Question

我想翻转一个imageView（左/右），但我找不到UIView（或UIImageView）方法来做到这一点？任何想法？

谢谢！

Answer 1

我认为你唯一想要的是：

的UIView的

+ (void)setAnimationTransition:(UIViewAnimationTransition)transition forView:(UIView *)view cache:(BOOL)cache;

和

UIViewAnimationTransitionFlipFromLeft,
UIViewAnimationTransitionFlipFromRight,

这些动画过渡只能在动画块中使用。在容器视图上设置转换，然后换出旧视图以用于新视图，然后提交动画。

像：

CGContextRef context = UIGraphicsGetCurrentContext();

[UIView beginAnimations:nil context:context];
[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromLeft forView:yourContainerView cache:YES];
[yourContainerView exchangeSubviewAtIndex:0 withSubviewAtIndex:1];
[UIView commitAnimations];

Answer 2

将您的UIIMageView放入UIView并使用此代码（来自实用程序app项目示例）

- (void)loadFlipsideViewController {

    FlipsideViewController *viewController = [[FlipsideViewController alloc] initWithNibName:@"FlipsideView" bundle:nil];
    self.flipsideViewController = viewController;
    [viewController release];

    // Set up the navigation bar
    UINavigationBar *aNavigationBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0.0, 0.0, 320.0, 44.0)];
    aNavigationBar.barStyle = UIBarStyleBlackOpaque;
    self.flipsideNavigationBar = aNavigationBar;
    [aNavigationBar release];

    UIBarButtonItem *buttonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(toggleView)];
    UINavigationItem *navigationItem = [[UINavigationItem alloc] initWithTitle:@"Test123"];
    navigationItem.rightBarButtonItem = buttonItem;
    [flipsideNavigationBar pushNavigationItem:navigationItem animated:NO];
    [navigationItem release];
    [buttonItem release];
}


- (IBAction)toggleView {    
    /*
     This method is called when the info or Done button is pressed.
     It flips the displayed view from the main view to the flipside view and vice-versa.
     */
    if (flipsideViewController == nil) {
        [self loadFlipsideViewController];
    }

    UIView *mainView = mainViewController.view;
    UIView *flipsideView = flipsideViewController.view;

    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:1];
    [UIView setAnimationTransition:([mainView superview] ? UIViewAnimationTransitionFlipFromRight : UIViewAnimationTransitionFlipFromLeft) forView:self.view cache:YES];

    if ([mainView superview] != nil) {
        [flipsideViewController viewWillAppear:YES];
        [mainViewController viewWillDisappear:YES];
        [mainView removeFromSuperview];
        [infoButton removeFromSuperview];
        [self.view addSubview:flipsideView];
        [self.view insertSubview:flipsideNavigationBar aboveSubview:flipsideView];
        [mainViewController viewDidDisappear:YES];
        [flipsideViewController viewDidAppear:YES];

    } else {
        [mainViewController viewWillAppear:YES];
        [flipsideViewController viewWillDisappear:YES];
        [flipsideView removeFromSuperview];
        [flipsideNavigationBar removeFromSuperview];
        [self.view addSubview:mainView];
        [self.view insertSubview:infoButton aboveSubview:mainViewController.view];
        [flipsideViewController viewDidDisappear:YES];
        [mainViewController viewDidAppear:YES];
    }
    [UIView commitAnimations];
}

Answer 3

mainView和flipToView是imageViews的对象，而containerView是UIView的对象。

下面给出了两个示例代码，用于卷曲imageView并将ImageView从左向右翻转

- (void)curlAction:(id)sender
{
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:0.75];

    [UIView setAnimationTransition:([mainView superview] ?                          UIViewAnimationTransitionCurlUp : UIViewAnimationTransitionCurlDown)forView:containerView cache:YES];
    if ([flipToView superview])
    {
        [flipToView removeFromSuperview];
        [containerView addSubview:mainView];
    }
    else
    {
        [mainView removeFromSuperview];
        [containerView addSubview:flipToView];
    }

    [UIView commitAnimations];
}

并将图像从左向右移动到这里是代码

- (void)flipAction:(id)sender
{
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:0.75];

    [UIView setAnimationTransition:([mainView superview] ?
                                        UIViewAnimationTransitionFlipFromLeft : UIViewAnimationTransitionFlipFromRight)
                                        forView:containerView cache:YES];
    if ([flipToView superview])
    {
        [flipToView removeFromSuperview];
        [containerView addSubview:mainView];
    }
    else
    {
        [mainView removeFromSuperview];
        [containerView addSubview:flipToView];
    }

    [UIView commitAnimations];
}

感谢＆amp;问候

Answer 4

另一个解决方案可以在repo找到，但它不涉及动画！它仅操纵图像方向以提供一些图像效果，即垂直/水平翻转并向左/向右旋转90度。

对于iphone开发，如何翻转UIImageView？

4 个答案: