Question

我有UIViewController UINavigationBarDelegate委托，我以编程方式设置所有内容，我的应用程序是多语言，因此我需要在NavigationBar等每个部分支持RTL（从右到左）。我用这种方法：

if MSGlobal.setting.language.direction == .L2R
{
    navigationItem.setRightBarButtonItems(rightItems, animated: true)
}
else
{
    navigationItem.setLeftBarButtonItems(rightItems, animated: true)
}
let stackCount = navigationController!.viewControllers.count
if stackCount == 1
{
    let leftBtnItem:UIBarButtonItem = UIBarButtonItem(image: UIImage(named:"drawer"), landscapeImagePhone: UIImage(named:"drawer"), style: UIBarButtonItemStyle.Plain, target: self, action: "cb_drawerTapped:")
    if MSGlobal.setting.language.direction == .L2R
    {
        navigationItem.setLeftBarButtonItem(leftBtnItem, animated: true)
    }
    else
    {
        navigationItem.setRightBarButtonItem(leftBtnItem, animated: true)
    }
}
else
{
    navigationItem.backBarButtonItem = UIBarButtonItem(title: "", style: UIBarButtonItemStyle.Plain, target: self, action: "cb_back:")
}

一切都在LTR语言中正常工作，如英语，但在RTL语言后退按钮未显示。我的结果必须是这样的：

LTR:   [ <      Title      [btn1...btnn]]
RTL:   [[btnn...btn1]      Title      > ]

Answer 1

如果您的目标是使UIBarButtonItem拥有正确的后退动作，则可以通过将Storyboard Semantic更改为Force-Right-to-Left来通过Storyboard进行更改。或以下代码：

雨燕5

在您的ViewController viewDidLoad()内：

self.navigationController?.navigationBar.semanticContentAttribute = .forceRightToLeft

如果您想更改导航栏，并且导航控制器从右向左流动，则可以使用：

override func viewDidLoad() {
    super.viewDidLoad()
    self.navigationController?.navigationBar.semanticContentAttribute = .forceRightToLeft
    self.navigationController?.view.semanticContentAttribute = .forceRightToLeft
}

如果您想更改整个应用的RTL，请使用：

UIView.appearance().semanticContentAttribute = .forceLeftToRight

swift：使导航栏从右到左（rtl）包含左右

1 个答案:

雨燕5