SPLocalizedString

SPLocalizedString is a library to help iOS developers to localize their apps.

Features:

Context-based keys
Plural strings
Customized genstrings tool (called spgenstrings) to extract all localizable text from your source code

Features of spgenstrings:

Based on the work of Cocoanetics on DTLocalizableStringScanner
Works with SPLocalizedString
Merges the extracted localized strings with the ones that you already had (probably already translated)
Removes unused strings and tables if you wish

Why?

Let's face the truth: genstrings and the key-based NSLocalizedString with comments are not the best tools to localize your apps. Some reasons:

genstrings overrides old files with the new ones (with some translations probably). Therefore you have to manage merging them.
Adding comments with NSLocalizedString gives the translator a hint about the context, but two strings with the same key and different comments cannot be referenced from your code separately.
A key-per-context approach forces you to provide default values for your localized strings or create a strings file during the development cycle.
It's a closed system: you cannot alter the way these two tools work together because they're not open source. If you don't like SPLocalizedString, fork it and make pull requests or build your own tools :)

Install SPLocalizedString

Using CocoaPods

Add SPLocalizedString to your Podfile:

platform :ios, "6.0"
pod 'SPLocalizedString'

Run the following command:

pod install

Static Library

Clone the project or add it as a submodule. Drag SPLocalizedString.xcodeproj to your project, add it as a target dependency and link libSPLocalizedString.a. Then, you can simply do:
```
#import <SPLocalizedString/SPLocalizedString.h>
```
Manually

Clone the project or add it as a submodule. Drag the whole SPLocalizedString folder to your project.

Usage of SPLocalizedString

Its usage is very similar to NSLocalizedString, but with a fundamental change: aside from the key you don't provide a comment, you provide a context. Example:

someLabel.text = SPLocalizedString(@"Name", @"Name label in login screen")
...
otherLabel.text = SPLocalizedString(@"Name", @"Name label in registration screen")

Depending on your UI layout, the target languages and other factors, you may need different texts for those two labels even if they have the same text in the beginning. Therefore, SPLocalizedString considers the context as part of the key.

In order to fulfill these strings properly, you'll need a Localizable.strings file with the following lines:

"(Name label in login screen)Name" = "Name";
"(Name label in registration screen)Name" = "Name";

As you can see, for each string the actual key is made of the context and the key you specified with SPLocalizedString.

This file can be automatically generated with spgenstrings. If you don't have a strings file yet, the default value will be the given key (in this case Name).

Plurals

SPLocalizedString provides some useful functions to manage plurals: SPLocalizedStringPlural, which accepts an additional parameter after the context indicating the number of elements referenced in the string. For example:

NSString *formatString = SPLocalizedStringPlural(@"You have %d followers.", @"Number of followers label", numberOfFollowers);
followersLabel.text = [NSString stringWithFormat:formatString, numberOfFollowers];

In order to fulfill these strings properly, you'll need a Localizable.strings file with the following lines:

"(Number of followers label##one)You have %d followers." = "You have %d followers.";
"(Number of followers label##other)You have %d followers." = "You have %d followers.";

Again, this file can be automatically generated with spgenstrings. If you don't have a strings file yet, the default value will be the given key (in this case You have %d followers.).

If you look closely, for one key and context you need 2 strings: one when you have 1 follower (with the ##one suffix in the context), another one for the rest of cases (with the ##other suffix in the context). An example would be:

"(Number of followers label##one)You have %d followers." = "You have just one follower.";
"(Number of followers label##other)You have %d followers." = "You have %d followers.";

Install spgenstrings

Open the spgenstrings.xcodeproj project with Xcode
Click on Product > Archive
In the Organizer > Archives, you'll se the list of archives of spgenstrings. Right-click the most recent one and select Show in Finder.
Right-click on the xcarchive file and click on Show Package Contents.
Finally go into Products/usr/local/bin and there you'll find the spgenstrings executable file.

Place that file wherever you need it :)

Usage of spgenstrings

spgenstrings is a command line tool. It's based on genstrings2 (an open source implementation of genstrings by Cocoanetics), so it shares most of the options with the original genstrings.

The most common way to use it is:

spgenstrings -deleteUnusedEntries -deleteUnusedTables -o <output dir> <source files to process...>

The -deleteUnusedEntries and -deleteUnusedTables options removes old entries and strings files that are not referenced anymore in your source code.

Contact

SPLocalizedString was created by Sergio Padrino: @sergiou87, based on the work of Cocoanetics on DTLocalizableStringScanner.

Contributing

If you want to contribute to the project just follow this steps:

Fork the repository.
Clone your fork to your local machine.
Create your feature branch.
Commit your changes, push to your fork and submit a pull request.

Apps using SPLocalizedString and spgenstrings

Contributions

Daniel Martín: Add support for non-literal strings (#2).
James Clarke: Allow opting out of the context-prefixing behaviour (#3).

License

SPLocalizedString is available under the MIT license. See the LICENSE file for more info.

License

plexinc/SPLocalizedString

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