[英]CABasicAnimation CGRect enlarging not working
I am trying to use a CABasicAnimation in order to make a view larger and then smaller, using the autoreverse. 我正在尝试使用CABasicAnimation,以便使用自动反转使视图变大然后变小。 I have QuartzCore imported. 我已经导入了QuartzCore。 I am using the code below: 我正在使用以下代码:
CABasicAnimation *enlarge = [CABasicAnimation animationWithKeyPath:@"enlargeKeyPath"];
CGRect currentSize = CGRectMake(20, 27, _moveView.bounds.size.width, _moveView.bounds.size.height);
CGRect newSize = CGRectMake(20, 27, 45, 46);
enlarge.fromValue = [NSValue valueWithCGRect:currentSize];
enlarge.toValue = [NSValue valueWithCGRect:newSize];
enlarge.autoreverses = YES;
enlarge.repeatCount = 3.0;
enlarge.duration = 0.5;
[_moveView.layer addAnimation:enlarge forKey:@"enlargeKeyPath"];
However, that code does not work. 但是,该代码不起作用。 Could someone help? 有人可以帮忙吗?
I feel like something is wrong with the keys for the animationWithKeyPath at the beginning and the forKey and the end. 我觉得animationWithKeyPath的开头和forKey和结尾的键有问题。 I don't know what those are used for. 我不知道这些是用来干什么的。 Could somebody help? 有人可以帮忙吗? Thanks! 谢谢!
Instead of "enlargeKeyPath", what we need here is actually transform.scale
; 代替“ enlargeKeyPath”,我们实际上需要的是transform.scale
; as a result, we would animate the scaling as follows: 结果,我们将对缩放进行动画处理,如下所示:
CABasicAnimation *enlarge = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
enlarge.toValue = [NSValue valueWithCATransform3D:CATransform3DMakeScale(3.0f, 3.0f, 1.0f)];
//To value is the value we wish your view to be scaled up (or down) to.
enlarge.autoreverses = YES;
enlarge.repeatCount = 3.0;
enlarge.duration = 0.5;
[_moveView.layer addAnimation:enlarge forKey:@"enlargeKeyPath"];
If you really would like to scale on the frame, we should use the keyPath bounds
instead of frame
as mentioned. 如果您真的想在框架上缩放,则应使用keyPath bounds
而不是如上所述的frame
。
Thus, your code would be: 因此,您的代码将是:
CABasicAnimation *enlarge = [CABasicAnimation animationWithKeyPath:@"bounds"];
CGRect currentSize = CGRectMake(20, 27, _moveView.bounds.size.width, _moveView.bounds.size.height);
CGRect newSize = CGRectMake(20, 27, 45, 46);
enlarge.toValue = [NSValue valueWithCGRect:newSize];
enlarge.autoreverses = YES;
enlarge.repeatCount = 3.0;
enlarge.duration = 0.5;
[_moveView.layer addAnimation:enlarge forKey:@"enlargeKeyPath"];
For other values of keyPath that you could use, please refer to the documentation here . 有关您可以使用的keyPath的其他值,请参阅此处的文档。
The following works for me: 以下对我有用:
CABasicAnimation *enlarge = [CABasicAnimation animationWithKeyPath:@"bounds.size"];
CGSize currentSize = _moveView.bounds.size;
CGSize newSize = CGSizeMake(_moveView.bounds.size.height * 1.5, _moveView.bounds.size.width * 1.5);
enlarge.fromValue = [NSValue valueWithCGSize:currentSize];
enlarge.toValue = [NSValue valueWithCGSize:newSize];
enlarge.autoreverses = YES;
enlarge.repeatCount = INFINITY;
enlarge.duration = 5.0;
[_moveView.layer addAnimation:enlarge forKey:@"enlargeKeyPath"];
The basic problem you're encountering is confusing the animated key path (the parameter to animationWithKeyPath:
) and the animation key (the parameter to addAnimation:forKey:
您遇到的基本问题是将动画关键点路径( animationWithKeyPath:
的参数)和动画关键点( addAnimation:forKey:
的参数) addAnimation:forKey:
animationWithKeyPath:
takes as a parameter the key path of an attribute of the view which will be animated. animationWithKeyPath:
将要设置动画的视图属性的关键路径作为参数。 To animate the bounds of a view you can use "bounds", likewise you could use "bounds.origin" or "bounds.size" 要为视图的边界设置动画,可以使用“ bounds”,同样可以使用“ bounds.origin”或“ bounds.size”
addAnimation:forKey:
takes as a parameter a key which allows you to identify this particular animation in the future. addAnimation:forKey:
使用一个键作为参数,该键可让您将来识别此特定动画。
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