设置一个缓存高度的字典
<pre>@property (nonatomic, strong) NSMutableDictionary *heightAtIndexPath;//缓存高度
</pre>
实行懒加载
<pre>
pragma mark - Getters
- (NSMutableDictionary *)heightAtIndexPath
{
if (!_heightAtIndexPath) {
_heightAtIndexPath = [NSMutableDictionary dictionary];
}
return _heightAtIndexPath;
}
</pre>
如果想要移除plain下面多出来的分割线
请在这个方法里执行
<pre>
-
(void)viewDidLoad
{
[super viewDidLoad];
//如果想去除plain下面多出来的分割线
//那么就self.tableView.tableFooterView = [[UIView alloc] initWithFrame:CGRectZero];
}
</pre>
下面方法给一个预算高度
<pre>#pragma mark - UITableViewDelegate
-(CGFloat)tableView:(UITableView *)tableView estimatedHeightForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSNumber *height = [self.heightAtIndexPath objectForKey:indexPath];
if(height)
{
return height.floatValue;
}
else
{
return 100;
}
}
</pre>
在willdisplay方法里把计算的高度缓存一下
<pre>
-
(void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
{
NSNumber *height = @(cell.frame.size.height);
[self.heightAtIndexPath setObject:height forKey:indexPath];/此处做了个简单的动画效果/
NSArray * array = tableView.indexPathsForVisibleRows;
NSIndexPath * firstIndexPath = array [0];
cell.layer.anchorPoint = CGPointMake(0, 0.5);
cell.layer.position = CGPointMake(cell.layer.position.x, cell.layer.position.y);
if (firstIndexPath.row < indexPath.row) {
cell.layer.transform = CATransform3DMakeRotation(M_PI_2, 0, 0, 0.5);
}else {
cell.layer.transform = CATransform3DMakeRotation(-M_PI_2, 0, 0, 1.0);
}
cell.alpha = 0;
[UIView animateWithDuration:1.0 animations:^{
cell.layer.transform = CATransform3DIdentity;
cell.alpha = 1.0;
}];
}
</pre>
