I am trying to add UIScrollView in Search Bar and Search Display Controller but the problem is that Search Bar gets hidden when I click on it. Please give some suggestion to resolve this.
I am using the following keyboard show/hide notifications.
- (void)registerForKeyboardNotifications {
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(keyBoardWasShown:) name:UIKeyboardDidShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(keyboardWillBeHidden:) name:UIKeyboardWillHideNotification object:nil];
}
- (void)deregisterFromKeyboardNotifications {
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardDidHideNotification object:nil];
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];
}
- (void)keyBoardWasShown {
CGPoint buttonOrigin = self.txtfield2.frame.origin;
CGFloat buttonHeight = self.txtfield2.frame.size.height;
CGRect visibleRect = self.view.frame; visibleRect.size.height -= keyboardSize.height;
if (!CGRectContainsPoint(visibleRect, buttonOrigin)){
CGPoint scrollPoint = CGPointMake(0.0, buttonOrigin.y - visibleRect.size.height + buttonHeight);
[self.scrollView setContentOffset:scrollPoint animated:YES];
}
}
Related
I want my view to scroll down when keyboard hides, the thing is that for the first time the view comes from outside of its frame(first image I have attached) but if I hide keyboard for the second time the view scrolls down in a correct way(second figure).
Here is the code related to this part:
- (void)viewDidUnload
{
[[NSNotificationCenter defaultCenter] removeObserver:self
name:UIKeyboardWillShowNotification
object:nil];
[[NSNotificationCenter defaultCenter] removeObserver:self
name:UIKeyboardWillHideNotification
object:nil];
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardDidShow:)
name:UIKeyboardDidShowNotification
object:self.view.window];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardDidHide:)
name:UIKeyboardDidHideNotification
object:nil];
}
- (void)keyboardDidShow:(NSNotification *)notification
{
[_scrollView setScrollEnabled:TRUE];
}
- (void)keyboardDidHide:(NSNotification *)notification
{
[UIView animateWithDuration:4 animations:^{
NSDictionary* info = [notification userInfo];
//---obtain the size of the keyboard---
NSValue* aValue = [info objectForKey:UIKeyboardFrameEndUserInfoKey];
CGRect keyboardRect = [self.view convertRect:[aValue CGRectValue] fromView:nil];
//---resize the scroll view back to the original size (without keyboard)---
CGRect viewFrame = [self.view frame];
viewFrame.size.height += keyboardRect.size.height;
self.scrollView.frame = viewFrame;
}];
}
I have a UISearchBar that needs to be compressed (see screenshot) and then expand to a larger size when it is touched or isActive.
How would I go about doing this? Currently my search bar is placed in the view via IB.
thanks
Use this delegate of the search bar :
- (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar
{
[self setTheSearchBarWithRect:newRect];//newRect is CGRect;
}
-(void)setTheSearchBarWithRect:(CGRect)frame{
[UIView animateWithDuration:(1.5f)
delay:0
options: UIViewAnimationOptionCurveEaseInOut
animations:^{
yourSearchBar.frame = frame;
}
completion:^(BOOL finished){
}];
}
and in the below delegate call the above function with its original frame.
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar;
- (void)searchBarCancelButtonClicked:(UISearchBar *) searchBar;
I would suggest adding a NSNotifcation listener for the keyboard showing/hiding notifications and based on this adjust the UISearchBar frame:
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
[nc addObserver:self selector:#selector(adjustFrame:) name:UIKeyboardWillShowNotification object:nil];
[nc addObserver:self selector:#selector(adjustFrame:) name:UIKeyboardWillHideNotification object:nil];
}
We need to remove the listener when the view is going to disappear:
- (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];
}
And now we need the 2 custom functions to adjust the frame:
- (void)adjustFrame:(NSNotification *) notification {
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.3];
[UIView setAnimationBeginsFromCurrentState:YES];
if ([[notification name] isEqual:UIKeyboardWillHideNotification]) {
// revert back to the normal state.
self.searchBar.frame = CGRectMake (100,50,100,self.searchBar.frame.size.Height);
}
else {
//resize search bar
self.searchBar.frame = CGRectMake (10,50,200,self.searchBar.frame.size.Height);
}
[UIView commitAnimations];
}
You should just change search bar frame (location and size) on editing start and ending.
for example:
on start
sbar.frame = CGRectMake(sbar.frame.origin.x - 100., sbar.frame.origin.y, sbar.frame.size.x + 100., sbar.frame.size.y);
on edit end just back control at original place:
sbar.frame = CGRectMake(sbar.frame.origin.x + 100., sbar.frame.origin.y, sbar.frame.size.x - 100., sbar.frame.size.y);
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 would like to ask a basic iphone question. I have many TextFields in iPhone view, when I tap to input in a TextField, the Keyboard shows up and hide other TextField. I would like to make the parent view scrollable. Would you please show me the example code?
Thank you very much
You can listen for the keyboard up and down notification. and move your view just above height of keyboard.
In the ViewWillAppear method:
NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
[nc addObserver:self selector:#selector(keyboardWillShow:) name: UIKeyboardWillShowNotification object:nil];
[nc addObserver:self selector:#selector(keyboardWillHide:) name: UIKeyboardWillHideNotification object:nil];
In the ViewWillDisAppear method:
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];
And then have methods referred to above to adjust the position of the bar:
-(void) keyboardWillShow:(NSNotification *) note
{
CGRect r = bar.frame, t;
[[note.userInfo valueForKey:UIKeyboardBoundsUserInfoKey] getValue: &t];
r.origin.y -= t.size.height;
bar.frame = r;
}
-(void) keyboardWillHide:(NSNotification *) note
{
CGRect r = bar.frame, t;
[[note.userInfo valueForKey:UIKeyboardBoundsUserInfoKey] getValue: &t];
r.origin.y += t.size.height;
bar.frame = r;
}
This will give you an idea
How to make a UITextField move up when keyboard is present?
If the parentview is UIScrollView then try something like in textfield delegate
- (BOOL) textFieldShouldReturn:(UITextField *)theTextField
{
if (theTextField == textFieldName) {
[scroll scrollRectToVisible:CGRectMake(0, 160, 280, 440) animated:YES];//choose the rect accordingly.
}
return YES;
}
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.