ios - UISplitViewController toggleMasterVisible 方法。方法在哪里定义？

Question

我可以正确调用“toggleMasterVisible”方法作为按钮操作，但我想像这样扩展该方法。

(In Button action. It works)
.h 
@interface DetailViewController : UIViewController <UISplitViewControllerDelegate>
@end

.m
UIBarButtonItem *listBarButtonItem = [[UIBarButtonItem alloc] 
initWithImage:[UIImage imageNamed:@"list.png"] 
style:UIBarButtonItemStyleBordered 
target:self.splitViewController 
action:@selector(toggleMasterVisible:)];


(I want to expand the method)
.m
UIBarButtonItem *listBarButtonItem = [[UIBarButtonItem alloc] 
initWithImage:[UIImage imageNamed:@"list.png"] 
style:UIBarButtonItemStyleBordered 
target:self 
action:@selector(toggleMasterVisibleIfCondtionIsOK:)];

-(void)toggleMasterVisibleIfCondtionIsOK
{
     if(isConditionOK){
          [self.splitViewController toggleMasterVisible];
     }
}

但是，我收到一个错误，即“没有可见的 @interface for 'UISplitViewController' 声明”。方法在哪里定义？我在参考上找不到方法（http://developer.apple.com/library/ios/#documentation/uikit/reference/UISplitViewController_class/Reference/Reference.html），我该如何调用该方法？任何帮助将不胜感激。

Answer 1

我得到了它的工作：

[self.splitViewController performSelector:@selector(toggleMasterVisible:)];

Answer 2

只需将其定义为匿名类别，如下所示：

@interface UISplitViewController()
- (void)toggleMasterVisible:(id)sender;
@end