cocoa - XCode 调试器中的这些错误意味着什么？

Question

我在 XCode 中有 2 个错误，正在尝试找出它们的含义。

第一个:

2009-06-30 18:56:27.998 Spark[4584:10b] Error setting value for key path filterPredicate of object <NSArrayController: 0x1482c0>[entity: group, number of selected objects: 1] (from bound object <NSSearchField: 0x143f20> with object ID 1387 in Nib named MainMenu.nib): [<NSManagedObject 0x1d8170> valueForUndefinedKey:]: the entity group is not key value coding-compliant for the key keyPath.

第二个:

2009-06-30 18:55:09.773 Spark[4552:10b] Stack: (
    2517123243,
    2530655803,
    2517122699,
    2517122762,
    2460660063,
    2460665405,
    2460666553,
    2460658608,
    2460656933,
    2506231425,
    2460658608,
    2460656933,
    2506235920,
    2506231206,
    2506463760,
    2506487015,
    2460658608,
    2460656933,
    2506207562,
    2506207014,
    2460658608,
    2460665405,
    2460666553,
    2460658608,
    2460656933,
    2506203090,
    2460658608,
    2460656933,
    2506200493,
    2506198904,
    2506197947,
    2506197753,
    2506196904,
    8232
)

它们是什么意思？

Answer 1

您似乎尝试根据对象中名为“group”的键进行过滤，而该对象没有名为“group”的键。

其余部分是堆栈跟踪。