我有一个包含 dataOfType 方法的 NSDocument ，但是当我做保存时，它不会被调用。
- （NSData *）dataOfType：（NSString *）typeName
error：（NSError * __ autoreleasing *）outError
{
NSLog（@db：％@，db）;
return [NSKeyedArchiver archivedDataWithRootObject：db];
}
为什么不调用？
p>您是否在创建新项目窗口中取消选中使用核心数据复选框？
I have an NSDocument that contains a dataOfType method, but it is not called when I do a save.
- (NSData *)dataOfType:(NSString *)typeName
error:(NSError *__autoreleasing *)outError
{
NSLog(@"db: %@", db);
return [NSKeyedArchiver archivedDataWithRootObject:db];
}
Why is this not called? Specifically, are there any reasons why my current document should not be the first responder that the menu-item "Save" points to?
Did you leave 'Use Core Data' checkbox unchecked on create new project window?
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