Cell动效： 点击按钮叉掉列表

2016-12-20 12:12:36.085 TheStep[4576:890087] *** Assertion failure in -[UITableView _endCellAnimationsWithContext:], /BuildRoot/Library/Caches/com.apple.xbs/Sources/UIKit_Sim/UIKit-3600.6.21/UITableView.m:1610
2016-12-20 12:12:36.094 TheStep[4576:890087] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid update: invalid number of rows in section 0.  The number of rows contained in an existing section after the update (25) must be equal to the number of rows contained in that section before the update (27), plus or minus the number of rows inserted or deleted from that section (0 inserted, 1 deleted) and plus or minus the number of rows moved into or out of that section (0 moved in, 0 moved out).'
*** First throw call stack:
(
    0   CoreFoundation                      0x0000000107f27d4b __exceptionPreprocess + 171

我把他下面的分割cell,
也删了一个。
就好了。

原因是？