向底部工具欄添加按鈕

Question

我有以下代碼：

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];

為什么我看不到工具欄按鈕？ 有什么問題？

Answer 1

麥加說的可能是正確的答案。 嘗試以這種方式進行。

-更新-由於問題仍然存在，因此我更新了示例，將set調用移至視圖控制器而不是導航控制器。

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