iOS 7 iPad方向问题,当键盘出现在UITextField上时视图向上移动

时间:2015-01-30 12:36:37

标签: ios iphone ipad ios7 ios8

在我的应用程序中,我不想在UITextField上出现键盘后将ViewController的视图移动/动画到向上方向。

这必须支持所有orientation.i.e:
UIInterfaceOrientationPortrait
UIInterfaceOrientationPortraitUpsideDown
UIInterfaceOrientationLandscapeLeft
UIInterfaceOrientationLandscapeRight。

对于UIInterfaceOrientationPortrait,我的代码工作正常,如下所示: enter image description here

但对于UIInterfaceOrientationPortraitUpsideDown和UIInterfaceOrientationLandscapeLeft,它无法正常工作。请看下面的截图:

对于UIInterfaceOrientationLandscapeLeft视图向右侧移动而不是向上侧

enter image description here

对于UIInterfaceOrientationPortraitUpsideDown视图向下移动而不是向上移动

enter image description here

这只是iOS 7中的问题。我已经在iOS 8中检查了它,它运行正常。

我使用下面的代码在键盘外观上设置动画UIView:

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 = 264;
static const CGFloat LANDSCAPE_KEYBOARD_HEIGHT = 352;

    -(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);
        }

        if(self.view.frame.origin.y != 0.000000)
        {
            self.view.frame = CGRectMake(self.view.frame.origin.x,0.0,self.view.frame.size.width,self.view.frame.size.height);
        }

        CGRect viewFrame = self.view.frame;
        viewFrame.origin.y -= animatedDistance;

        NSLog(@"View frame y pos did start: %f ",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;

        NSLog(@"View frame y pos did end: %f ",animatedDistance);

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

        [self.view setFrame:viewFrame];

        [UIView commitAnimations];
    }

由于

1 个答案:

答案 0 :(得分:1)

杯。我可以提出一些建议吗?

首先,我会将事件附加到UIKeyboardWillShowNotificationUIKeyboardWillHideNotification,而不是使用textFieldDidBeginEditing事件。

假设我在iPad上运行了你的应用程序,但连接了蓝牙键盘。我会点击文本框,你的UIView会向上移动,但iPad不会显示屏幕键盘,因为它知道我不需要它。

另一个优点是您目前正在使用屏幕键盘的硬编码高度。哦,这不是一个好主意。

在这篇文章中查看我的屏幕截图,给出一个(只有一个!)示例,说明为什么这不是一个好主意:

iPad keyboard height

如果您选择沿着UIKeyboardWillShowNotification路线走,可以测量键盘的正确高度......

-(void)onKeyboardWillShow:(NSNotification*)notification
{
    //  The user has turned on the onscreen keyboard.
    //
    NSDictionary *info = [notification userInfo];
    NSValue *kbFrame = [info objectForKey:UIKeyboardFrameEndUserInfoKey];
    CGRect keyboardFrame = [kbFrame CGRectValue];
    keyboardFrame = [self.view convertRect:keyboardFrame fromView:nil];

    CGFloat keyboardHeight = keyboardFrame.size.height;
}

这是一个示例XCode项目,我已经敲了,它演示了如何调整控件的大小,使其(几乎)填满整个屏幕,并在设备的方向和放大时调整大小;屏幕键盘可见性更改:

OnScreenKeyboardTest XCode 6.1 project

你会发现它有一个&#34; Dismiss&#34;按钮,使屏幕键盘消失。这段代码(应该)可以在所有iPhone上运行。 ipad公司

enter image description here

P! 希望这会有所帮助。