UIKeyBoard 在方向更改为横向时调整大小
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【中文标题】UIKeyBoard 在方向更改为横向时调整大小【英文标题】:UIKeyBoard resize on orientation change to landscape 【发布时间】:2010-03-19 02:40:18 【问题描述】:这是一个非常菜鸟的问题。我在底部有一个 UIToolBar,它应该在显示 UIKeyBoard 时随键盘动画地上下移动。我在 UIKeyBoard Notifications 的帮助下完成了这项工作。我们正在谈论的视图启用了拆分视图。当设备方向是横向时,两个视图都显示为列[希望有意义]。
当显示键盘时,我会这样做
CGSize keyBoardSize = [[notificationInfo objectForKey:UIKeyboardFrameEndUserInfoKey]CGRectValue].size;
CGRect toolbarFrame= [BottomToolBar frame];
toolbarFrame.origin.y -= keyBoardSize.height;
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.3];
BottomToolBar .frame = viewFrame;
[UIView commitAnimations];
当键盘隐藏时我会这样做
toolbarFrame.origin.y += keyBoardSize.height;
我的问题是当设备方向变为横向时,当键盘可见时,底部工具栏消失了。我看到它迅速上升。我不知道如何解决这个问题。有人可以帮忙吗?另外,有没有办法不让键盘跨越拆分视图中的两个视图?
【问题讨论】:
【参考方案1】:我也有这个问题,我能想到的就是关闭键盘并重新显示它(辞职然后再次成为第一响应者)。但这似乎很不令人满意。
还请注意,您应该将矩形从屏幕坐标转换为视图坐标。 (屏幕坐标不旋转。)
CGRect keyboardRect = [[notificationInfo objectForKey:UIKeyboardFrameEndUserInfoKey]CGRectValue];
keyboardRect = [[BottomToolBar superview] convertRect:keyboardRect fromView:nil];
更新:您必须注册 UIKeyboardWillShowNotification,然后界面旋转时将调用您的操作:)
另见: https://devforums.apple.com/message/181482#181482
【讨论】:
如果您试图将工具栏保持在键盘框架上方并且显示通话状态栏,则此转换是必不可少的。您可以在模拟器中使用键盘命令 CMD + Y 进行测试【参考方案2】:- (void)viewDidLoad
[super viewDidLoad];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
- (void)keyboardWillShow:(NSNotification *)aNotification
CGRect keyboardBounds;
[[aNotification.userInfo valueForKey:UIKeyboardFrameEndUserInfoKey] getValue: &keyboardBounds];
CGFloat keyboardHeight;
switch ([UIApplication sharedApplication].statusBarOrientation)
case UIInterfaceOrientationPortrait:
case UIInterfaceOrientationPortraitUpsideDown:
keyboardHeight = keyboardBounds.size.height;
break;
case UIInterfaceOrientationLandscapeLeft:
case UIInterfaceOrientationLandscapeRight:
keyboardHeight = keyboardBounds.size.width;
break;
NSTimeInterval animationDuration = [[[aNotification userInfo] objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];
CGRect rect = table.frame;
rect.size.height -= keyboardHeight;
[UIView beginAnimations:@"ResizeForKeyboardShow" context:nil];
[UIView setAnimationDuration:animationDuration];
table.frame = rect;
[UIView commitAnimations];
- (void)keyboardWillHide:(NSNotification *)aNotification
CGRect keyboardBounds;
[[aNotification.userInfo valueForKey:UIKeyboardFrameEndUserInfoKey] getValue: &keyboardBounds];
CGFloat keyboardHeight;
switch ([UIApplication sharedApplication].statusBarOrientation)
case UIInterfaceOrientationPortrait:
case UIInterfaceOrientationPortraitUpsideDown:
keyboardHeight = keyboardBounds.size.height;
break;
case UIInterfaceOrientationLandscapeLeft:
case UIInterfaceOrientationLandscapeRight:
keyboardHeight = keyboardBounds.size.width;
break;
NSTimeInterval animationDuration = [[[aNotification userInfo] objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];
CGRect rectTable = table.frame;
rectTable.size.height += keyboardHeight;
[UIView beginAnimations:@"ResizeForKeyboard" context:nil];
[UIView setAnimationDuration:animationDuration];
table.frame = rectTable;
[UIView commitAnimations];
【讨论】:
别忘了 [[NSNotificationCenter defaultCenter] removeObserver:self];关于 viewDidUnload 和 dealloc 仅供参考:您可以使用方便的UIDeviceOrientationIsPortrait
宏来代替那个大的switch
和case
怪物。 :)【参考方案3】:
UITextFields 有一个 inputAccessoryView 属性,允许在 UIKeyboard 上方添加一个 UIToolBar。
【讨论】:
是的,但是当键盘隐藏时,OP 希望工具栏在屏幕底部可见。 没问题,只要把底部的工具栏设置为inputAccessoryView就大功告成了。【参考方案4】:- (void)viewDidLoad // Or somewhere else
[super viewDidLoad];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(kbDidChange:) UIKeyboardDidChangeFrameNotification object:nil];
- (void)kbDidChange:(NSNotification *)notification
NSDictionary* keyboardInfo = [notification userInfo];
CGRect keyboardFrame = [[keyboardInfo valueForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];
keyboardFrame = [[messageBar superview] convertRect:keyboardFrame fromView:nil];
CGRect ol = messageBar.frame; // messageBar is your UIToolbar..
ol.origin.y = keyboardFrame.origin.y-44;
messageBar.frame = ol;
【讨论】:
您是否可以考虑解释一下这段代码,以及为什么它回答了手头的问题?【参考方案5】:这些答案效果很好,除了外部键盘。当存在硬件键盘时,消息中传递的键盘框架的“高度”属性看起来仍然与虚拟键盘相同,这意味着此代码从视图框架中减去高度现有的键盘(创造一个尴尬的空间)。
我发现的最佳解决方案是注意键盘框架的“y”属性被指定在屏幕底部(这意味着虚拟键盘实际上是存在的,就在屏幕之外)。
【讨论】:
【参考方案6】:解决方案是为基于块的动画设置选项UIViewAnimationOptionBeginFromCurrentState
,或者
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:[notificationInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] floatValue]];
[UIView setAnimationBeginsFromCurrentState:YES];
BottomToolBar.frame = viewFrame;
[UIView commitAnimations];
在你的情况下。这样,当从纵向更改为横向时,视图不会突然移动。
【讨论】:
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