如何强制“尊重语言方向"从 RTL 到 LTR，反之亦然

问题描述

我有一个使用自动布局的应用程序.

I have an application which uses Auto Layouts.

当用户选择他或她的设备电话语言时，该应用会完美地切换 RTL 和 LTR 语言.所有文本均已本地化，并且语言方向有效.

The app switches RTL and LTR languages perfectly when the user selects he's or her's device phone language. All texts are localized, and language directions are working.

我在应用程序内还有一个按钮，可以在不重新启动应用程序的情况下更改其语言.这也很有效，所有文本都被替换了.

I also have a button inside the app, to change it's language without restarting the app. This also works great, and all texts are being replaced.

问题在于，当用户从应用程序中更改语言时，具有讽刺意味的是，我预先定义的约束中的尊重语言方向"选项没有得到尊重.

The problem is that when the user changes the language from within the app, "Respect Language Direction" option in the constraints i have pre-defined is ironically not respected.

有什么想法吗?

推荐答案

最终，我设法解决了这个问题.

Eventually, I have managed to solve this issue.

我找不到强制更改 RTL - LTR 自动布局约束的方法，因此我决定为每个语言方向复制 2 个额外的故事板.所以，实际上我的应用现在包含 3 个故事板 - Main.storyboard、StoryboardRTL.storyboard 和 StoryboardLTR.storyboard.

I couldn't find a way to force the change the RTL - LTR auto layout constraints, so i have decided to duplicate 2 additional storyboards for each language direction. So, actually my app now contains 3 storyboards - Main.storyboard, StoryboardRTL.storyboard and StoryboardLTR.storyboard.

主要处理从iDevice上的设置执行时语言方向的变化，并且RTL/LTR有自己的方向，以支持从应用程序内部更改应用程序语言.

Main handles changes in language direction when it is performed from the settings on the iDevice, and RTL / LTR is has it's own orientation, to support changing the app language from inside the app.

当用户选择更改为 RTL 语言时，我在 UserDefaults 中设置所选语言:

When the user selects to change to an RTL language, I set the selected language in the UserDefaults:

    [[NSUserDefaults standardUserDefaults] setObject:[NSArray arrayWithObjects:@"he", nil] forKey:@"AppleLanguages"];
    [[NSUserDefaults standardUserDefaults] synchronize];

在我调用我在 AppDelegate 中编写的方法之后，它会根据语言布局更改情节提要.

and right after i call a method i have written in the AppDelegate, which changes the storyboard according to the language layout.

- (void)reloadStoryboard
{
    UIStoryboard *storyboard;

    switch ([AALanguageManager getCurrentLanguage]) {

        case CurrentLanguageRTL:
            storyboard = [UIStoryboard storyboardWithName:@"StoryboardRTL" bundle:[NSBundle mainBundle]];
            break;
        default:
            storyboard = [UIStoryboard storyboardWithName:@"StoryboardLTR" bundle:[NSBundle mainBundle]];
            break;
    }

    self.window.rootViewController = [storyboard instantiateInitialViewController];
    [self.window makeKeyAndVisible];
}

这对用户来说就像应用重新启动一样，并显示具有 RTL/LTR 布局的正确情节提要.当用户再次重新启动应用程序时，选择的语言已经设置好，主情节提要显示出来，所有的布局都根据选择的语言正确.

This looks to the user as if the app restarted, and display the proper storyboard with the RTL / LTR layout. When the user restarts the app again, the selected language is already set, and the main storyboard is displayed, with all the correct layout according to selected language.

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