打开键盘时，我有一个UIViewController包含自定义细胞UITableView，在细胞内是UILabels，一对夫妇的不可编辑UITextView和一个可编辑UITextView。现在，当我点击靠近桌子底部或底部的UITextView之一时，UITextView被键盘覆盖。我试过http://cocoawithlove.com/2008/10/sliding-uitextfields-around-to-avoid.html，它对textfield/textview非常有用，但不能用自定义单元格工作。任何帮助或建议如何去做这件事？避免视图从一个UITextView一个UITableView内与自定义单元格
两个解决方案：
首选：使用一个UITableViewController，而不是一个UIViewController作为一个会自动确保您的键盘不会隐藏编辑字段。
哈克：How to make a UITextField move up when keyboard is present?
一个简单的解决方案。实现heightForFooter方法，并让它返回（比如说）100的值，并且当您选择UITableView中的单元格时，它们将仅向上滑动该高度，并且键盘不会覆盖该视图。
我一直使用双折叠解决方案。
为此，我注册了键盘显示/隐藏事件并在被叫时采取相应行动。
- (void)keyboardWillShow:(NSNotification *)note {
[self updateForKeyboardShowHide:note appearing:YES];
}
- (void)keyboardWillHide:(NSNotification *)note {
[self updateForKeyboardShowHide:note appearing:NO];
}
- (void)updateForKeyboardShowHide:(NSNotification *)note appearing:(BOOL)isAppearing {
// ignore notifications if our view isn't attached to the window
if (self.view.window == nil)
return;
CGFloat directionalModifier = isAppearing?-1:1;
CGRect keyboardBounds = [[note.userInfo valueForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue];
CGFloat animationDuration = [[note.userInfo valueForKey:UIKeyboardAnimationDurationUserInfoKey] floatValue];
// figure out table re-size based on keyboard
CGFloat keyboardHeight;
UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
if (UIInterfaceOrientationIsPortrait(orientation))
keyboardHeight = keyboardBounds.size.height;
else
keyboardHeight = keyboardBounds.size.width;
[UIView animateWithDuration:animationDuration animations:^{
// resize table
CGRect newFrame = table.frame;
newFrame.size.height += [self calculateKeyboardOffsetWithHeight:keyboardHeight] * directionalModifier;
table.frame = newFrame;
} completion:^(BOOL finished){
// scroll to selected cell
if (isAppearing) {
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:textFieldInEdit.tag inSection:0];
[table scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionBottom animated:YES];
}
}];
}
- (CGFloat)calulateKeyboardOffsetWithHeight:(CGFloat)keyboardHeight {
// This depends on the size and position of your table.
// If your table happen to go all the way to the bottom of
// the screen, you'll needs to adjust it's size by the whole keyboard height.
// You might as well ditch this method and inline the value.
return keyboardHeight;
// My table did not go to the bottom of the screen and the position was
// change dynamically so and there was long boring calculation I needed to
// do to figure out how much my table needed to shrink/grow.
}
当你的表视图包含像UITextField或UITextView和表视图足够长以覆盖屏幕数据输入字段，你将有由键盘隐藏着一个问题访问数据输入字段。
为了克服这个问题，有两种解决方案：
最简单和推荐的方法是使用UITableViewController代替UIViewController，其自动确保键盘不会隐藏编辑字段（如果可能使用这种方法避免UI调整不便）
如果您使用UIViewController和UITableView作为其子视图。您可以通过观察UIKeyboardWillShowNotification和UIKeyboardWillHideNotification
- (void)registerForKeyboardNotifications
{
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWillShow:)
name:UIKeyboardWillShowNotification object:nil]; //Posted immediately prior to the display of the keyboard
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWillHide:)
name:UIKeyboardWillHideNotification object:nil]; //Posted immediately prior to the dismissal of the keyboard.
}
- (void)keyboardWillShow:(NSNotification *)aNotification
{
CGRect keyboardBounds = [[[aNotification userInfo] objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue];
[UIView beginAnimations:nil context:nil];
[UIView setAnimationBeginsFromCurrentState:YES];
self.tableView.contentInset = UIEdgeInsetsMake(0, 0, keyboardBounds.size.height, 0); //when keyboard is up, that time just bring your text filed above the keyboard
self.tableView.scrollIndicatorInsets = UIEdgeInsetsMake(0, 0, keyboardBounds.size.height, 0);
[self.tableView scrollToRowAtIndexPath:[self findIndexPathToScroll]
atScrollPosition:UITableViewScrollPositionTop
animated:YES]; //findIndexPathToScroll implementation not shown
[UIView commitAnimations];
}
- (void)keyboardWillHide:(NSNotification *)aNotification
{
[UIView beginAnimations:nil context:nil];
[UIView setAnimationBeginsFromCurrentState:YES];
self.tableView.contentInset = UIEdgeInsetsZero; //Once keyboard is hidden then bring back your table into your original position.
self.tableView.scrollIndicatorInsets = UIEdgeInsetsZero;
[UIView commitAnimations];
}
registerForKeyboardNotifications滚动你的用户界面的框架 - 调用此方法时您加载的UITableView，即：viewDidLoad中
findIndexPathToScroll - （未显示试行），是你的业务逻辑准备索引路径表视图应滚动
removeObserver'UIKeyboardWillShowNotification'和'UIKeyboardWillHideNotif ication”无论是在dealloc和viewDidUnloadI fixed the issue. Please see my solution below:
1. First declare a global varibale called "activeFileld"
@property(nonatomic,strong)id activeFiled;
2. Create a method called "registerForKeyboardNotifications"
- (void)registerForKeyboardNotifications
{
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWillShow:)
name:UIKeyboardWillShowNotification object:nil]; //Posted immediately prior to the display of the keyboard
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWillHide:)
name:UIKeyboardWillHideNotification object:nil]; //Posted immediately prior to the dismissal of the keyboard.
}
3. Called the above method in viewWillAppear:
-(void)viewWillAppear:(BOOL)animated{
[super viewWillAppear:animated];
//Register kryboard Notification
[self registerForKeyboardNotifications];
}
4. Call the Delegate method for UitextFieldd Or UitextView
- (void)textFieldDidBeginEditing:(UITextField *)sender {
self.activeField = sender;
}
- (void)textFieldDidEndEditing:(UITextField *)sender{
self.activeField = nil;
}
- (void)textViewDidBeginEditing:(UITextView *)textView
{
// save the text view that is being edited
_notes = textView.text;
}
- (void)textViewDidEndEditing:(UITextView *)textView
{
// release the selected text view as we don't need it anymore
_activeField = nil;
}
5.
- (void)keyboardWillShow:(NSNotification *)notification
{
if([_activeField isKindOfClass:[UITextField class]]) {
NSDictionary* info = [notification userInfo];
NSLog(@"Dictionary %@",info);
CGRect kbRect = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue];
kbRect = [self.view convertRect:kbRect fromView:nil];
UIEdgeInsets contentInsets = UIEdgeInsetsMake(0.0, 0.0, kbRect.size.height, 0.0);
self.tableView.contentInset = contentInsets;
self.tableView.scrollIndicatorInsets = contentInsets;
CGRect aRect = self.view.frame;
aRect.size.height -= kbRect.size.height;
UITextField *textField = (UITextField*)_activeField;
if (!CGRectContainsPoint(aRect, textField.frame.origin)) {
[self.tableView scrollRectToVisible:textField.frame animated:YES];
}
}else if([_activeField isKindOfClass:[UITextView class]]) {
NSDictionary* info = [notification userInfo];
NSLog(@"Dictionary %@",info);
CGRect kbRect = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue];
kbRect = [self.view convertRect:kbRect fromView:nil];
UIEdgeInsets contentInsets = UIEdgeInsetsMake(0.0, 0.0, kbRect.size.height, 0.0);
self.tableView.contentInset = contentInsets;
self.tableView.scrollIndicatorInsets = contentInsets;
CGRect aRect = self.view.frame;
aRect.size.height += kbRect.size.height;
UITextView *activeTextView = (UITextView*)_activeField;
if (!CGRectContainsPoint(aRect, textField.superview.superview.frame.origin)) {
[self.tableView scrollRectToVisible:activeTextView.superview.superview.frame animated:YES];
}
}
}
// Called when the UIKeyboardWillHideNotification is received
- (void)keyboardWillHide:(NSNotification *)aNotification
{
UIEdgeInsets contentInsets = UIEdgeInsetsZero;
self.tableView.contentInset = contentInsets;
self.tableView.scrollIndicatorInsets = contentInsets;
}
好，我不能使用的UITableViewController因为我得到了很多的东西，这个视图中，而不是仅仅的UITableView。我会尝试另一个。我稍后会回到这里。 – Diffy