The Application crashes at replaceobjectatindex - ios

Question

The application crashes at replaceobjectatindex .
The clickedbuttonpath.row returns nil value . Need help .
- (void)textFieldDidEndEditing:(UITextField *)textField
{
if (textField.text.length>0)
{
UITableViewCell *clickedCell = (UITableViewCell *)[[textField superview] superview];
NSIndexPath *clickedButtonPath = [addSizesTableView_ indexPathForCell:clickedCell];
if (textField.tag==6)
{
[textDic setObject:textField.text forKey:clickedButtonPath];
[orderArr replaceObjectAtIndex:clickedButtonPath.row withObject:textField.text];
This is the crash log which am getting .
'NSInvalidArgumentException', reason: '* setObjectForKey: key cannot be nil'
* First throw call stack:
(
0 CoreFoundation 0x0000000106d1ef35 exceptionPreprocess + 165
1 libobjc.A.dylib 0x00000001062acbb7 objc_exception_throw + 45
2 CoreFoundation 0x0000000106c25998 -[__NSDictionaryM setObject:forKey:] + 968
3 BookMyStock 0x0000000103559ac0 -[AddSizesOfColors textFieldDidEndEditing:] + 368
4 UIKit 0x0000000105289549 -[UITextField _resignFirstResponder] + 382
5 UIKit 0x0000000104ccc4f5 -[UIResponder resignFirstResponder] + 236
6 UIKit 0x00000001052892d4 -[UITextField resignFirstResponder] + 114
7 UIKit 0x0000000105295953 -[UIView(UITextField) endEditing:] + 173
8 BookMyStock 0x0000000103557c2d -[AddSizesOfColors addTFTotheView] + 285
9 UIKit 0x0000000104b568be -[UIApplication sendAction:to:from:forEvent:] + 75
10 UIKit 0x0000000104c5d410 -[UIControl _sendActionsForEvents:withEvent:] + 467
11 UIKit 0x0000000104c5c7df -[UIControl touchesEnded:withEvent:] + 522
12 UIKit 0x0000000104b9c308 -[UIWindow _sendTouchesForEvent:] + 735
13 UIKit 0x0000000104b9cc33 -[UIWindow sendEvent:] + 683
14 UIKit 0x0000000104b699b1 -[UIApplication sendEvent:] + 246
15 UIKit 0x0000000104b76a7d _UIApplicationHandleEventFromQueueEvent + 17370
16 UIKit 0x0000000104b52103 _UIApplicationHandleEventQueue + 1961
17 CoreFoundation 0x0000000106c54551 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 17
18 CoreFoundation 0x0000000106c4a41d __CFRunLoopDoSources0 + 269
19 CoreFoundation 0x0000000106c49a54 __CFRunLoopRun + 868
20 CoreFoundation 0x0000000106c49486 CFRunLoopRunSpecific + 470
21 GraphicsServices 0x0000000108bdc9f0 GSEventRunModal + 161
22 UIKit 0x0000000104b55420 UIApplicationMain + 1282
23 BookMyStock 0x0000000103492913 main + 115
24 libdyld.dylib 0x0000000107c7e145 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException

Answer 1

[[textField superview] superview] returns nil, incase of iOS 8, whereas in iOS 7 it returns some value. As suggested in below link, don't rely on view hierarchy.
You can check this link Getting UITableViewCell from its superview iOS 7 issue
You can try below like structure
CGPoint subviewPosition = [textField convertPoint:CGPointZero toView:self.tableView];
NSIndexPath* clickedButtonPath = [addSizesTableView_ indexPathForRowAtPoint:subviewPosition];