有tabbar,都可以申请。 它可以完美地恢复键盘移动到原始位置的视图。
// Set this up in storyboard first.
// It's a vertical spacing constraint between your text view and bottom of superview.
@IBOutlet weak var bottomSpacingConstraint: NSLayoutConstraint!
override func viewDidLoad() {
super.viewDidLoad()
// Receive(Get) Notification
NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardNotification:", name: UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardNotification:", name: UIKeyboardWillHideNotification, object: nil)
self.originalConstraint = self.keyboardHeightLayoutConstraint?.constant //for original coordinate.
}
func keyboardNotification(notification: NSNotification) {
let isShowing = notification.name == UIKeyboardWillShowNotification
var tabbarHeight: CGFloat = 0
if self.tabBarController? != nil {
tabbarHeight = self.tabBarController!.tabBar.frame.height
}
if let userInfo = notification.userInfo {
let endFrame = (userInfo[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.CGRectValue()
let duration:NSTimeInterval = (userInfo[UIKeyboardAnimationDurationUserInfoKey] as? NSNumber)?.doubleValue ?? 0
let animationCurveRawNSN = userInfo[UIKeyboardAnimationCurveUserInfoKey] as? NSNumber
let animationCurveRaw = animationCurveRawNSN?.unsignedLongValue ?? UIViewAnimationOptions.CurveEaseInOut.rawValue
let animationCurve:UIViewAnimationOptions = UIViewAnimationOptions(rawValue: animationCurveRaw)
self.keyboardHeightLayoutConstraint?.constant = isShowing ? (endFrame!.size.height - tabbarHeight) : self.originalConstraint!
UIView.animateWithDuration(duration,
delay: NSTimeInterval(0),
options: animationCurve,
animations: { self.view.layoutIfNeeded() },
completion: nil)
}
}