转换UIKeyboardFrameEndUserInfoKey查看或窗口坐标(Convert UIK

2019-07-21 14:04发布

对于不断UIKeyboardFrameEndUserInfoKey ,在苹果的文档,它说:

这些坐标不考虑施加给车窗的内容的接口方向变化而产生的任何旋转因素。 因此,可能需要矩形转换为窗口坐标(使用convertRect:fromWindow:方法)或以查看坐标(使用convertRect:方法:fromView)使用它之前。

所以,如果我使用[view1 convertRect:rect fromView:view2]

我会插入什么上面的参数,以获得它的旋转值正确转换? 即:

厂景=? RECT =? (键盘框架我假设)视图2 =?

一直在努力了一些东西,得到一些有趣的东西。

Answer 1:

第一种观点应该是你的看法。 第二视图应该是零,这意味着窗口/屏幕坐标。 从而:

NSDictionary* d = [notification userInfo];
CGRect r = [d[UIKeyboardFrameEndUserInfoKey] CGRectValue];
r = [myView convertRect:r fromView:nil];

现在你有一个键盘将占据,在你看来方面的矩形。 如果您的视图是当前视图控制器的视图(或其子视图),旋转和现在等等都占了。



Answer 2:

我试图接受的答案,发现实际上它并不提供视图中的键盘的CGRect。 我发现,我已经到的CGRect从UIScreen对象到一个UIWindow对象转换,并从一个UIWindow对象UIView的对象:

NSValue * keyboardEndFrame;
CGRect    screenRect;
CGRect    windowRect;
CGRect    viewRect;

// determine's keyboard height
screenRect    = [[[notification userInfo] objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];
windowRect    = [self.view.window convertRect:screenRect fromWindow:nil];
viewRect      = [self.view        convertRect:windowRect fromView:nil];

我用上述调整大小根视图不是由键盘被隐藏:

NSTimeInterval  duration;
CGRect          frame;

// determine length of animation
duration  = [[[notification userInfo] objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];

// resize the view
frame              = self.view.frame;
frame.size.height -= viewRect.size.height;

// animate view resize with the keyboard movement
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationDuration:duration];
self.view.frame = frame;
[UIView commitAnimations];


Answer 3:

+ (void)parseKeyboardNotification:(NSNotification *)notification
                 inRelationToView:(UIView *)view
                             info:(void(^)(NSTimeInterval keyboardAnimationDuration, CGRect keyboardFrameInView, UIViewAnimationOptions keyboardAnimationOptions))callback
{
    NSParameterAssert(notification != nil);
    NSParameterAssert(view != nil);

    NSDictionary *userInfo = [notification userInfo];

    UIViewAnimationCurve animationCurve = [userInfo[UIKeyboardAnimationCurveUserInfoKey] integerValue];
    UIViewAnimationOptions animationOption = animationCurve << 16; // https://devforums.apple.com/message/878410#878410
    NSTimeInterval animationDuration = [userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue];

    // http://stackoverflow.com/a/16615391/202451
    CGRect screenRect    = [[userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];
    CGRect windowRect    = [view.window convertRect:screenRect fromWindow:nil];
    CGRect viewRect      = [view        convertRect:windowRect fromView:nil];

    callback(animationDuration, viewRect, animationOption);
}

可以这样使用

- (void)keyboardWillShowOrHide:(NSNotification *)notification
{    
    [AGKeyboardInfo parseKeyboardNotification:notification inRelationToView:self.view info:^(NSTimeInterval keyboardAnimationDuration, CGRect keyboardFrameInView, UIViewAnimationOptions keyboardAnimationOptions) {

        [UIView animateWithDuration:keyboardAnimationDuration delay:0 options:keyboardAnimationOptions animations:^{

             // do any modifications to your views

        } completion:nil];
    }];
}


文章来源: Convert UIKeyboardFrameEndUserInfoKey to View or Window Coordinates