ios – 核心数据崩溃 – 无法识别的选择器

概述我已经看过其他关于无法识别的选择器错误的帖子,但是关于以下方法中自动生成的代码没有任何内容： - (void)tableView:(UITableView *)tableView commitEditingStyle:forRowAtIndexPath: 当我滑动删除时调用此方法,当我点击删除按钮时出现以下错误： -[Vehicle removeObjectFromGasUpsAtIndex:]: 我已经看过其他关于无法识别的选择器错误的帖子,但是关于以下方法中自动生成的代码没有任何内容：

- (voID)tableVIEw:(UItableVIEw *)tableVIEw commitEditingStyle:forRowAtIndexPath:

当我滑动删除时调用此方法,当我点击删除按钮时出现以下错误：

-[Vehicle removeObjectFromGasUpsAtIndex:]: unrecognized selector sent to instance 0x8172c60

我的NSManagedobject类Vehicle有一个名为gasUps的NSOrderedSet变量,当我要删除它时,它应响应此消息.或者我想.

这是崩溃的整个方法：

- (voID)tableVIEw:(UItableVIEw *)tableVIEw commitEditingStyle:(UItableVIEwCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath{   if (editingStyle == UItableVIEwCellEditingStyleDelete) {    // need to delete gas up and not vehicle    int row = [indexPath row];    //[self.selectedVehicle removeObjectFromGasUpsAtIndex:row];    [self.selectedVehicle removeObjectFromGasUpsAtIndex:row];    NSError *error = nil;    if (![self.managedobjectContext save:&error]) {         // Replace this implementation with code to handle the error appropriately.         // abort() causes the application to generate a crash log and terminate. You should not use this function in a shipPing application,although it may be useful during development.         NSLog(@"Unresolved error %@,%@",error,[error userInfo]);        abort();    } }   }

为什么这个选择器无法识别？

编辑：这是为了Jody.

#import <Foundation/Foundation.h>#import <CoreData/CoreData.h>typedef enum {    FullExtract,nameExtract} kTitleExtract;@interface Vehicle : NSManagedobject@property (nonatomic,retain) Nsstring * name;@property (nonatomic,retain) NSNumber * year;@property (nonatomic,retain) Nsstring * make;@property (nonatomic,retain) NSNumber * mileage;@property (nonatomic,retain) Nsstring * model;@property (nonatomic,retain) NSOrderedSet *gasUps;// added methods- (Nsstring *)getTitleExtract:(kTitleExtract)TitleExtract;@end@interface Vehicle (CoreDataGeneratedAccessors)- (voID)insertObject:(NSManagedobject *)value inGasUpsAtIndex:(NSUInteger)IDx;- (voID)removeObjectFromGasUpsAtIndex:(NSUInteger)IDx;- (voID)insertGasUps:(NSArray *)value atIndexes:(NSIndexSet *)indexes;- (voID)removeGasUpsAtIndexes:(NSIndexSet *)indexes;- (voID)replaceObjectInGasUpsAtIndex:(NSUInteger)IDx withObject:(NSManagedobject *)value;- (voID)replaceGasUpsAtIndexes:(NSIndexSet *)indexes withGasUps:(NSArray *)values;- (voID)addGasUpsObject:(NSManagedobject *)value;- (voID)removeGasUpsObject:(NSManagedobject *)value;- (voID)addGasUps:(NSOrderedSet *)values;- (voID)removeGasUps:(NSOrderedSet *)values;@end

以下是设置self.selectedVehicle的代码片段：

if (self.vehiclesArray != nil  && [self.vehiclesArray count] != 0 && self.vehicleIndex != -1) {    // enable add buttom    [self.navigationItem.rightbarbuttonItem setEnabled:YES];    self.selectedVehicle = [self.vehiclesArray objectAtIndex:self.vehicleIndex];    NSLog(@"set selected vehicle");} else {    // disable add button    [self.navigationItem.rightbarbuttonItem setEnabled:NO];    // set vehicle defaults to -1 and make disable add buttom    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];    [defaults setInteger:-1 forKey:@"vehicleIndex"];    [defaults synchronize];    NSLog(@"set index to -1");}

解决方法 这可能与有序一对多关系的Core Data自动生成的访问器中的已知错误有关.

rdar://10114310

在解决此问题之前,您需要为缺少的访问者提供自己的实现.

见@L_404_1@的答案

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