ios8.0TableView自动计算cell高度

设置一个缓存高度的字典

@property (nonatomic, strong) NSMutableDictionary *heightAtIndexPath;//缓存高度
 

实行懒加载

 
 
pragma mark - Getters
 
 
 
  
(NSMutableDictionary *)heightAtIndexPath
 {
 if (!_heightAtIndexPath) {
 _heightAtIndexPath = [NSMutableDictionary dictionary];
 }
 return _heightAtIndexPath;
 }
 

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

 
 
 
  
 
(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];
 
 
 
 
 
}
 

下面方法给一个预算高度

#pragma mark - UITableViewDelegate
 -(CGFloat)tableView:(UITableView *)tableView estimatedHeightForRowAtIndexPath:(NSIndexPath *)indexPath
 {
 NSNumber *height = [self.heightAtIndexPath objectForKey:indexPath];
 if(height)
 {
 return height.floatValue;
 }
 else
 {
 return 100;
 }
 }
 

在willdisplay方法里把计算的高度缓存一下

 
 
 
  
 
(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;
 }];
 
 
 
 
 
}
 

如果要进行数据的刷新 请把heightAtIndexPath清空，重新计算高度