keyboard hides textfield for different orientation

问题:

In my iPad application, I have few textView and textField's. When I click on textField, the keyboard covers the textField. So I am implementing the below code to move the textview up. But on rotation to portraitUpsideDown its not working fine. It slides the screen down in opposite direction. So how do I solve this problem??

-(void) animateTextField: (UITextView *) textField up: (BOOL) up
{
    int txtPosition = (textField.frame.origin.y - 540);
    const int movementDistance = (txtPosition < 0 ? 0 : txtPosition); // tweak as needed
    const float movementDuration = 0.3f; // tweak as needed

    int movement = (up ? -movementDistance : movementDistance);

    [UIView beginAnimations: @"anim" context: nil];
    [UIView setAnimationBeginsFromCurrentState: YES];
    [UIView setAnimationDuration: movementDuration];
    self.view.frame = CGRectOffset(self.view.frame, 0, movement);
    [UIView commitAnimations];
}

-(void)textViewDidBeginEditing:(UITextView *)textField
{
    [self animateTextField: textField up: YES];
}

-(void)textViewDidEndEditing:(UITextView *)textField
{
    [self animateTextField: textField up: NO];
}

-(BOOL)textFieldShouldReturn:(UITextView *)theTextField
{
    [theTextField resignFirstResponder];
    return YES;
}

回答1:

This solution is for iPhone, but it considers both orientations.

You can adapt a bit and voilá:

http://cocoawithlove.com/2008/10/sliding-uitextfields-around-to-avoid.html

回答2:

Crazy,

Just add another function:

- (void) animateTextView: (UITextView*) textView up: (BOOL) up
{
    const int movementDistance = 80; // tweak as needed
    const float movementDuration = 0.3f; // tweak as needed

    int movement = (up ? -movementDistance : movementDistance);

    [UIView beginAnimations: @"anim" context: nil];
    [UIView setAnimationBeginsFromCurrentState: YES];
    [UIView setAnimationDuration: movementDuration];
    self.view.frame = CGRectOffset(self.view.frame, 0, movement);
    [UIView commitAnimations];
}

Then call it like:

- (void)textViewDidBeginEditing:(UITextView *)textView {
    [self animateTextView: textView up: YES];
}

- (void)textViewDidEndEditing:(UITextView *)textView {
    [self animateTextView: textView up: NO];
}

回答3:

If your method like this.

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    // Return YES for supported orientations
    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}

Try this. I don't know exactly. But I am trying to help you. May be x and y coordinate cannot be changed in any orientation. so try this.

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
  {
     if(interfaceOrientation=UIInterfaceOrienationPotraitUpsideDown){
          //Declare txtPos globally...
          txtPos=(textField.frame.origin.y + 540);
      }
     if(interfaceOrientation=UIInterfaceOrienationPotrait)
      {
          txtPos=(textField.frame.origin.y - 540);
      }
    return(YES);
  }

in animate method. assign textPos to txtPosition variable..

回答4:

You should use keyboard will show and will hide notification to capture keyboard event and adjust your view accordingly.

- (void)dealloc {
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

- (void)viewDidLoad {
    [super viewDidLoad];

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardDidHideNotification object:nil];

}

- (void)keyboardWillShow:(NSNotification *)notification {
    CGRect keyboardFrame = [notification.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];
    CGFloat keyboardHeight = CGRectGetHeight(keyboardFrame);
    CGFloat animationDuration = [notification.userInfo[UIKeyboardAnimationDurationUserInfoKey] floatValue];
    UIViewAnimationCurve animationCurve = [notification.userInfo[UIKeyboardAnimationCurveUserInfoKey] integerValue];
    UIViewAnimationOptions animationOption = animationCurve << 16;

    [UIView animateWithDuration:animationDuration delay:0 options:animationOption animations:^{
        // adjust height using keyboardHeight
    } completion:^(BOOL finished) {

    }];
}

- (void)keyboardWillHide:(NSNotification *)notification {
    CGRect keyboardFrame = [notification.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];
    CGFloat keyboardHeight = CGRectGetHeight(keyboardFrame);
    CGFloat animationDuration = [notification.userInfo[UIKeyboardAnimationDurationUserInfoKey] floatValue];
    UIViewAnimationCurve animationCurve = [notification.userInfo[UIKeyboardAnimationCurveUserInfoKey] integerValue];
    UIViewAnimationOptions animationOption = animationCurve << 16;

    [UIView animateWithDuration:animationDuration delay:0 options:animationOption animations:^{
        // adjust height using keyboardHeight
    } completion:^(BOOL finished) {

    }];
}

This blog post explains this in detail

http://charlie.cu.cc/2015/10/solution-to-the-ios-software-keyboard-cover-part-of-the-ui/