iOS7中的UITableViewCell indexPath崩溃

Question

我有UITableViewCell一个UITableViewController.在我的手机有一个按钮,当你点击带你到另一个view用prepareforsegue.在prepareForSegue我这样做:

if ([[segue identifier] isEqualToString:@"MySegue"])
{
    UITableViewCell *cell = (UITableViewCell*) [[sender superview] superview];
    UITableView *table = (UITableView*)[[[sender superview] superview] superview];
    NSIndexPath *indexPath = [table indexPathForCell:cell]; 
}

好!一切都运作良好.但是现在我已经用iOS7升级了xCode,当我点击单元格中的按钮时,一个错误出现给我,我不知道如何解决它:

[UITableViewCell indexPathForCell:]: unrecognized selector sent to instance 0x9e160b0
2013-09-20 16:30:44.427 MyApp[8212:a0b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UITableViewCell indexPathForCell:]: unrecognized selector sent to instance 0x9e160b0'
*** First throw call stack:
(
    0   CoreFoundation                      0x024475e4 __exceptionPreprocess + 180
    1   libobjc.A.dylib                     0x01a5d8b6 objc_exception_throw + 44
    2   CoreFoundation                      0x024e4903 -[NSObject(NSObject) doesNotRecognizeSelector:] + 275
    3   CoreFoundation                      0x0243790b ___forwarding___ + 1019
    4   CoreFoundation                      0x024374ee _CF_forwarding_prep_0 + 14
    5   MyApp                              0x0004bc01 -[NewsTableViewController prepareForSegue:sender:] + 3441
    6   UIKit                               0x00af69cc -[UIStoryboardSegueTemplate _perform:] + 156
    7   UIKit                               0x00af6a59 -[UIStoryboardSegueTemplate perform:] + 115
    8   libobjc.A.dylib                     0x01a6f874 -[NSObject performSelector:withObject:withObject:] + 77
    9   UIKit                               0x005c4c8c -[UIApplication sendAction:to:from:forEvent:] + 108
    10  UIKit                               0x005c4c18 -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 61
    11  UIKit                               0x006bc6d9 -[UIControl sendAction:to:forEvent:] + 66
    12  UIKit                               0x006bca9c -[UIControl _sendActionsForEvents:withEvent:] + 577
    13  UIKit                               0x006bbd4b -[UIControl touchesEnded:withEvent:] + 641
    14  UIKit                               0x00936d7f _UIGestureRecognizerUpdate + 7166
    15  UIKit                               0x00601d4a -[UIWindow _sendGesturesForEvent:] + 1291
    16  UIKit                               0x00602c6a -[UIWindow sendEvent:] + 1030
    17  UIKit                               0x005d6a36 -[UIApplication sendEvent:] + 242
    18  UIKit                               0x005c0d9f _UIApplicationHandleEventQueue + 11421
    19  CoreFoundation                      0x023d08af __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15
    20  CoreFoundation                      0x023d023b __CFRunLoopDoSources0 + 235
    21  CoreFoundation                      0x023ed30e __CFRunLoopRun + 910
    22  CoreFoundation                      0x023ecb33 CFRunLoopRunSpecific + 467
    23  CoreFoundation                      0x023ec94b CFRunLoopRunInMode + 123
    24  GraphicsServices                    0x032c89d7 GSEventRunModal + 192
    25  GraphicsServices                    0x032c87fe GSEventRun + 104
    26  UIKit                               0x005c394b UIApplicationMain + 1225
    27  MyApp                              0x00002cfb main + 235
    28  libdyld.dylib                       0x01f42725 start + 0
    29  ???                                 0x00000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException

应用程序崩溃的行是这样的:

    NSIndexPath *indexPath = [table indexPathForCell:cell]; }

Answer 1

在iOS7中UITableViewWrapperView是超级视图UITableViewCell,这意味着另一个超级视图:

IOS 7:

UITableView *tableView = (UITableView *)cell.superview.superview;

iOS6" 的

UITableView *tableView = (UITableView *)cell.superview;

你可以在这里找到另一个变化:

似乎你的代码:UITableView table =(UITableView)[[[sender superview] superview] superview]; 返回UITableViewCell不是a UITableView.

试试以下内容:

UITableView *table = (UITableView*)[[[[[sender superview] superview] superview] superview] superview];

Answer 2

Apple在iOS 7中更改了UITableViewCell层次结构

使用iOS 6.1 SDK

<UITableViewCell>
   | <UITableViewCellContentView>
   |    | <UILabel>

使用iOS 7 SDK

<UITableViewCell>
   | <UITableViewCellScrollView>
   |    | <UITableViewCellContentView>
   |    |    | <UILabel>

因此,如果您想在按钮索引处获取indexpath,请使用以下代码使用iOS 6或更高版本的SDK

UITableViewCell *clickedCell = (UITableViewCell *)[[sender superview] superview];
    NSIndexPath *clickedButtonPath = [book_table indexPathForCell:clickedCell];
    NSLog(@"index=%@",clickedButtonPath);

使用iOS 7或7+ SDK

UITableViewCell *clickedCell = (UITableViewCell *)[[[sender superview] superview]superview];
    NSIndexPath *clickedButtonPath = [book_table indexPathForCell:clickedCell];
    NSLog(@"index=%ld",(long)clickedButtonPath.item);