Move up the textbox when keyboard appears in Objective C - ios

Question

I am very junior mobile programmer .I need to move up text views when keyboard appears.I follows this move-uiview-up-when-the-keyboard-appears-in-ios and it works well but I have a background image and I do not want to move up background image .so all textboxes are embed in UIView named as customView.I tried to move up customView instead of self.view .When I start enter in first textview, the customView moves up.But when I move to second textview,customview moves down to original position and textView become under the keyboard.customView need to stay move up the when i start enter in second textview .I really appreciate any help!.
#property (strong, nonatomic) IBOutlet UIView *customView;
-(BOOL)textFieldShouldBeginEditing:(UITextField *)textField {
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(keyboardDidShow:) name:UIKeyboardDidShowNotification object:nil];
return YES; }
- (BOOL)textFieldShouldEndEditing:(UITextField *)textField {
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(keyboardDidHide:) name:UIKeyboardDidHideNotification object:nil];
[self.view endEditing:YES];
return YES; }
- (void)keyboardDidShow:(NSNotification *)notification
{
//Assign new frame to your view
[self.customView setFrame:CGRectMake(0,50,320,460)];
}
-(void)keyboardDidHide:(NSNotification *)notification
{
[self.customView setFrame:CGRectMake(0,193,320,460)];
}

Answer 1

Add the observer in viewDidLoad for best approach.
- (void)viewDidLoad {
[super viewDidLoad];
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(keyboardWillShow:) name:UIKeyboardDidShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(keyboardWillBeHidden:) name:UIKeyboardWillHideNotification object:nil];
}
- (void)keyboardWillShow:(NSNotification*)aNotification {
[UIView animateWithDuration:0.25 animations:^
{
CGRect newFrame = [customView frame];
newFrame.origin.y -= 50; // tweak here to adjust the moving position
[customView setFrame:newFrame];
}completion:^(BOOL finished)
{
}];
}
- (void)keyboardWillBeHidden:(NSNotification*)aNotification {
[UIView animateWithDuration:0.25 animations:^
{
CGRect newFrame = [customView frame];
newFrame.origin.y += 50; // tweak here to adjust the moving position
[customView setFrame:newFrame];
}completion:^(BOOL finished)
{
}];
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
[self.view endEditing:YES];
}

Answer 2

// Add a scrollview on main view and add UITextField on that scrollview
-(void) viewDidLoad
{
UIScrollView *myScrollView = [[UIScrollView alloc] initWithFrame:[UIScreen mainScreen].bounds];
myScrollView.contentSize = CGSizeMake(320, 500);
myScrollView.contentInset = UIEdgeInsetsMake(0, 0, 60, 0);
[self.view addSubview:myScrollView];
UITextField *myTextField = [[UITextField alloc] initWithFrame:CGRectMake(20,30,100,33)];
[myScrollView addSubview:myTextField];
myTextField.delegate = self;
}
// Set the scrollview content offset to make the myTextField move up
- (void) textFieldDidBeginEditing:(UITextField *)textField
{
[myScrollView setContentOffset:CGPointMake(0,textField.center.y-80) animated:YES];
// here '80' can be any number which decide the height that textfiled should move
}
//To move the textfield to its original position
- (BOOL) textFieldShouldReturn:(UITextField *)textField
{
[[myScrollView setContentOffset:CGPointMake(0,0) animated:YES];
[textField resignFirstResponder];
return YES;
}

Answer 3

Make your class implement the UITextFieldDelegate.
Put the following code in viewDidLoad.
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(keyboardWasShown:) name:UIKeyboardDidShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(keyboardWillBeHidden:) name:UIKeyboardWillHideNotification object:nil];
And define the following functions in your .m file.
- (void)keyboardWasShown:(NSNotification *)aNotification
{// scroll to the text view
NSDictionary* info = [aNotification userInfo];
CGSize kbSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
UIEdgeInsets contentInsets = UIEdgeInsetsMake(0.0, 0.0, kbSize.height, 0.0);
self.scrollView.contentInset = contentInsets;
self.scrollView.scrollIndicatorInsets = contentInsets;
// If active text field is hidden by keyboard, scroll it so it's visible.
// Your app might not need or want this behavior.
CGRect aRect = self.view.frame;
aRect.size.height -= kbSize.height;
self.scrollView.scrollEnabled = YES;
if (!CGRectContainsPoint(aRect, activeField.frame.origin) ) {
[self.scrollView scrollRectToVisible:activeField.frame animated:YES];
}
}
- (void)keyboardWillBeHidden:(NSNotification *)aNotification
{
// scroll back..
UIEdgeInsets contentInsets = UIEdgeInsetsZero;
self.scrollView.contentInset = contentInsets;
self.scrollView.scrollIndicatorInsets = contentInsets;
self.scrollView.scrollEnabled = NO;
}
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
activeField = textField;
}
- (void)textFieldDidEndEditing:(UITextField *)textField
{
activeField = nil;
}