UIAnimation -显示UIView从UIView的按钮。

Question

我的视野中有一个UIButton。在按钮的触摸事件中，我会出现一个UIView。我使用的UIAnimation使视图从窗口顶部出现。但我希望它能出现在。触摸按钮之前，视图是不可见的。在触摸按钮时，视图应该从上面的位置开始出现。

以下是代码：

-(IBAction) ShowInfowView:(id)sender{

    CGRect rect = viewInfo.frame;

    rect.origin.y = rect.size.height - rect.size.height+58.0;
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.70];
    [UIView setAnimationDelay:0.0];
    [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];

    viewInfo.frame = rect;

    [UIView commitAnimations];

}

这就是我如何再一次隐藏观点：

-(IBAction) HideInfoView:(id)sender{

    CGRect rect = viewInfo.frame;

    rect.origin.y = -rect.size.height;
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.70];
    [UIView setAnimationDelay:0.0];
    [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];

    viewInfo.frame = rect;

    [UIView commitAnimations];

}

在viewDidLoad中，我执行以下操作：

CGRect rect = viewInfo.frame;
rect.origin.y = -rect.size.height;
viewInfo.frame = rect;  

更新：

请参阅这示例。这里的视图从屏幕顶部出现。我想要它出现在按钮y轴。关于那件事，请考虑一下y键的位置。

Answer 1

所以你想要一个幻灯片效果，但不是从屏幕的顶部，只是一些任意的值？

一种方法是：

1)在动画完成后，您应该创建一个具有所需视图的尺寸和位置的视图，我们将称之为call视图。

2)将基视图属性clipsToBounds设置为YES。这将使基视图框架之外的所有子视图不可见。

3)将动画视图添加为基视图的子视图，但将框架设置为不可见(通过将其设置在基视图之上)：

frame = CGRectMake(0, -AnimViewHeight, AnimViewWidth, AnimViewHeight);

4)动画化动画框架：

//put this inside of an animation block
AnimView.frame = CGRectMake(0, 0, AnimViewWidth, AnimViewHeight);

编辑：

示例：

//define the tags so we can easily access the views later
#define BASEVIEW_TAG 100
#define INFOVIEW_TAG 101

- (void) showInfo
{
        //replace the following lines with preparing your real info view
        UIView * infoView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
        [infoView setBackgroundColor: [UIColor yellowColor]];
        [infoView setTag: INFOVIEW_TAG];

        //this is the frame of the info view AFTER the animation finishes (again, replace with real values)
        CGRect targetframe = CGRectMake(100, 100, 100, 100);

        //create an invisible baseview
        UIView * baseview = [[UIView alloc] initWithFrame:targetframe];
        [baseview setBackgroundColor: [UIColor clearColor]];
        [baseview setClipsToBounds: YES]; //so it cuts everything outside of its bounds
        [baseview setTag: BASEVIEW_TAG];

        //add the nfoview to the baseview, and set it above the bounds frame
        [baseview addSubview: infoView];
        [infoView setFrame:CGRectMake(0, -infoView.bounds.size.height,
                                      infoView.bounds.size.width, infoView.bounds.size.height)];

        //add the baseview to the main view
        [self.view addSubview: baseview];

        //slide the view in
        [UIView animateWithDuration: 1.0 animations:^{
            [infoView setFrame: baseview.bounds];
        }];

        //if not using ARC, release the views
        [infoview release];
        [baseview release];
}

- (void) hideinfo
{
        //get the views
        UIView * baseView = [self.view viewWithTag: BASEVIEW_TAG];
        UIView * infoView = [baseView viewWithTag: INFOVIEW_TAG];

        //target frame for infoview - slide up
        CGRect out_frame = CGRectMake(0, -infoView.bounds.size.height,
                                      infoView.bounds.size.width, infoView.bounds.size.height);

        //animate slide out
        [UIView animateWithDuration:1.0
                         animations:^{
                             [infoView setFrame: out_frame];
                         } completion:^(BOOL finished) {
                             [baseView removeFromSuperview];
                         }];
    }

Answer 2

我已经做了你在我最近的项目中尝试过的事情。应该通过以下步骤来完成这项工作: 1.在您的viewDidLoad:中，您可以像下面这样插入viewToFadeIn：

viewToFadeIn = [[UIView alloc] initWithFrame:CGRectMake(20,self.view.frame.size.height+10, self.view.frame.size.widh-40, 200)]; 

//its important to initalize it outside your view
//your customization of this view
[self.view addSubview:viewToFadeIn];

2.您的ShowInfowView:方法应该如下所示：

` -(IBAction) ShowInfowView：(Id)发件人{

[UIView beginAnimations:@"fadeIn" context:NULL];
[UIView setAnimationDuration:0.25]; 
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:@selector(animationFinished:finished:context:)];
viewToFadeIn.transform = CGAffineTransformMakeTranslation(0, -290);
//290 is in my case, try a little for your correct value
[UIView commitAnimations];

}3.yourHideInfoView：‘方法如下所示

-(IBAction) HideInfoView:(id)sender{
[UIView beginAnimations:@"fadeOut" context:NULL];
[UIView setAnimationDuration:0.25]; 
[UIView setAnimationDelegate:self];
viewToFadeIn.transform = CGAffineTransformMakeTranslation(0, 0);
[UIView commitAnimations];
}

编辑: 4. animationFinishedMethod:

- (void)animationFinished:(NSString *)animationID finished:(BOOL)finished context:(void *)context{ 
   if ([animationID isEqual:@"fadeIn"]) { 
      //Do stuff 
   } 
   if ([animationID isEqual:@"fadeOut"]) { 
      //Do stuff 
   } 
}

请参阅这

这应该能起作用。祝好运

Answer 3

你的问题(对我来说)不清楚。这是什么？

rect.origin.y = rect.size.height - rect.size.height+58.0;

58是你UIButton的来源吗？

您应该使用sender.frame等

使用块来像这样动画

[UIView animateWithDuration:0.5f animations:^{
    // Animation here
} completion:^(BOOL finished) {
    // onComplete
}];