将按钮添加到底部工具栏

Question

我有以下代码：

self.shareButton=[[UIButton alloc] initWithFrame:CGRectMake(0.0, 0.0, 35, 35)];
[shareButton setBackgroundColor:[UIColor blueColor]];
[shareButton setBackgroundImage:[UIImage imageNamed:@"share_button"] forState:UIControlStateNormal];
[shareButton setBackgroundImage:[UIImage imageNamed:@"share_button_pressed"] forState:UIControlStateHighlighted];
[shareButton addTarget:self action:@selector(shareButtonPressed:) forControlEvents:UIControlEventTouchUpInside];
[self.navigationController setToolbarItems:[NSArray arrayWithObject:shareButton] animated:YES];

为什么我看不到工具栏按钮？有什么问题？

Answer 1

meggar说的可能是正确的答案。试着这样做。

- UPDATE-- 由于问题仍然存在，我已经更新了示例，将set调用移动到视图控制器而不是导航控制器。

UIBarButtonItem *barButtonItem = [[UIBarButtonItem alloc] initWithCustomView:shareButton];
[self setToolbarItems:[NSArray arrayWithObject:barButtonItem] animated:YES];
[barButtonItem release];