不确定是否有人看过这个开源:https://github.com/Ramotion/folding-cell ，但我正在尝试使用带有表格 View 单元格的弹跳动画来完成折叠/展开，就像上面链接中显示的那样。目前我正在更改单元格的高度并执行 tableView.beginUpdates() 和 tableView.endUpdates()。但结果不是很好。我还尝试更改单元格 subview 的顶部约束。这确实提供了更好的动画，但由于单元格的高度保持不变，因此此方法不会使单元格反弹。任何人都知道如何完成这种类型的动画？
即使这个问题的答案迟到了。让这对任何新观众都有帮助，这是一个带有淡入淡出和反弹的漂亮动画。
将此代码添加到 UITableViewDelegate
的tableView willDisplayCell 方法中
objective-C
cell.transform = CGAffineTransformMakeTranslation(0, cell.frame.size.height);
cell.alpha = 0;
[UIView animateWithDuration:0.4 delay:0.03 * indexPath.row
usingSpringWithDamping:0.8 initialSpringVelocity:0.1
options:UIViewAnimationOptionCurveEaseInOut animations:^{
cell.alpha = 1;
cell.transform = CGAffineTransformMakeTranslation(0, 0);
} completion:nil];
Swift 版本
cell.transform = CGAffineTransform(translationX: 0, y: rowHeight)
cell.alpha = 0
UIView.animate(
withDuration: 0.4,
delay: 0.03 * Double(indexPath.row),
usingSpringWithDamping: 0.8,
initialSpringVelocity: 0.1,
options: [.curveEaseInOut],
animations: {
cell.alpha = 1
cell.transform = CGAffineTransform(translationX: 0, y: 0)
})
我还添加了淡入淡出效果，如果不需要，请删除动画中包含的 alpha 部分。
The delay calculation makes sure each cell at each row has a different delay, this makes the animation more viewable at the lower portions of the tableview. Setting a higher delay value would make it profound at the topmost cells also.
SpringWithDamping - essentially a bouncing power. Use value of 1 for no bouncing at all and values closer to 0 to increase oscillation.
SpringVelocity - Value of 1 corresponds to the total animation distance travelled within a second.
options - options for animating views. We are using curveEaseInOut to cause the animation to begin slowly, accelerate through the middle of it's duration, and then slow again before completing.
关于ios - 使用表格 View 单元格折叠和弹跳动画，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/37800745/
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