Ios 为UISegmentedControl图像设置动画

我正在尝试在UISegmentedControl中设置图像动画。这是我想到的，但它不起作用

如果在最后一行代码中将imageView.layer切换到_segmentedControl.layer，动画本身工作正常

我错过了什么

        UIImageView *imageView = [[UIImageView alloc] init];
        imageView.image = [_segmentedControl imageForSegmentAtIndex:0];
        CABasicAnimation *scale = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
        scale.duration = 0.25;
        scale.repeatCount = 2;
        scale.autoreverses = YES;
        scale.fromValue = [NSNumber numberWithFloat:1.0];
        scale.toValue = [NSNumber numberWithFloat:0.0];
        [imageView.layer addAnimation:scale forKey:@"scale"];

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您可以使用集合视图。UISegmentedControl无法设置动画

，仅供将来参考。我想与大家分享我提出的解决方案。您至少可以为分段控件的子视图设置动画，而不是为分段的图像设置动画（这似乎是不可能的）

        UIView *subView = [[_segmentedControl subviews] objectAtIndex:0];
        CABasicAnimation *scale = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
        scale.duration = 0.25;
        scale.repeatCount = 1;
        scale.autoreverses = YES;
        scale.fromValue = [NSNumber numberWithFloat:1.0];
        scale.toValue = [NSNumber numberWithFloat:0.95];
        [subView.layer addAnimation:scale forKey:@"scale"];