核心數據：實體屬性混合

Question

我有一個NSWindow我用它來創建新的記錄。按下添加按鈕之後，一定的方法被調用，其中i執行以下操作：

- (IBAction)addActionAddSheet:sender { 
    NSManagedObjectContext *moc = [self managedObjectContext]; 
    NSManagedObject *newObject = [NSEntityDescription insertNewObjectForEntityForName:@"Recipe" inManagedObjectContext:moc]; 

    [newObject setValue:[newRecipeName stringValue] forKey:@"name"]; 
    [newObject setValue:[newRecipeInstructions string] forKey:@"instructions"]; 

    NSLog(@"New object is: %@", newObject); 

    [NSApp endSheet:addSheet]; 
    [addSheet orderOut:sender]; 
} 

從NSLog的（編輯）的輸出我兩次執行該後，如下：

<NSManagedObject: 0x10045c6a0> (entity: Recipe; id: 0x1004564a0 <x-coredata:///Recipe/t18FEC674-8937-49DF-A18B-940EF82E83C32> ; data: { 
    instructions = X; 
    name = X; 
}) 
<NSManagedObject: 0x1149069a0> (entity: Recipe; id: 0x100106a20 <x-coredata:///Recipe/t18FEC674-8937-49DF-A18B-940EF82E83C33> ; data: { 
    instructions = Y; 
    name = Y; 
}) 

這完全如預期。但是，綁定到數組控制器的我的tableview顯示對象X和Y具有X作爲instructions的值。

當我離開我的應用程序和數據保存，我在我的xml文件中看到的是不同的再次：

<attribute name="name" type="string">Y</attribute> 
    <attribute name="instructions" type="string">Y</attribute> 

    <attribute name="name" type="string">X</attribute> 
    <attribute name="instructions" type="string">Y</attribute> 

這一次他們都有價值ÿ。

從NSLog的輸出確實表明我在這裏處理兩個不同的對象，所以我不知道我可能會做什麼，這可能會影響兩者。

這些是我的未編輯的輸出：

2009-12-07 14:46:18.409 Recipe[11578:a0f] managedObjectContext 
2009-12-07 14:46:18.411 Recipe[11578:a0f] persistentStoreCoordinator 
2009-12-07 14:46:18.411 Recipe[11578:a0f] managedObjectModel 
2009-12-07 14:46:18.423 Recipe[11578:a0f] applicationSupportDirectory 
2009-12-07 14:46:18.436 Recipe[11578:a0f] externalRecordsDirectory 
2009-12-07 14:46:20.484 Recipe[11578:a0f] Show Add sheet 
2009-12-07 14:46:20.485 Recipe[11578:a0f] Clear values 
2009-12-07 14:46:20.494 Recipe[11578:a0f] call beginSheet 
2009-12-07 14:46:23.632 Recipe[11578:a0f] addActionAddSheet: -- Add button clicked 
2009-12-07 14:46:23.632 Recipe[11578:a0f] Create new mananged obj in context 
2009-12-07 14:46:23.634 Recipe[11578:a0f] managedObjectContext 
2009-12-07 14:46:23.635 Recipe[11578:a0f] Set values for name and instructions 
2009-12-07 14:46:23.636 Recipe[11578:a0f] New object is: <NSManagedObject: 0x1001c89c0> (entity: Recipe; id: 0x1001c9470 <x-coredata:///Recipe/tE9BD4EE3-082C-4715-AB66-2C3580223F9E2> ; data: { 
    instructions = A; 
    name = A; 
}) 
2009-12-07 14:46:23.636 Recipe[11578:a0f] call [NSApp endSheet:] and [addSheet orderOut:] 
2009-12-07 14:46:23.637 Recipe[11578:a0f] addSheetDidEnd:returnCode:contextInfo: -- empty method 
2009-12-07 14:46:35.327 Recipe[11578:a0f] Show Add sheet 
2009-12-07 14:46:35.328 Recipe[11578:a0f] Clear values 
2009-12-07 14:46:35.337 Recipe[11578:a0f] call beginSheet 
2009-12-07 14:46:39.836 Recipe[11578:a0f] addActionAddSheet: -- Add button clicked 
2009-12-07 14:46:39.836 Recipe[11578:a0f] Create new mananged obj in context 
2009-12-07 14:46:39.838 Recipe[11578:a0f] managedObjectContext 
2009-12-07 14:46:39.839 Recipe[11578:a0f] Set values for name and instructions 
2009-12-07 14:46:39.843 Recipe[11578:a0f] New object is: <NSManagedObject: 0x102070ad0> (entity: Recipe; id: 0x10205e420 <x-coredata:///Recipe/tE9BD4EE3-082C-4715-AB66-2C3580223F9E3> ; data: { 
    instructions = B; 
    name = B; 
}) 
2009-12-07 14:46:39.843 Recipe[11578:a0f] call [NSApp endSheet:] and [addSheet orderOut:] 
2009-12-07 14:46:39.844 Recipe[11578:a0f] addSheetDidEnd:returnCode:contextInfo: -- empty method 

配方A：

http://web.me.com/bpeiren/recipeA.png

配方B：

http://web.me.com/bpeiren/recipeB.png

我的陣列控制器：

個

http://web.me.com/bpeiren/Cocoa/so/array_controller.png

我的表列的綁定：

http://web.me.com/bpeiren/Cocoa/so/tablecolumn.png

我的標籤的結合：

http://web.me.com/bpeiren/Cocoa/so/label.png

Answer 1

你如何結合你的表/列陣列控制器？這聽起來好像您的指令列沒有綁定到arrangeObjects.instructions，但可能selection.instructions。