自定义iOS6中的导航栏按钮

Question

更新 - 一种可能的解决方案

根据Alexander Merchi在这篇文章(UINavigationBar中的UIBarButtonItem Custom视图)中给出的答案,找到了一个解决方案.但仍然不知道如何正确改变图像的位置.

UIButton *btn =  [UIButton buttonWithType:UIButtonTypeCustom];
        [btn setFrame:CGRectMake(0, 0, 28.0f, 28.0f)]; // 28 points is the width or height of the button image
        [btn setBackgroundImage:[UIImage imageNamed:@"button.png"] forState:UIControlStateNormal];
        [btn addTarget:self action:@selector(onClickMenuButton) forControlEvents:UIControlEventTouchUpInside];
        btnMenu = [[UIBarButtonItem alloc] initWithCustomView:btn];

原帖

在iOS 6中,目标是这样的:

而目前的结果是这样的:

我的代码是

btnMenu = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"button.png"]
                                           style:UIBarButtonItemStylePlain
                                          target:self 
                                          action:@selector(onClickMenuButton)];

button.png是白色的圆圈,里面有白色的三个条纹和一个透明的背景.

Answer 1

UIButton *rightButton = [UIButton buttonWithType:UIButtonTypeCustom];
rightButton.frame = CGRectMake(0, 0, 30, 30);
[rightButton setImage:[UIImage imageNamed:@"Button-normal"] forState:UIControlStateNormal];
[rightButton setImage:[UIImage imageNamed:@"logout-hover"] forState:UIControlStateHighlighted];
[rightButton addTarget:self action:@selector(logOut) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:rightButton];
self.navigationItem.leftBarButtonItem = rightBarButtonItem;