如何像 UIActionSheet 一样从屏幕底部呈现 UIView？

Question

我希望 UIView 像 UIActionSheet 一样从屏幕底部向上滑动（并保持在屏幕中间）。我怎样才能做到这一点？

更新： 我正在使用以下代码：

TestView* test = [[TestView alloc] initWithNibName:@"TestView" bundle:nil];
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.4];
[UIView setAnimationCurve:UIViewAnimationCurveEaseIn];

test.view.center = CGPointMake(160,100);
//test.view.frame = CGRectMake(0, 0, 160, 210);
[[[UIApplication sharedApplication] keyWindow] addSubview:test.view];

[UIView commitAnimations];  

视图似乎是从角落动画并出现在角落里。我怎样才能让它从底部向上滑动？接近了！

Answer 1

做马特在这里所做的，但只是改变价值观和方向。如果您以后需要，我在家里有代码可以从底部执行此操作（我会更新这篇文章）。

链接：http://cocoawithlove.com/2009/05/intercepting-status-bar-touches-on.html

另外，不要忘记删除将主视图向下移动的代码（因此 UIView 会像 ActionSheet 一样从顶部弹出）

已更新代码：

这是我在我的一个应用中用来显示/隐藏一些“选项”视图的方法：

- (void)toggleOptions:(BOOL)ViewHidden
{
// this method opens/closes the player options view (which sets repeat interval, repeat & delay on/off)

if (ViewHidden == NO)
{
    // delay and move view out of superview
    CGRect optionsFrame = optionsController.view.frame;

    [UIView beginAnimations:nil context:nil];

    optionsFrame.origin.y += optionsFrame.size.height;
    optionsController.view.frame = optionsFrame;

    [UIView commitAnimations];

    [optionsController.view
     performSelector:@selector(removeFromSuperview)
     withObject:nil
     afterDelay:0.5];
    [optionsController
     performSelector:@selector(release)
     withObject:nil
     afterDelay:0.5];
    optionsController = nil;
}
else
{
    optionsController = [[PlayOptionsViewController alloc] init];

    //
    // Position the options at bottom of screen
    //
    CGRect optionsFrame = optionsController.view.frame;
    optionsFrame.origin.x = 0;
    optionsFrame.size.width = 320;
    optionsFrame.origin.y = 423;

    //
    // For the animation, move the view up by its own height.
    //
    optionsFrame.origin.y += optionsFrame.size.height;

    optionsController.view.frame = optionsFrame;
    [window addSubview:optionsController.view];

    [UIView beginAnimations:nil context:nil];

    optionsFrame.origin.y -= optionsFrame.size.height;
    optionsController.view.frame = optionsFrame;

    [UIView commitAnimations];
}
}

Answer 2

一种方法是在视图控制器上使用当前的模态视图控制器：

presentModalViewController:(UIViewController *)modalViewController animated:(BOOL)animated

欲了解更多信息，请查看UIViewController documentation。

编辑：如果您想要一个中间屏幕视图，您需要将其设置为@jtbandes 指出的位置。我建议还给 UIView 动画块添加一些糖果：

[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.4];
[UIView setAnimationCurve:UIViewAnimationCurveEaseIn];

myView.center = CGPointMake(x,y);

[UIView commitAnimations];

如果您需要全屏或关闭它，您可以再次移动它。

Answer 3

您必须自己移动视图，方法是设置其center 或frame。我会让你弄清楚将它们设置为什么。但是对于动画：

// set the view to its initial position here...

[UIView beginAnimations:nil context:NULL];
// move the view into place here...
[UIView commitAnimations];

Answer 4

查看这篇文章：http://blog.yetanotherjosh.com/post/33685102199/3-ways-to-do-a-vertical-transition-with

我将使用模态窗口方法。

Answer 5

试试这个解决方案....它有效

#pragma mark - Date Selector View PresentModelView with Transparent ViewController

- (void) showModal:(UIView*) modalView {

   CGRect  rect=modalView.frame;
   rect.origin=CGPointMake(0, 0);
   self.tutorialView.frame=rect;

    UIWindow *mainWindow = [(AppDelegate *)[UIApplication sharedApplication].delegate window];

    CGPoint middleCenter;


    middleCenter = CGPointMake(modalView.center.x, modalView.center.y);

    CGSize offSize = [UIScreen mainScreen].bounds.size;

    CGPoint offScreenCenter = CGPointMake(offSize.width / 2.0, offSize.height * 1.5);
    modalView.center = offScreenCenter;

    if ([[mainWindow subviews] containsObject:modalView]) {
        [modalView removeFromSuperview];
    }

    [mainWindow addSubview:modalView];

    [mainWindow bringSubviewToFront:modalView];
    // Show it with a transition effect
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.3];
    // animation duration in seconds
    modalView.center = middleCenter;
    [UIView commitAnimations];

}

// Use this to slide the semi-modal view back down.
- (void) hideModal:(UIView*) modalView {

    CGSize offSize = [UIScreen mainScreen].bounds.size;
    CGPoint offScreenCenter = CGPointMake(offSize.width / 2.0, offSize.height * 1.5);
    [UIView beginAnimations:nil context:(__bridge void *)(modalView)];
    [UIView setAnimationDuration:0.3];
    [UIView setAnimationDelegate:self];
    [UIView setAnimationDidStopSelector:@selector(hideModalEnded:finished:context:)];
    modalView.center = offScreenCenter;
    [UIView commitAnimations];

}

- (void) hideModalEnded:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context {

    UIView *modalView = (__bridge UIView *)context;
    [modalView removeFromSuperview];
}