使用 Three20 对超出表格范围的行/单元格重新排序时，表格视图不会滚动
当我在 Three20 TTTableViewController 中重新排序行/单元格（编辑表格并向上或向下移动单个单元格）时，它不会随着单元格移动到表格视图的边界之外而滚动。当我将单元格向上拖动超出边界时，它会自动将单元格动画向上并移出视图，而无需滚动它。这使得不可能有效地将单元重新排序到当前可见之外的位置。
我已经在使用和不使用 Three20 的情况下对此进行了测试，并且仅在使用 Three20 实现进行订购时不会滚动表格。
When I re-order rows/cells in my Three20 TTTableViewController (editing a table and moving individual cells up or down) it does not scroll with the cell being moved beyond the bounds of the tableview. When I do drag the cell up beyond the bounds it automatically animates the cell upwards and out of the view without scrolling with it. This makes it impossible to effectively re-order cells to positions outside of what is currently visible.
I have tested this with and without Three20 and it only doesn't scroll the table when ordering with the Three20 implementation.
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显然，Three20 的
TTTableView实现覆盖了UIScrollView的- (void)setContentSize:(CGSize)size;和
- (void)setContentOffset: (CGPoint)point;这些旨在防止 contentOffset 随着表格内容大小或高度的变化而错误地更改，尽管在编辑模式下移动行时它会无意中阻止表格滚动。
我注释掉了这些方法，我需要的功能就可用了。
Apparently Three20's
TTTableViewimplementation overridesUIScrollView's- (void)setContentSize:(CGSize)size;and
- (void)setContentOffset:(CGPoint)point;These are meant to prevent the contentOffset from being changed incorrectly with a change in content size or height of the table, although it inadvertently prevents the table from scrolling when moving rows in editing mode.
I commented out these methods and the functionality I needed became available.
Three20 喜欢使用 setContentOffset 和 setContentSize 方法覆盖来控制滚动行为。滚动行为由scrollEnabled 属性控制。
TTTableViews的scrollEnabled = YES，但当时这个方法被称为scrollEnabled = NO，并且在重新排序行时需要重置。
tableView.scrollEnabled = YES;
}
Three20 likes to control scrolling behavior with the setContentOffset and setContentSize method overrides. Scrolling behavior is controlled with a scrollEnabled property.
TTTableViews are scrollEnabled = YES, but at the time this method is called scrollEnabled = NO and needs to be reset when reordering rows.
tableView.scrollEnabled = YES;
}