iPad 上出现键盘时如何向上移动视图？

Question

当 iPad 虚拟键盘出现时，它会覆盖我视图中的一些文本字段。有没有办法在键盘出现时将 ViewController 向上移动？

Answer 1

我为我的一个应用程序编写了这段代码。

它会自动检测 TextField 的位置并相应地滚动 baseView。

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


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



- (void) animateTextField: (UITextField*) textField up: (BOOL) up
{
    CGPoint temp = [textField.superview convertPoint:textField.frame.origin toView:nil];
    UIInterfaceOrientation orientation =
    [[UIApplication sharedApplication] statusBarOrientation];
    if (orientation == UIInterfaceOrientationPortrait){

        if(up) {
            int moveUpValue = temp.y+textField.frame.size.height;
            animatedDis = 264-(1024-moveUpValue-5);
        }
    }
    else if(orientation == UIInterfaceOrientationPortraitUpsideDown) {
        if(up) {
            int moveUpValue = 1004-temp.y+textField.frame.size.height;
            animatedDis = 264-(1004-moveUpValue-5);
        }
    }
    else if(orientation == UIInterfaceOrientationLandscapeLeft) {
        if(up) {
            int moveUpValue = temp.x+textField.frame.size.height;
            animatedDis = 352-(768-moveUpValue-5);
        }
    }
    else
    {
        if(up) {
            int moveUpValue = 768-temp.x+textField.frame.size.height;
            animatedDis = 352-(768-moveUpValue-5);
        }

    }
    if(animatedDis>0)
    {
        const int movementDistance = animatedDis;
        const float movementDuration = 0.3f; 
        int movement = (up ? -movementDistance : movementDistance);
        [UIView beginAnimations: nil context: nil];
        [UIView setAnimationBeginsFromCurrentState: YES];
        [UIView setAnimationDuration: movementDuration];
        if (orientation == UIInterfaceOrientationPortrait){
            baseViewController.view.frame = CGRectOffset(baseViewController.view.frame, 0, movement);       
        }
        else if(orientation == UIInterfaceOrientationPortraitUpsideDown) {

            baseViewController.view.frame = CGRectOffset(baseViewController.view.frame, 0, movement);
        }
        else if(orientation == UIInterfaceOrientationLandscapeLeft) {

            baseViewController.view.frame = CGRectOffset(baseViewController.view.frame, 0, movement);
        }
        else {
            baseViewController.view.frame = CGRectOffset(baseViewController.view.frame, 0, movement);
        }

        [UIView commitAnimations];
    }
}

Answer 2

我的建议是将您的对象放置在 UIScrollView 上，然后当键盘出现时，您可以使用 scrollRectToVisible:。

[scroller scrollRectToVisible:frame animated:YES];

Answer 3

当 up = NO 时，请将 ValayPatel 代码“if”语句更改为 if(animatedDis>0 || !up)，否则移动的视图始终位于之前的位置。