如何为 UIToolbar 上的按钮添加滚动条？

问题
如何向 UIBarButtonItem 按钮添加滚动（在工具栏上放置多个按钮）？

UI工具栏

非常感谢您的帮助！

回答
替换工具栏的superview：

1. buttonDone = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(buttonDoneDown)];
   
2. NSArray *itemsArray = [NSArray arrayWithObjects:buttonDone, nil];
   
3. 
   
4. UIScrollView *scrollView = [[UIScrollView alloc] init];
   
5. scrollView.frame = toolbar.frame;
   
6. scrollView.bounds = toolbar.bounds;
   
7. scrollView.autoresizingMask = toolbar.autoresizingMask;
   
8. scrollView.showsVerticalScrollIndicator = false;
   
9. scrollView.showsHorizontalScrollIndicator = false;
   
10. //scrollView.bounces = false;
    
11. UIView *superView = toolbar.superview;
    
12. [toolbar removeFromSuperview];
    
13. toolbar.autoresizingMask = UIViewAutoresizingNone;
    
14. toolbar.frame = CGRectMake(0, 0, X, toolbar.frame.size.height);
    
15. toolbar.bounds = toolbar.frame;
    
16. [toolbar setItems:itemsArray];
    
17. scrollView.contentSize = toolbar.frame.size;
    
18. [scrollView addSubview:toolbar];
    
19. [superView addSubview:scrollView];

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