Question

我有这个功能，用于在键盘弹出时在页面上滚动textFields，但它不适用于横向模式。它仍然朝着iphone的顶部滚动（耳机的位置，如果这是有道理的。所以看起来它在横向模式下滚动到侧面）在横向模式下而不是滚动它应该。如何修改此功能以使其正确滚动并且仅在横向模式下滚动？我不需要它在纵向模式下滚动。谢谢！

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;

- (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
{
    NSLog(@"LANDSCAPE");
    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];
}

Answer 1

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 LANDSCAPE_KEYBOARD_HEIGHT = 162;

- (void)textFieldDidBeginEditing:(UITextField *)textField
{
UIInterfaceOrientation orientation =
[[UIApplication sharedApplication] statusBarOrientation];

if (orientation == UIInterfaceOrientationLandscapeLeft || 
    orientation == UIInterfaceOrientationLandscapeRight) 
{

    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;
    }

    animatedDistance = floor(LANDSCAPE_KEYBOARD_HEIGHT * heightFraction);

    CGRect viewFrame = self.view.frame;

    if (orientation == UIInterfaceOrientationLandscapeLeft) 
    {
        viewFrame.origin.x -= animatedDistance;
    }
    if (orientation == UIInterfaceOrientationLandscapeRight) 
    {
        viewFrame.origin.x += animatedDistance;
    }

    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationBeginsFromCurrentState:YES];
    [UIView setAnimationDuration:KEYBOARD_ANIMATION_DURATION];

    [self.view setFrame:viewFrame];
    [UIView commitAnimations];
}
}
// scrolls the view down if the view was scrolled up 
- (void)textFieldDidEndEditing:(UITextField *)textField
{
UIInterfaceOrientation orientation =
[[UIApplication sharedApplication] statusBarOrientation];

if (orientation == UIInterfaceOrientationLandscapeLeft || 
    orientation == UIInterfaceOrientationLandscapeRight) 
{
    CGRect viewFrame = self.view.frame;

    if (orientation == UIInterfaceOrientationLandscapeLeft) 
    {
        viewFrame.origin.x += animatedDistance;
    }
    if (orientation == UIInterfaceOrientationLandscapeRight) 
    {
        viewFrame.origin.x -= animatedDistance;
    }

    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationBeginsFromCurrentState:YES];
    [UIView setAnimationDuration:KEYBOARD_ANIMATION_DURATION];

    [self.view setFrame:viewFrame];
    [UIView commitAnimations];
}
}

iphone横向模式滚动textField

1 个答案: