UIBarButton点击区域大于customView

Question

我正在尝试使用导航栏中的自定义按钮，而没有左边和右边的空格边框，如下一张图片：

这是创建te barButton的代码：

UIImage *backImage = [UIImage imageNamed:@"back"];
UIImage *backImageTapped = [UIImage imageNamed:@"back_tap"];

UIButton *backButton = [UIButton buttonWithType:UIButtonTypeCustom];
[backButton setImage:backImage forState:UIControlStateNormal];
[backButton setImage:backImageTapped forState:UIControlStateHighlighted];

backButton.frame = CGRectMake(0, 0, 44, 44);

[backButton addTarget:self
                action:@selector(backTaped)
      forControlEvents:UIControlEventTouchUpInside];

UIBarButtonItem *backBarButton =[[UIBarButtonItem alloc] initWithCustomView:backButton];

[self.navigationItem setLeftBarButtonItem:backBarButton];

我使用UINavigationItem扩展删除空格，插入带宽负的barButtomItem：

UIBarButtonItem *space = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
space.width = -16;
return space;

此时它看起来很棒，但问题是两个按钮的可点击区域不是每个图像的大小，它更大，类似于下一个图像的灰色区域：

我已经阅读了很多问题试图通过改变hitTestEdgeInsets（https://stackoverflow.com/a/13067285/3560424）或覆盖 - （UIEdgeInsets）alignmentRectInsets的UIButton类来解决它，但似乎没有什么能解决它......

提前感谢您提供任何帮助

Answer 1

最后，我通过使用UIButton作为子视图的中间UIView，并使用UIView作为UIBarButtonItem的自定义视图来实现它。

问题在于我无法解释原因......但它有效

代码：

UIImage *backImage = [UIImage imageNamed:@"back"];
UIImage *backImageTapped = [UIImage imageNamed:@"back_tap"];

UIButton *backButton = [UIButton buttonWithType:UIButtonTypeCustom];
[backButton setImage:backImage forState:UIControlStateNormal];
[backButton setImage:backImageTapped forState:UIControlStateHighlighted];

backButton.frame = CGRectMake(0, 0, 44, 44);

[backButton addTarget:self
                action:@selector(backTaped)
      forControlEvents:UIControlEventTouchUpInside];

UIView *viewBackButton = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 44, 44)];
[viewBackButton addSubview:backButton];

UIBarButtonItem *backBarButton =[[UIBarButtonItem alloc] initWithCustomView:viewBackButton];

[self.navigationItem setLeftBarButtonItem:backBarButton];

Answer 2

但是如果你在故事板中添加按钮，你可以debugRelease并选择图像。像这样