- (void)willSave
Invoked automatically by the Core Data framework when the
receiver’s
managed object context is saved. It is commonly used to compute
persisted values from other transient values, to set
timestamps, and so
on. This method can have “side effects” on the persistent values.
When I use this to do that exactly - modify the last saved
timestamp of an object, I get a hang when saving. It appears that
making the change inside of willSave causes willSave to be called
again.
- (void)willSave
{
[self setValue: [NSDate date] forKey: @"lastSavedDate"];
}
(Otherwise you're sending additional change notifications during the
save process.)
mmalc
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