0

当 iPad 虚拟键盘出现时，它覆盖了我的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？

4

3 回答 3

7

我已经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];
    }
}
于 2011-05-04T03:51:59.120 回答
1

我的建议是将你的对象放在一个 上UIScrollView，然后当键盘出现时，你就可以使用scrollRectToVisible:.

[scroller scrollRectToVisible:frame animated:YES];
于 2011-01-14T03:05:57.497 回答
1

当 up = NO 时，请务必将 ValayPatel 代码“if”语句更改if(animatedDis>0 || !up)为 for 条件，否则移动的视图始终位于先前位置。

于 2013-03-18T03:58:15.793 回答