切换VC的时候内存溢出崩溃

 在ios8.1.2上跑APP在两个VC中相互切换,崩溃信息，引起这个崩溃的原因有可能是由于视图返回消失，但是tableview的某些动画执行时间还未结束还在对其发送信息导致的

0	libobjc.A.dylib	0x0000000197cdfbd0	objc_msgSend (scrollViewDidScroll:) + 16
1	UIKit	0x000000018aa90b9c	-[UIScrollView setContentOffset:] + 500
2	UIKit	0x000000018ab46880	-[UITableView setContentOffset:] + 300
3	Foundation	0x0000000186ecd620	__NSSetPointValueAndNotify + 152
4	UIKit	0x000000018ad54634	-[UIScrollView(UIScrollViewInternal) _adjustContentOffsetIfNecessary] + 864
5	UIKit	0x000000018ab4cb64	-[UIScrollView(UIScrollViewInternal) _stopScrollingNotify:pin:tramplingDragFlags:] + 400
6	UIKit	0x000000018ab4c98c	-[UIScrollView removeFromSuperview] + 44
7	UIKit	0x000000018aa71a08	-[UIView dealloc] + 440
8	libobjc.A.dylib	0x0000000197ce5724	(anonymous namespace)::AutoreleasePoolPage::pop(void*) + 564
9	CoreFoundation	0x0000000185ed8d14	_CFAutoreleasePoolPop + 24
10	CoreFoundation	0x0000000185fad5f4	___CFRunLoopRun + 1500
11	CoreFoundation	0x0000000185ed8f74	CFRunLoopRunSpecific + 392
12	GraphicsServices	0x000000018f9336fc	GSEventRunModal + 156
13	UIKit	0x000000018aadad94	UIApplicationMain + 1484
14	O2O	0x000000010014a9b8	main (main.m:14)
15	libdyld.dylib	0x0000000198376a08	_start + 4

//在dealloc中对tableview的delegate dataSource置空
- (void)dealloc
{
    self.tableView.delegate = nil;
    self.tableView.dataSource = nil;
}