keyboard hiding my textview - iphone

Question

i have a simple app, it consist of 2 textview, 1 uiview as a coretext subclass, and then 1 scrollview. the others part is subviews from scrollview. I use this scrollview because i need to scroll the textviews and uiview at the same time. I already scroll all of them together, but the problem is, the keyboard hiding some lines in the textview. I have to change the frame of scrollview when keyboard appear, but it still not help.
This is my code :
UIScrollView *scrollView;
UIView *viewTextView;
UITextView *lineNumberTextView;
UITextView *codeTextView;
-(void) viewWillAppear:(BOOL)animated{
[super viewWillAppear:animated];
[[NSNotificationCenter defaultCenter]
addObserver:self
selector:#selector(keyboardWillAppear:)
name:UIKeyboardWillShowNotification
object:nil];
[[NSNotificationCenter defaultCenter]
addObserver:self
selector:#selector(keyboardWillDisappear:)
name:UIKeyboardWillHideNotification
object:nil];
self.scrollView.frame = CGRectMake(0, 88, self.codeTextView.frame.size.width,
self.codeTextView.frame.size.height);
scrollView.contentSize = CGSizeMake(self.view.frame.size.width, viewTextView.frame.size.height);
[scrollView addSubview:viewTextView];
CGAffineTransform translationCoreText = CGAffineTransformMakeTranslation(60, 7);
[viewTextView setTransform:translationCoreText];
[scrollView addSubview:lineNumberTextView];
[self.scrollView setScrollEnabled:YES];
[self.codeTextView setScrollEnabled:NO];
}
-(void)keyboardWillAppear:(NSNotification *)notification {
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:[[[notification userInfo]
objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue]];
CGRect keyboardEndingUncorrectedFrame = [[[notification userInfo]
objectForKey:UIKeyboardFrameEndUserInfoKey ] CGRectValue];
CGRect keyboardEndingFrame =
[self.view convertRect:keyboardEndingUncorrectedFrame
fromView:nil];
self.scrollView.frame = CGRectMake(0, 88, self.codeTextView.frame.size.width,
self.codeTextView.frame.size.height - keyboardEndingFrame.size.height);
[UIView commitAnimations];
}
-(void)keyboardWillDisappear:(NSNotification *) notification {
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:[[[notification userInfo]
objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue]];
CGRect keyboardEndingUncorrectedFrame = [[[notification userInfo]
objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];
CGRect keyboardEndingFrame =
[self.view convertRect:keyboardEndingUncorrectedFrame
fromView:nil];
self.scrollView.frame = CGRectMake(0, 88, self.codeTextView.frame.size.width,
self.codeTextView.frame.size.height + keyboardEndingFrame.size.height);
[UIView commitAnimations];
}
can somebody help me please?
UPDATE
this is a pic from this problem :
some text still hiding by the keyboard after i do my code
UPDATE AGAIN
i think the keyboard still hiding the text because i set the textview scroll enable to be NO. is that right??
i have add this code to the keyboardwillappear method
codeBuilderSelectedRange = self.codeTextView.selectedRange;
[self.viewTextViewScroll setContentOffset:CGPointMake(0, (CGFloat)codeBuilderSelectedRange.location) animated:YES];
but it just make the textview dissappear from the view...can somebody tell the answer?

Answer 1

#pragma mark -------------------------
#pragma mark TextView delegate Methods
- (void)textViewDidBeginEditing:(UITextView *)textView {
UIView *parentView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 60, 44)];
UIButton *infoButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 6, 60, 32)];
[infoButton setBackgroundImage:[UIImage imageNamed: #"back-btn.png"] forState:UIControlStateNormal];
[infoButton setTitle:#"Done" forState:UIControlStateNormal];
infoButton.titleLabel.font = [UIFont systemFontOfSize:13.0f];
[infoButton addTarget:self action:#selector(resignTextView) forControlEvents:UIControlEventTouchUpInside];
[parentView addSubview:infoButton];
[infoButton release];
UIBarButtonItem *customBarButtomItem = [[UIBarButtonItem alloc] initWithCustomView:parentView];
[parentView release];
self.navigationItem.rightBarButtonItem = customBarButtomItem;
[customBarButtomItem release];
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.3];
[UIView commitAnimations];
CGRect frame = self.scrollView.frame;
self.scrollView.frame.size.height = 206;
//[self.view setContentOffset:CGPointMake(0,320)];
}
- (void)resignTextView {
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.3];
[UIView commitAnimations];
CGRect frame = self.scrollView.frame;
self.scrollView.frame.size.height = 460;
[messageTextView resignFirstResponder];
self.navigationItem.rightBarButtonItem = nil;
}

Answer 2

Here is some code that I have used. Basically, what we're going to do is animate the position of the view whenever a UITextField gets focus. To do this, we must make our UIViewController a delegate of our UITextFields
The first delegate method you need to implement is - (void)textFieldDidBeginEditing:(UITextField *)textField
static const CGFloat KEYBOARD_ANIMATION_DURATION = 0.3;
static const CGFloat MINIMUM_SCROLL_FRACTION = 0.2;
static const CGFloat MAXIMUM_SCROLL_FRACTION = 0.8;
static const CGFloat PORTRAIT_KEYBOARD_HEIGHT = 216;
static const CGFloat LANDSCAPE_KEYBOARD_HEIGHT = 162;
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
CGRect textFieldRect = [self.view.window convertRect:textField.bounds
fromView:textField];
CGRect viewRect = [self.view.window convertRect:self.view.bounds
fromView:self.view];
CGFloat midline = textFieldRect.origin.y + 0.5
* textFieldRect.size.height;
CGFloat numerator = midline - viewRect.origin.y
- MINIMUM_SCROLL_FRACTION * viewRect.size.height;
CGFloat denominator = (MAXIMUM_SCROLL_FRACTION - MINIMUM_SCROLL_FRACTION)
* viewRect.size.height;
CGFloat heightFraction = numerator / denominator;
if (heightFraction < 0.0)
{
heightFraction = 0.0;
}
else if (heightFraction > 1.0)
{
heightFraction = 1.0;
}
UIInterfaceOrientation orientation =
[[UIApplication sharedApplication] statusBarOrientation];
if (orientation == UIInterfaceOrientationPortrait ||
orientation == UIInterfaceOrientationPortraitUpsideDown)
{
animatedDistance = floor(PORTRAIT_KEYBOARD_HEIGHT * heightFraction);
}
else
{
animatedDistance = floor(LANDSCAPE_KEYBOARD_HEIGHT * heightFraction);
}
CGRect viewFrame = self.view.frame;
viewFrame.origin.y -= animatedDistance;
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationDuration:KEYBOARD_ANIMATION_DURATION];
[self.view setFrame:viewFrame];
[UIView commitAnimations];
}
}
Now that the view has been 'pushed up' when a UITextField is selected, we want to make sure that we slide it back down when we're done:
- (void) textFieldDidEndEditing:(UITextField *)textField
{
CGRect viewFrame = self.view.frame;
viewFrame.origin.y += animatedDistance;
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationDuration:KEYBOARD_ANIMATION_DURATION];
[self.view setFrame:viewFrame];
[UIView commitAnimations];
}
This was taken from one of my favorite Cocoa blogs, Cocoa With Love. Cheezy name, but Matt's got some great posts on Objective-C development.

Answer 3

Specifically for UITextView (not UITextField)
you may have a look at the following tutorial: http://codingcluster.blogspot.in/2012/03/iphone-make-uitextview-move-up-when.html
i have implemented it and it is working as expected(at least for me)