在导航控制器中使自定义后退按钮的可点击区域更小答案

【问题标题】：Make custom back button's clickable area smaller in Navigation controller在导航控制器中使自定义后退按钮的可点击区域更小
【发布时间】：2013-05-09 08:43:32
【问题描述】：

我用下面的代码创建了一个自定义后退按钮，但是可点击区域非常大，远远超出了图标本身。有谁知道如何设置可点击区域，或使其与图像大小相同？

谢谢

UIImage *buttonImage = [UIImage imageNamed:@"prefs"];

UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];

[button setImage:buttonImage forState:UIControlStateNormal];

button.frame = CGRectMake(0, 0, buttonImage.size.width, buttonImage.size.height);

[button addTarget:self action: @selector(handleBackButton)
    forControlEvents:UIControlEventTouchUpInside];

UIBarButtonItem *customBarItem = [[UIBarButtonItem alloc] initWithCustomView:button];

self.navigationItem.leftBarButtonItem = customBarItem;

可点击区域显示为红色。

谢谢！

【问题讨论】：

可以尝试记录 buttonImage.size.width/height 看看它是否是它应该是的，如果它是硬编码 W/H 的问题
看看stackoverflow.com/a/11716377/1328096

标签： iphone ios uinavigationcontroller uinavigationbar uinavigationitem

【解决方案1】：

如果您想阻止按钮以外的点击，请将自定义按钮添加到 UIView，然后将该视图设置为 barbuttonItem 的自定义视图

你的代码会变成这样：

UIImage *buttonImage = [UIImage imageNamed:@"prefs"];
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setImage:buttonImage forState:UIControlStateNormal];
button.frame = CGRectMake(0, 0, buttonImage.size.width, buttonImage.size.height);
[button addTarget:self action: @selector(handleBackButton)
forControlEvents:UIControlEventTouchUpInside];

UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, buttonImage.size.width, buttonImage.size.height)];
[view addSubview:button];

UIBarButtonItem *customBarItem = [[UIBarButtonItem alloc] initWithCustomView:view];
self.navigationItem.leftBarButtonItem = customBarItem;

这应该对我有用。

【讨论】：

【解决方案2】：

@Prasad Devediga，swift 版本非常好用：

        let btnName = UIButton()
        btnName.setImage(UIImage(named: "settings_filled_25"), forState: .Normal)
        btnName.frame = CGRectMake(0, 0, 30, 30)
        btnName.addTarget(self, action: Selector("toggleRight"), forControlEvents: .TouchUpInside)

        var rightView = UIView()
        rightView.frame = CGRectMake(0, 0, 30, 30)
        rightView.addSubview(btnName)

        let rightBarButton = UIBarButtonItem()
        rightBarButton.customView = rightView
        self.navigationItem.rightBarButtonItem = rightBarButton

【讨论】：