小编rus*_*ner的帖子

我在使用启用ARC的NSOperation中保存NSManagedObjectContext时发现了一些问题.没有ARC,一切都很好.在保存期间始终提供EXC_BAD_ACCESS.代码如下所示:

//on the main thread
-(void)someFunc
{
    array = ... //fetching an array of entities from a core data
    for(SomeEntity * obj in array)
    {
         NSSomeOperation * op = [[NSSomeOperation alloc] initWithValue:[obj someField]];
         //start an operation
    }
}

//NSSomeOperation implementation
//...
- (void)main {
    //some code
    NSError * error = nil;
    [mainContext lock];
    if (![mainContext save:&error]) {    //<--- HERE EXC_BAD_ACCESS
       //process error
    }      
    [mainContext unlock];
    //some code
}
//...

使用[mainContext setRetainsRegisteredObjects:YES]和objectWithID不能解决此问题.

EXC_BAD_ACCESS(代码= 1)
EXC_BAD_ACCESS(代码= 13)

-[__NSCFType contextDidSave:]: unrecognized selector sent …