问题
I've a UITableViewCell in a UITableViewController.
In my cell there is a button that when you click takes you to another view with a prepareforsegue.
In prepareForSegue I do this:
if ([[segue identifier] isEqualToString:@"MySegue"])
{
UITableViewCell *cell = (UITableViewCell*) [[sender superview] superview];
UITableView *table = (UITableView*)[[[sender superview] superview] superview];
NSIndexPath *indexPath = [table indexPathForCell:cell];
}
Ok! Everything has always worked well. But now that I've upgraded xCode with iOS7, when I click on the button located in the cell, an error presents itself to me, and I don't know how to solve it:
[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
The line where the app crashes is this:
NSIndexPath *indexPath = [table indexPathForCell:cell]; }
回答1:
In iOS7 UITableViewWrapperView is the superview of UITableViewCell, which means another superview for you:
iOS7:
UITableView *tableView = (UITableView *)cell.superview.superview;
iOS6"
UITableView *tableView = (UITableView *)cell.superview;
Another change you can find it here:
seems your code: UITableView table = (UITableView)[[[sender superview] superview] superview]; returns a UITableViewCell not a UITableView.
Try the below:
UITableView *table = (UITableView*)[[[[[sender superview] superview] superview] superview] superview];
回答2:
Apple change the UITableViewCell hierarchy in iOS 7
Using iOS 6.1 SDK
<UITableViewCell>
| <UITableViewCellContentView>
| | <UILabel>
Using iOS 7 SDK
<UITableViewCell>
| <UITableViewCellScrollView>
| | <UITableViewCellContentView>
| | | <UILabel>
So if you want to get indexpath at button index then use following code Using iOS 6 or later SDK
UITableViewCell *clickedCell = (UITableViewCell *)[[sender superview] superview];
NSIndexPath *clickedButtonPath = [book_table indexPathForCell:clickedCell];
NSLog(@"index=%@",clickedButtonPath);
Using iOS 7 or 7+ SDK
UITableViewCell *clickedCell = (UITableViewCell *)[[[sender superview] superview]superview];
NSIndexPath *clickedButtonPath = [book_table indexPathForCell:clickedCell];
NSLog(@"index=%ld",(long)clickedButtonPath.item);
回答3:
It works for sure, but how super can we get?
回答4:
I had similar problem where I had to find the textFileds value from TableView
if ([Util isiOSVerGreaterThen7]) { // iOS 7
UIView *contentView = (UIView *)[textField superview];
UITableViewCell *cell = (UITableViewCell *)[contentView superview];
UITableView *tableView = (UITableView *)cell.superview.superview;
NSIndexPath *indexPath = [tableView indexPathForCell:cell];
NSInteger sectionOfTheCell = [indexPath section];
NSInteger rowOfTheCell = [indexPath row];
}
else { // iOS 6
UITableViewCell *cell = (UITableViewCell *)[textField superview];
UITableView *table = (UITableView *)[cell superview];
NSIndexPath *pathOfTheCell = [table indexPathForCell:cell];
NSInteger sectionOfTheCell = [pathOfTheCell section];
NSInteger rowOfTheCell = [pathOfTheCell row];
}
And Util is
+ (BOOL)isiOSVerGreaterThen7 {
if (floor(NSFoundationVersionNumber) <= NSFoundationVersionNumber_iOS_6_1) {
return NO;
} else {
return YES;
}
}
回答5:
This is better to use
NSIndexPath *indexPath = [self.callTable indexPathForCell:(UITableViewCell *)[[[sender superview] superview] superview]];
NSLog(@"%d",indexPath.row);
回答6:
This is the best way I think:
CGPoint subviewPosition = [sender convertPoint:CGPointZero toView:self.myTable];
NSIndexPath* indexPath = [self.myTable indexPathForRowAtPoint:subviewPosition];
You can simply get the index path here. Be it iOS7 or iOS6, it will return the correct index path
来源：https://stackoverflow.com/questions/18919616/uitableviewcell-indexpath-crash-in-ios7