-(void)viewWillAppear:(BOOL)animated
{
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:self.view.window];
[super viewWillAppear:animated];
}
-(void)viewWillDisappear:(BOOL)animated
{
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];
[super viewWillDisappear:animated];
}
-(void)keyboardWillShow:(NSNotification *)notif
{
NSDictionary*info=[notif userInfo];
NSValue* aValue= [info objectForKey:UIKeyboardBoundsUserInfoKey];
CGSize keyboardSize=[aValue CGRectValue].size;
float bottomPoint= (text1.frame.origin.y+text1.frame.size.height+5);
//float bottomPoint= (text2.frame.origin.y+text2.frame.size.height+5);
//float bottomPoint= (text3.frame.origin.y+text3.frame.size.height+5);
scrollAmount=keyboardSize.height - (self.view.frame.size.height - bottomPoint);
if(scrollAmount > 0)
{
moveViewUp = YES;
[self scrollTheView:YES];
}
else
moveViewUp = NO;
}
}
-(void)scrollTheView:(BOOL) movedUp
{
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.3];
CGRect rect = self.view.frame;
if(movedUp)
{
rect.origin.y -= scrollAmount;
}
else
{
rect.origin.y += scrollAmount;
}
self.view.frame = rect;
[UIView commitAnimations];
}
-(BOOL)text1ShouldReturn:(UITextField *)theTextField
{
[theTextField resignFirstResponder];
if(moveViewUp)
[self scrollTheView:NO];
return YES;
}
I have written this code to scroll the view but it is not returning when the keyboard disappears.
You have not subscribed to the UIKeyboardWillHideNotifcation, only Show - thus it will not do anything when the keyboard hides.
Related
I have a view like you can see over here.
You can see that I have an header image with below a lot of textfields. Only the UITextfields Adres - Postcode - Gemeente - Tel.nr - Email - BTWnr. are disappearing behind the keyboard.
I have some code, that is working for the UITextfield of Adres. But when I want to implement more it always takes the animation for the UITextfield of Adres.
Here is what I have in code
#define kOFFSET_FOR_KEYBOARD 80.0
#define kOFFSET_FOR_KEYBOARD2 120.0
-(void)keyboardWillShow {
NSLog(#"Keyboard frame now is %f",self.keyboardView.frame.origin.y);
// Animate the current view out of the way
if (self.keyboardView.frame.origin.y >= 198)
{
NSLog(#"keyboardWillShow 1");
[self setViewMovedUp2:NO];
}
else if (self.keyboardView.frame.origin.y < 198)
{
NSLog(#"keyboardWillShow 2");
[self setViewMovedUp:YES];
}
}
-(void)keyboardWillHide {
NSLog(#"Keyboard frame ATM %f",self.keyboardView.frame.origin.y);
if (self.keyboardView.frame.origin.y >= 198)
{
NSLog(#"keyboardWillHide 1");
[self setViewMovedUp:YES];
}
else if (self.keyboardView.frame.origin.y < 198)
{
NSLog(#"keyboardWillHide 2");
[self setViewMovedUp:NO];
}
}
-(void)textFieldDidBeginEditing:(UITextField *)sender
{
if ([sender isEqual:txtAdres])
{
NSLog(#"sender is adres");
//move the main view, so that the keyboard does not hide it.
if (self.keyboardView.frame.origin.y >= 198)
{
[self setViewMovedUp:YES];
}
}
if ([sender isEqual:txtPostcode])
{
NSLog(#"sender is postcode");
//move the main view, so that the keyboard does not hide it.
if (self.keyboardView.frame.origin.y >= 198)
{
[self setViewMovedUp2:YES];
}
}
}
//method to move the view up/down whenever the keyboard is shown/dismissed
-(void)setViewMovedUp:(BOOL)movedUp
{
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.3]; // if you want to slide up the view
CGRect rect = self.keyboardView.frame;
if (movedUp)
{
// 1. move the view's origin up so that the text field that will be hidden come above the keyboard
// 2. increase the size of the view so that the area behind the keyboard is covered up.
rect.origin.y -= kOFFSET_FOR_KEYBOARD;
rect.size.height += kOFFSET_FOR_KEYBOARD;
}
else
{
// revert back to the normal state.
rect.origin.y += kOFFSET_FOR_KEYBOARD;
rect.size.height -= kOFFSET_FOR_KEYBOARD;
}
self.keyboardView.frame = rect;
[UIView commitAnimations];
}
-(void)setViewMovedUp2:(BOOL)movedUp
{
NSLog(#"setViewMovedUp2 called");
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.3]; // if you want to slide up the view
CGRect rect = self.keyboardView.frame;
if (movedUp)
{
// 1. move the view's origin up so that the text field that will be hidden come above the keyboard
// 2. increase the size of the view so that the area behind the keyboard is covered up.
rect.origin.y -= kOFFSET_FOR_KEYBOARD2;
rect.size.height += kOFFSET_FOR_KEYBOARD2;
}
else
{
// revert back to the normal state.
rect.origin.y += kOFFSET_FOR_KEYBOARD2;
rect.size.height -= kOFFSET_FOR_KEYBOARD2;
}
self.keyboardView.frame = rect;
[UIView commitAnimations];
}
And in my ViewWillAppear I do this
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardWillShow)
name:UIKeyboardWillShowNotification
object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardWillHide)
name:UIKeyboardWillHideNotification
object:nil];
Can anybody help me with this ?
Please try to use this one ...I hope it may help you. And you can put your value on 200 in this line where you wanna your textfield.
CGFloat avaliableHeight = applicationFrame.size.height - 200;
- (void)scrollViewToCenterOfScreen:(UIView *)theView
{
CGFloat viewCenterY = theView.center.y;
CGRect applicationFrame = [[UIScreen mainScreen] applicationFrame];
CGFloat avaliableHeight = applicationFrame.size.height - 200;
CGFloat y = viewCenterY - avaliableHeight / 2.0f;
if (y < 0)
{
y = 0;
}
[scrollView setContentOffset:CGPointMake(0, y) animated:YES];
}
-(BOOL)textFieldShouldBeginEditing:(UITextField *)textField
{
[self scrollViewToCenterOfScreen:textField];
return YES;
}
i would suggest , use a dropin replacement library TPKeyboardAvoiding which handles all the work for moving the views, when Keyboard is shown, Its a Very easy way of achieving that
I actually came across this problem yesterday. Here's my code:
#define kOFFSET_FOR_KEYBOARD 80.0
//This decides how many pixels to move the view
-(void)keyboardWillShow
{
// Animate the current view out of the way
if (self.view.frame.origin.y >= 0)
{
[self setViewMovedUp:YES];
}
else if (self.view.frame.origin.y < 0)
{
[self setViewMovedUp:NO];
}
}
-(void)keyboardWillHide
{
if (self.view.frame.origin.y >= 0)
{
[self setViewMovedUp:YES];
}
else if (self.view.frame.origin.y < 0)
{
[self setViewMovedUp:NO];
}
}
-(void)textFieldDidBeginEditing:(UITextField *)sender
{
if ([sender isEqual:doNotCover])
{
//move the main view, so that the keyboard does not hide it.
if (self.view.frame.origin.y >= 0)
{
[self setViewMovedUp:YES];
}
}
}
//method to move the view up/down whenever the keyboard is shown/dismissed
-(void)setViewMovedUp:(BOOL)movedUp
{
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.3]; // if you want to slide up the view
CGRect rect = self.view.frame;
if (movedUp)
{
// 1. move the view's origin up so that the text field that will be hidden come above the keyboard
// 2. increase the size of the view so that the area behind the keyboard is covered up.
rect.origin.y -= kOFFSET_FOR_KEYBOARD;
rect.size.height += kOFFSET_FOR_KEYBOARD;
}
else
{
// revert back to the normal state.
rect.origin.y += kOFFSET_FOR_KEYBOARD;
rect.size.height -= kOFFSET_FOR_KEYBOARD;
}
self.view.frame = rect;
[UIView commitAnimations];
}
-(void)setViewMovedUp:(BOOL)movedUp
{
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.3]; // if you want to slide up the view
CGRect rect = self.view.frame;
if (movedUp)
{
// 1. move the view's origin up so that the text field that will be hidden come above the keyboard
// 2. increase the size of the view so that the area behind the keyboard is covered up.
rect.origin.y -= kOFFSET_FOR_KEYBOARD;
rect.size.height += kOFFSET_FOR_KEYBOARD;
}
else
{
// revert back to the normal state.
rect.origin.y += kOFFSET_FOR_KEYBOARD;
rect.size.height -= kOFFSET_FOR_KEYBOARD;
}
}
self.view.frame = rect;
[UIView commitAnimations];
- (void)viewWillAppear:(BOOL)animated
{
// register for keyboard notifications
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardWillShow)
name:UIKeyboardWillShowNotification
object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardWillHide)
name:UIKeyboardWillHideNotification
object:nil];
}
- (void)viewWillDisappear:(BOOL)animated
{
// unregister for keyboard notifications while not visible.
[[NSNotificationCenter defaultCenter] removeObserver:self
name:UIKeyboardWillShowNotification
object:nil];
[[NSNotificationCenter defaultCenter] removeObserver:self
name:UIKeyboardWillHideNotification
object:nil];
}
Hi can someone help me create this feature, I would like to have a text box at the bottom of my app, and as soon as the user clicks on it, it should raise that text box to the middle of screen right above the keyboard. Similar to skype app, thanks!
Try This
#define kKeyboardAnimationDuration 0.3
#interface YourViewController:UIViewController
{
BOOL keyboardIsShown;
}
And then in your implementation
- (void)viewDidLoad
{
// register for keyboard notifications
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardWillShow:)
name:UIKeyboardWillShowNotification
object:self.view.window];
// register for keyboard notifications
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardWillHide:)
name:UIKeyboardWillHideNotification
object:self.view.window];
keyboardIsShown = NO;
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
// unregister for keyboard notifications while not visible.
[[NSNotificationCenter defaultCenter] removeObserver:self
name:UIKeyboardWillShowNotification
object:nil];
// unregister for keyboard notifications while not visible.
[[NSNotificationCenter defaultCenter] removeObserver:self
name:UIKeyboardWillHideNotification
object:nil];
}
#pragma mark - Keyboard Events
- (void)keyboardWillShow:(NSNotification *)n
{
if (keyboardIsShown)
{
return;
}
NSDictionary* userInfo = [n userInfo];
CGSize keyboardSize = [[userInfo objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
CGRect viewFrame = self.view.frame;
viewFrame.origin.y-= (keyboardSize.height);
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationDuration:kKeyboardAnimationDuration];
[self.view setFrame:viewFrame];
[UIView commitAnimations];
keyboardIsShown = YES;
}
- (void)keyboardWillHide:(NSNotification *)n
{
NSDictionary* userInfo = [n userInfo];
CGSize keyboardSize = [[userInfo objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
CGRect viewFrame = self.view.frame;
viewFrame.origin.y+= (keyboardSize.height);
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationDuration:kKeyboardAnimationDuration];
[self.view setFrame:viewFrame];
[UIView commitAnimations];
keyboardIsShown = NO;
}
i have used following code to move the screen upwards when we hit on text field ,,this code was working fine with xcode 3 but its not working with xcode 4 ,,its not giving any error but when we touch on the text field screen ill go upwards to a greater height ,,some times wont come back ti original position
- (void)keyboardWasShown:(NSNotification *)aNotification {
if ( keyboardShown )
return;
if ((activeField==tfText[4])||(activeField==tfText[5]))
{
#if __IPHONE_OS_VERSION_MIN_REQUIRED <= __IPHONE_3_2
CGRect _keyboardEndFrame;
[[aNotification.userInfo valueForKey:UIKeyboardBoundsUserInfoKey] getValue:&_keyboardEndFrame];
CGFloat keyboardSize;
if ([[UIDevice currentDevice] orientation] == UIDeviceOrientationPortrait || [[UIDevice currentDevice] orientation] == UIDeviceOrientationPortraitUpsideDown)
{
keyboardSize = _keyboardEndFrame.size.height;
}
else {
keyboardSize = _keyboardEndFrame.size.width;
}
NSTimeInterval animationDuration = 0.300000011920929;
CGRect frame = self.view.frame;
frame.origin.y -= keyboardSize-70;
frame.size.height += keyboardSize-70;
[UIView beginAnimations:#"ResizeForKeyboard" context:nil];
[UIView setAnimationDuration:animationDuration];
self.view.frame = frame;
[UIView commitAnimations];
#else
NSDictionary *info = [aNotification userInfo];
NSValue *aValue = [info objectForKey:UIKeyboardBoundsUserInfoKey];
CGSize keyboardSize = [aValue CGRectValue].size;
NSTimeInterval animationDuration = 0.300000011920929;
CGRect frame = self.view.frame;
frame.origin.y -= keyboardSize.height-70;
frame.size.height += keyboardSize.height-70;
[UIView beginAnimations:#"ResizeForKeyboard" context:nil];
[UIView setAnimationDuration:animationDuration];
self.view.frame = frame;
[UIView commitAnimations];
#endif
viewMoved = YES;
}
keyboardShown = YES;
}
- (void)keyboardWasHidden:(NSNotification *)aNotification {
if ( viewMoved ) {
#if __IPHONE_OS_VERSION_MIN_REQUIRED <= __IPHONE_3_2
CGRect _keyboardEndFrame;
[[aNotification.userInfo valueForKey:UIKeyboardBoundsUserInfoKey] getValue:&_keyboardEndFrame];
CGFloat keyboardSize;
if ([[UIDevice currentDevice] orientation] == UIDeviceOrientationPortrait || [[UIDevice currentDevice] orientation] == UIDeviceOrientationPortraitUpsideDown) {
keyboardSize = _keyboardEndFrame.size.height;
}
else {
keyboardSize = _keyboardEndFrame.size.width;
}
NSTimeInterval animationDuration = 0.300000011920929;
CGRect frame = self.view.frame;
frame.origin.y += keyboardSize-70;
frame.size.height -= keyboardSize-70;
[UIView beginAnimations:#"ResizeForKeyboard" context:nil];
[UIView setAnimationDuration:animationDuration];
self.view.frame = frame;
[UIView commitAnimations];
#else
NSValue *aValue = [info objectForKey:UIKeyboardBoundsUserInfoKey];
CGSize keyboardSize = [aValue CGRectValue].size;
NSTimeInterval animationDuration = 0.300000011920929;
CGRect frame = self.view.frame;
frame.origin.y += keyboardSize.height-70;
frame.size.height -= keyboardSize.height-70;
[UIView beginAnimations:#"ResizeForKeyboard" context:nil];
[UIView setAnimationDuration:animationDuration];
self.view.frame = frame;
[UIView commitAnimations];
#endif
viewMoved = NO;
}
keyboardShown = NO;
}
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
activeField = textField;
}
- (void)textFieldDidEndEditing:(UITextField *)textField
{
activeField = nil;
// Additional Code
}
using following code i am calling the above methods
- (void)viewDidLoad
{
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardWasShown:)
name:UIKeyboardDidShowNotification
object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardWasHidden:)
name:UIKeyboardDidHideNotification
object:nil];
}
- (void)viewDidLoad
{
[super viewDidLoad];
// register for keyboard notifications
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardWillShow:)
name:UIKeyboardWillShowNotification
object:self.view.window];
// register for keyboard notifications
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardWillHide:)
name:UIKeyboardWillHideNotification
object:self.view.window];
keyboardIsShown = NO;
//make contentSize bigger than your scrollSize (you will need to figure out for your own use case)
CGSize scrollContentSize = CGSizeMake(320, 345);
self.scrollView.contentSize = scrollContentSize;
}
- (void)viewDidUnload {
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
// unregister for keyboard notifications while not visible.
[[NSNotificationCenter defaultCenter] removeObserver:self
name:UIKeyboardWillShowNotification
object:nil];
// unregister for keyboard notifications while not visible.
[[NSNotificationCenter defaultCenter] removeObserver:self
name:UIKeyboardWillHideNotification
object:nil];
}
- (void)keyboardWillHide:(NSNotification *)n
{
NSDictionary* userInfo = [n userInfo];
// get the size of the keyboard
NSValue* boundsValue = [userInfo objectForKey:UIKeyboardBoundsUserInfoKey];
CGSize keyboardSize = [boundsValue CGRectValue].size;
// resize the scrollview
CGRect viewFrame = self.scrollView.frame;
// I'm also subtracting a constant kTabBarHeight because my UIScrollView was offset by the UITabBar so really only the portion of the keyboard that is leftover pass the UITabBar is obscuring my UIScrollView.
viewFrame.size.height += (keyboardSize.height - kTabBarHeight);
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationBeginsFromCurrentState:YES];
// The kKeyboardAnimationDuration I am using is 0.3
[UIView setAnimationDuration:kKeyboardAnimationDuration];
[self.scrollView setFrame:viewFrame];
[UIView commitAnimations];
keyboardIsShown = NO;
}
- (void)keyboardWillShow:(NSNotification *)n
{
// This is an ivar I'm using to ensure that we do not do the frame size adjustment on the UIScrollView if the keyboard is already shown. This can happen if the user, after fixing editing a UITextField, scrolls the resized UIScrollView to another UITextField and attempts to edit the next UITextField. If we were to resize the UIScrollView again, it would be disastrous. NOTE: The keyboard notification will fire even when the keyboard is already shown.
if (keyboardIsShown) {
return;
}
NSDictionary* userInfo = [n userInfo];
// get the size of the keyboard
NSValue* boundsValue = [userInfo objectForKey:UIKeyboardBoundsUserInfoKey];
CGSize keyboardSize = [boundsValue CGRectValue].size;
// resize the noteView
CGRect viewFrame = self.scrollView.frame;
// I'm also subtracting a constant kTabBarHeight because my UIScrollView was offset by the UITabBar so really only the portion of the keyboard that is leftover pass the UITabBar is obscuring my UIScrollView.
viewFrame.size.height -= (keyboardSize.height - kTabBarHeight);
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationBeginsFromCurrentState:YES];
// The kKeyboardAnimationDuration I am using is 0.3
[UIView setAnimationDuration:kKeyboardAnimationDuration];
[self.scrollView setFrame:viewFrame];
[UIView commitAnimations];
keyboardIsShown = YES;
}
I am trying to make a UIScrollView scroll when the user starts editing a UITextField and the text field is hidden by the keyboard. I am using an example from the following thread.
How to make a UITextField move up when keyboard is present
I have four UITextFields in my view. When the keyboard is shown for the first time the view does not scroll automatically. If I click another text field with the keyboard shown, the UIScrollView scrolls as intended.
Hiding the keyboard (by tapping the "Done" button) and tapping a UITextField again the same issue occurs: the UIScrollView does not scroll at first but when changing focus to another text field it scrolls perfectly.
Can anyone please help me?
In viewDidLoad I set the size of the scrollView
keyboardIsShown = NO;
CGSize scrollContentSize = CGSizeMake(320, 350);
self.scrollView.contentSize = scrollContentSize;
I register for the keyboard notifications in viewWillAppear
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:self.view.window];
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:self.view.window];
Then I unregister in viewWillDisappear
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];
The following two methods are called by the notifications.
- (void)keyboardWillShow:(NSNotification *)n {
if (keyboardIsShown) {
return;
}
NSDictionary *userInfo = [n userInfo];
NSValue *boundsValue = [userInfo objectForKey:UIKeyboardFrameBeginUserInfoKey];
CGSize keyboardSize = [boundsValue CGRectValue].size;
CGRect viewFrame = self.scrollView.frame;
viewFrame.size.height -= (keyboardSize.height - 50);
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationDuration:0.3];
[self.scrollView setFrame:viewFrame];
[UIView commitAnimations];
keyboardIsShown = YES;
}
- (void)keyboardWillHide:(NSNotification *)n {
NSDictionary *userInfo = [n userInfo];
NSValue *boundsValue = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];
CGSize keyboardSize = [boundsValue CGRectValue].size;
CGRect viewFrame = self.scrollView.frame;
viewFrame.size.height += (keyboardSize.height - 50);
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationDuration:0.3];
[self.scrollView setFrame:viewFrame];
[UIView commitAnimations];
keyboardIsShown = NO;
}
If you want to show the textfeild when keyboard is visible then use the code below. Don't go with the scrollview. If it is compulsory to use a scrollView then neglect this answer.
#define kOFFSET_FOR_KEYBOARD 280.0
- (void)keyboardWillHide:(NSNotification *)notif {
[self setViewMoveUp:NO];
}
- (void)keyboardWillShow:(NSNotification *)notif{
[self setViewMoveUp:YES];
}
- (void)textFieldDidBeginEditing:(UITextField *)textField {
stayup = YES;
[self setViewMoveUp:YES];
}
- (void)textFieldDidEndEditing:(UITextField *)textField {
stayup = NO;
[self setViewMoveUp:NO];
}
//method to move the view up/down whenever the keyboard is shown/dismissed
-(void)setViewMoveUp:(BOOL)moveUp
{
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.3]; // if you want to slide up the view
[UIView setAnimationBeginsFromCurrentState:YES];
CGRect rect = self.view.frame;
if (moveUp)
{
// 1. move the view's origin up so that the text field that will be hidden come above the keyboard
// 2. increase the size of the view so that the area behind the keyboard is covered up.
if (rect.origin.y == 0 ) {
rect.origin.y -= kOFFSET_FOR_KEYBOARD;
//rect.size.height += kOFFSET_FOR_KEYBOARD;
}
}
else
{
if (stayup == NO) {
rect.origin.y += kOFFSET_FOR_KEYBOARD;
//rect.size.height -= kOFFSET_FOR_KEYBOARD;
}
}
self.view.frame = rect;
[UIView commitAnimations];
}
Try this methods. Edit it according to your requirement.
I am using keyboardWasShown and keyboardWillBeHidden notification for sliding the view to get the visible text view.
I have a UITabBar application with six tabs.
In each view I am using the UINavigationController.
In the detail view of each UITableViewCell I am using the keyboard notifications.
So the problem is that the keyboard notifications work for the first time that I will use . on on the other tabs it won't work .
The code is as follows :
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardWasShown:)
name:UIKeyboardDidShowNotification
object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardWasHidden:)
name:UIKeyboardDidHideNotification
object:nil];
and the methods
- (void)keyboardWasShown:(NSNotification *)aNotification {
if ( keyboardShown )
return;
NSDictionary *info = [aNotification userInfo];
NSValue *aValue = [info objectForKey:UIKeyboardBoundsUserInfoKey];
CGSize keyboardSize = [aValue CGRectValue].size;
NSTimeInterval animationDuration = 0.300000011920929;
CGRect frame = self.view.frame;
frame.origin.y -= keyboardSize.height-100;
frame.size.height += keyboardSize.height-100;
[UIView beginAnimations:#"ResizeForKeyboard" context:nil];
[UIView setAnimationDuration:animationDuration];
self.view.frame = frame;
[UIView commitAnimations];
viewMoved = YES;
keyboardShown = YES;
}
- (void)keyboardWasHidden:(NSNotification *)aNotification {
if ( viewMoved && tvAddreview) {
NSDictionary *info = [aNotification userInfo];
NSValue *aValue = [info objectForKey:UIKeyboardBoundsUserInfoKey];
CGSize keyboardSize = [aValue CGRectValue].size;
NSTimeInterval animationDuration = 0.300000011920929;
CGRect frame = self.view.frame;
frame.origin.y += keyboardSize.height-100;
frame.size.height -= keyboardSize.height-100;
[UIView beginAnimations:#"ResizeForKeyboard" context:nil];
[UIView setAnimationDuration:animationDuration];
self.view.frame = frame;
[UIView commitAnimations];
viewMoved = NO;
}
keyboardShown = NO;
}
you should dothis in eachClass like this:
-(void) viewWillAppear: (BOOL)animated
{
[super viewWillAppear:animated];
NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
[nc addObserver:self
selector:#selector(keyboardWasShown:)
name:UIKeyboardWillShowNotification
object:nil];
[nc addObserver:self
selector:#selector(keyboardWasHidden:)
name:UIKeyboardWillHideNotification
object:nil];
}
- (void) viewWillDisappear: (BOOL)animated{
[super viewWillDisappear:animated];
NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
[nc removeObserver:self
name:UIKeyboardWillShowNotification
object:nil];
[nc removeObserver:self
name:UIKeyboardWillHideNotification
object:nil];
}
because the notifications are on the application level not to your class level. So if you have added them in one class and not in all classes, then going to the next class. the notification will still call the the key keyboardWasShown: and the other from the class in which you added the notifications hence your local variables like...
viewMoved = YES;
keyboardShown = YES;
will throw the bad excess exceptions
In your case it is also required to do in all 6 view controllers
Hope this helps.