核心数据示例，无效更新：部分0中的行数无效 [英] Core Data example, Invalid update: invalid number of rows in section 0
问题描述
我是新手在iOS和XCode，我正在通过一个Core Data教程，我真的很累。我不断收到以下错误日志中的错误：
I am novice at iOS and XCode, and am working through a Core Data tutorial and am really stumped. I continually get the error in the error logs of the following:
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Application Specific Information:
iPhone Simulator 235, iPhone OS 4.2 (iPad/8C134)
*** 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 (0) must be equal to the number of rows contained in that section before the update (0), plus or minus the number of rows inserted or deleted from that section (1 inserted, 0 deleted).'
*** Call stack at first throw:
(
0 CoreFoundation 0x010a6be9 __exceptionPreprocess + 185
1 libobjc.A.dylib 0x00e9b5c2 objc_exception_throw + 47
2 CoreFoundation 0x0105f628 +[NSException raise:format:arguments:] + 136
3 Foundation 0x000b447b -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 116
4 UIKit 0x00336a0f -[UITableView(_UITableViewPrivate) _endCellAnimationsWithContext:] + 8424
5 UIKit 0x00325f81 -[UITableView insertRowsAtIndexPaths:withRowAnimation:] + 56
6 SimpleRes 0x00002496 -[RootViewController addReservation] + 465
7 UIKit 0x002b9a6e -[UIApplication sendAction:to:from:forEvent:] + 119
8 UIKit 0x004c7167 -[UIBarButtonItem(UIInternal) _sendAction:withEvent:] + 156
9 UIKit 0x002b9a6e -[UIApplication sendAction:to:from:forEvent:] + 119
10 UIKit 0x003481b5 -[UIControl sendAction:to:forEvent:] + 67
11 UIKit 0x0034a647 -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 527
12 UIKit 0x003491f4 -[UIControl touchesEnded:withEvent:] + 458
13 UIKit 0x002de0d1 -[UIWindow _sendTouchesForEvent:] + 567
14 UIKit 0x002bf37a -[UIApplication sendEvent:] + 447
15 UIKit 0x002c4732 _UIApplicationHandleEvent + 7576
16 GraphicsServices 0x018bda36 PurpleEventCallback + 1550
17 CoreFoundation 0x01088064 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 52
18 CoreFoundation 0x00fe86f7 __CFRunLoopDoSource1 + 215
19 CoreFoundation 0x00fe5983 __CFRunLoopRun + 979
20 CoreFoundation 0x00fe5240 CFRunLoopRunSpecific + 208
21 CoreFoundation 0x00fe5161 CFRunLoopRunInMode + 97
22 GraphicsServices 0x018bc268 GSEventRunModal + 217
23 GraphicsServices 0x018bc32d GSEventRun + 115
24 UIKit 0x002c842e UIApplicationMain + 1160
25 SimpleRes 0x00001ab0 main + 102
26 SimpleRes 0x00001a41 start + 53
)
这是我的addReservation代码：
Here is my addReservation code:
-(void)addReservation{
// Create and configure a new instance of the Event entity.
Reservations *reservation = (Reservations *)[NSEntityDescription insertNewObjectForEntityForName:@"Reservations" inManagedObjectContext:managedObjectContext];
[reservation setEnd_Time: [[NSDate alloc]init]];
[reservation setReservation_Date:[[NSDate alloc]init]];
[reservation setStart_Time:[NSDate date]];
[reservation setParty_Size: [NSNumber numberWithInt:4]];
[reservation setPhone_Number: [NSNumber numberWithInt: 1234567890]];
[reservation setName: @"Keith"];
[reservation setNotes: @"He's really hot!"];
[reservation setPerson_Responsible: @"Lisa"];
[reservation setTables_Excluded: @"3,5,8"];
NSError *error = nil;
if (![managedObjectContext save:&error]) {
}
[resArray insertObject:reservation atIndex:0];
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0];
[self.tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:indexPath]
withRowAnimation:UITableViewRowAnimationFade];
[self.tableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:0] atScrollPosition:UITableViewScrollPositionTop animated:YES];
}
我相信我的resArray没有从我输入的方法
I believe that my resArray is not getting the data from the method that I input in programatically, but I am not sure, and I am not sure how to fix it.
任何帮助是值得赞赏的。
Any help is appreciated.
推荐答案
我会看看你的实现
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
从numberOfRowsInSection返回的值不等于上一个值加上使用insertRowsAtIndexPaths添加的行数。如果numberOfRowsInSection的实现使用[myArray count]，那么请确保使用的数组实例与要添加预留条目的数组实例相同。如果你没有实现这个方法，那将是你的问题。下面是一个示例：
The error you specified occurs when the value returned from numberOfRowsInSection does not equal the previous value plus the number of rows you added using insertRowsAtIndexPaths. If your implementation of numberOfRowsInSection is using [myArray count], then make sure that the array instance used is the same one into which you are adding the reservation entry. If you have not implemented this method, then that would be your problem. Here is an example of how that method should look:
- (NSInteger)tableView:(UITableView *)tableView
numberOfRowsInSection:(NSInteger)section {
return [resArray count];
}
作为备份，您可以添加列出数组大小的日志语句前后加法，和里面的numberOfRowsInSection函数。
As a backup, you can add log statements that list the size of the array before and after the addition, and inside of the numberOfRowsInSection function.
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