Scrolling content hidden by keyboard. xcode 4.3.2 - scroll

Question

Using xcode 4.3.2. I hope this is the last time I have to beg for help.
I have a screen with 4 text fields. The bottom 2 are hidden by the keyboard when editing. I want to be able to scroll down so these 2 hidden fields can be edited. I have pasted my .m and .h files. something is not quite right.
Viewcontroller.h
#import <UIKit/UIKit.h>
#interface ViewController : UIViewController;
#property (strong, nonatomic) IBOutlet UIScrollView *scrollview;
#property (strong, nonatomic) IBOutlet UITextField *TextField1;
#property (strong, nonatomic) IBOutlet UITextField *TextField2;
#property (strong, nonatomic) IBOutlet UITextField *TextField3;
#property (strong, nonatomic) IBOutlet UITextField *TextField4;
#property (strong, nonatomic) IBOutlet UITextField *activefield;
- (IBAction)HideKeyBoard:(id)sender;
viewcontroler.m
#interface ViewController ()
#end
#implementation ViewController
#synthesize scrollview;
#synthesize TextField1;
#synthesize TextField2;
#synthesize TextField3;
#synthesize TextField4;
#synthesize activefield;
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
activefield = textField;
}
- (void)textFieldDidEndEditing:(UITextField *)textField
{
activefield = nil;
}
- (void)registerForKeyboardNotifications
{
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardWasShown:)
name:UIKeyboardDidShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(keyboardWillBeHidden:)
name:UIKeyboardWillHideNotification object:nil];
}
// Called when the UIKeyboardDidShowNotification is sent.
- (void)keyboardWasShown:(NSNotification*)aNotification
{
NSDictionary* info = [aNotification userInfo];
CGSize kbSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey]
CGRectValue].size;
UIEdgeInsets contentInsets = UIEdgeInsetsMake(0.0, 0.0, kbSize.height, 0.0);
scrollview.contentInset = contentInsets;
scrollview.scrollIndicatorInsets = contentInsets;
// If active text field is hidden by keyboard, scroll it so it's visible
// Your application might not need or want this behavior.
CGRect aRect = self.view.frame;
aRect.size.height -= kbSize.height;
if (!CGRectContainsPoint(aRect, activefield.frame.origin) ) {
CGPoint scrollPoint = CGPointMake(0.0,
activefield.frame.origin.y-kbSize.height);
[scrollview setContentOffset:scrollPoint animated:YES];
}
}
// Called when the UIKeyboardWillHideNotification is sent
- (void)keyboardWillBeHidden:(NSNotification*)aNotification
{
UIEdgeInsets contentInsets = UIEdgeInsetsZero;
scrollview.contentInset = contentInsets;
scrollview.scrollIndicatorInsets = contentInsets;
}
- (void)viewDidUnload
{
[self setScrollview:nil];
[self setActivefield:nil];
[self setTextField1:nil];
[self setTextField2:nil];
[self setTextField3:nil];
[self setTextField4:nil];
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}
- (IBAction)HideKeyBoard:(id)sender {
}
#end

Answer 1

Sliding UITextFields around to avoid the keyboard
I have faced this problem too. The link above really helped me. I hope that it will help you too
In the .h file you have to create a property like this
#property CGFloat animatedDistance;
then in the .m file you have to add this:
#synthesize animatedDistance;
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;
then you have to add this method:
- (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];
}
- (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];
}
- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
[textField resignFirstResponder];
return YES;
}
That's it. Good luck : )