Question

我正在使用iOS 6.1，并希望在加载视图时以编程方式向UINavigationItem添加标题为“Info”的自定义宽度的UIBarButtonItem。 我不想使用图片来实现这一目标。

我阅读了几个关于如何更改UIBarButtonItem宽度的线程，似乎没有一个对我有效。

我尝试了这个，但按钮没有出现：

- (void)viewDidLoad
{
    UIView *infoButtonView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 50, 44)];
    UIBarButtonItem *infoButton2 = [[UIBarButtonItem alloc] initWithCustomView:infoButtonView];

    [infoButton2 setStyle:UIBarButtonItemStyleBordered];
    [infoButton2 setTitle:@"Info"];
    self.navigationItem.rightBarButtonItem = infoButton2;
}

这段代码出了什么问题？

Answer 1

//This worked for me    
UIButton *searchButton =[[UIButton alloc]init];
        searchButton.frame=CGRectMake(0, 0, 200, 40);
        [searchButton setTitle:@"Info" forState:UIControlStateNormal];
         searchButton.backgroundColor= [UIColor greenColor];
        [searchButton addTarget:self action:@selector(onFilter) forControlEvents:UIControlEventTouchUpInside];
        UIBarButtonItem *searchBarButton=[[UIBarButtonItem alloc] initWithCustomView:searchButton] ;
        self.navigationItem.rightBarButtonItem = searchBarButton;

Answer 2

您也可以像这样添加按钮..

 - (void)viewDidLoad
    {
      UIView *infoButtonView = [[UIView alloc] initWithFrame:CGRectMake(0, 20, 50, 44)];
        [infoButtonView setBackgroundColor:[UIColor clearColor]];

        UIButton *button1 = [[UIButton alloc]initWithFrame:CGRectMake(0,15,45,21)];
        [button1 setTitle:@"Info" forState:UIControlStateNormal];
        button1.backgroundColor=[UIColor redColor];
        [infoButtonView addSubview:button1];

        UIBarButtonItem *infoButton2 = [[UIBarButtonItem alloc] initWithCustomView:infoButtonView];
        self.navigationItem.rightBarButtonItem = infoButton2;
    }

如何在不使用图像的情况下以编程方式将自定义宽度的UIBarButtonItem添加到UINavigationItem

2 个答案: