有没有什么方法可以改变UIScrollView的zoomToRect的持续时间？

- (void)zoomToRect:(CGRect)rect withDuration:(NSTimeInterval)duration {
    // 获取缩放比例
    CGFloat scale = self.bounds.size.width / rect.size.width;
    // 计算缩放后的 contentOffset
    CGPoint offset = CGPointMake(rect.origin.x * scale, rect.origin.y * scale);
    // 创建一个 CABasicAnimation 对象
    CABasicAnimation *zoomAnimation = [CABasicAnimation animationWithKeyPath:@"transform"];
    // 设置动画持续时间
    zoomAnimation.duration = duration;
    // 设置动画结束后保持最终状态
    zoomAnimation.removedOnCompletion = NO;
    zoomAnimation.fillMode = kCAFillModeForwards;
    // 设置缩放比例
    self.layer.transform = CATransform3DMakeScale(scale, scale, 1.0);
    // 设置 contentOffset
    self.contentOffset = offset;
    // 添加动画
    [self.layer addAnimation:zoomAnimation forKey:nil];
}

[self.scrollView zoomToRect:CGRectMake(0, 0, 200, 200) withDuration:0.5];