从UIImageView的中心动画UIImageView

时间:2013-06-28 09:58:20

标签: iphone ios objective-c uiimageview uiviewanimation

我的UIImageView应该来自size (0,0) --> (93,75)

我有以下

  [UIView animateWithDuration:0.5 delay:0 options:UIViewAnimationOptionTransitionNone
                 animations:^{
                     imgButton.layer.anchorPoint = CGPointMake(imgButton.bounds.size.width/2, imgButton.bounds.size.height/2);
                     CGRect btnFrame = imgButton.frame;
                     btnFrame.size.width = 105;
                     btnFrame.size.height = 85;
                     imgButton.frame = btnFrame;
                 }
                 completion:^(BOOL finished) {
                     [self animageButton2:imgButton];
                 }];

这是有效的,但我唯一的问题是它不是从UIImageView的中心动画,而是从左上角动画。

有人知道吗?

4 个答案:

答案 0 :(得分:4)

我在Borrden的帮助下解决了这个问题。这就是我的解决方案。

首先创建一个imageview

UIImageView *imgLineup = [[UIImageView alloc]initWithFrame:CGRectMake(10, y, 93, 75)];
imgLineup.transform = CGAffineTransformScale(CGAffineTransformIdentity, 0.0, 0.0);

然后是以下内容。

[UIView animateWithDuration:0.5 delay:0 options:UIViewAnimationOptionCurveEaseInOut
                     animations:^{
                         imgButton.layer.anchorPoint = CGPointMake(0.5, 0.5);
                         imgButton.transform = CGAffineTransformScale(CGAffineTransformIdentity, 1.0, 1.0);

                     }
                     completion:^(BOOL finished) {
                        NSLog(@"done");
                     }];

答案 1 :(得分:2)

试试吧。导入#import <QuartzCore/QuartzCore.h>然后将uimageView添加到self.view

的子视图中
CABasicAnimation *zoomAnimation = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
[zoomAnimation setDuration:0.8];
[zoomAnimation setRepeatCount:1];
[zoomAnimation setFromValue:[NSNumber numberWithFloat:0.1]];
[zoomAnimation setToValue:[NSNumber numberWithFloat:1.0]];
[zoomAnimation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];
[[imageView layer] addAnimation:zoomAnimation forKey:@"zoom"];

答案 2 :(得分:0)

我的建议可能是一种破解,但它将是一种更容易实现你想要的方式:

  • 您将imageView的初始帧设置为:

    CGRectMake(center, center, 0, 0); 
    

    所以在你的情况下,它会更接近:

    CGRectMake(46, 37, 0, 0);
    
  • 然后使用类似这样的新rect进行动画处理:

    CGRectMake(0, 0,93,75); 
    

    你可以使用简单的UIViewAnimation;

        [UIView beginAnimations:@"zoom" context:NULL];
         [UIView setAnimationDuration:0.3];
        imageView.frame = CGRectMake(0, 0, 93, 75); ;
        [UIView commitAnimations];
    

希望它有效

答案 3 :(得分:0)

您要实现的是缩放变换,即将UIView大小设置为从大小(0,0)到大小(w,h)的动画。 CGAffineTransformMakeScale可以达到同样的效果。

最初,当您创建视图时,应用CGAffineTransformMakeScale(0.0,0.0),然后动画大小可扩展至CGAffineTransformMakeScale(1.0,1.0)

代码:

// Create the view and apply correct frame
UIView *tagView = [[UIView alloc] initWithFrame:CGRectMake(50, 100, 100, 100)];
tagView.tag = kTag;
//Apply scale transform, to make size(0,0) 
tagView.transform = CGAffineTransformMakeScale(0,0);
[self.view addSubview:tagView];

/// ............

UIView *tagView = [self.view viewWithTag:kTag];
//Now animate the view size scale up
[UIView animateWithDuration:0.5
        delay:0
        options:UIViewAnimationOptionCurveEaseOut
        animations:^{
                        tagView.transform = CGAffineTransformMakeScale(1.0,1.0);
                    }
        completion:NULL
 ];

此动画将根据需要围绕视图的中心点进行,因此无需使用anchorPointframe,这可能很棘手。详细了解this answerframeanchorPoint之间的关系。