问题
I want to implement storyboard localization in swift language. (means I want to localization for fix label and button text)
I have already idea about NSLocalizedString but I dont want to code for fix text Label
for e.g
NSLocalizedString("Welcome", comment: "")
I have already add Localizable.strings file as well as Main.string file for particular language. but I can not success in implement Localization
回答1:
Bhumesh
I have used this library for in - app localisation. Which is very easy to use.
https://github.com/marmelroy/Localize-Swift
Now For Storyboard support I have Created Following extension that is IBDesignable So you can easily provide localised text from storyboard itself
1 ) Add This into new swift file
import Localize_Swift
@IBDesignable class LocalizableLabel: UILabel {
@IBInspectable var table :String? // Table
@IBInspectable var key:String? // KEY
@IBInspectable var extraTextToAppend:String? // Some text need to append , if any
override func awakeFromNib() {
guard let key = key else {return}
self.text = key.localized(using: table)
NotificationCenter.default.addObserver(self, selector: #selector(setText), name: NSNotification.Name(LCLLanguageChangeNotification), object: nil)
if let extraText = self.extraTextToAppend, let text = self.text {
self.text = text + extraText
}
}
@objc func setText () {
guard let key = key else {return}
self.text = key.localized(using: table)
if let extraText = self.extraTextToAppend, let text = self.text {
self.text = text + extraText
}
}
}
@IBDesignable class LocalizableButton: UIButton {
@IBInspectable var table :String?
@IBInspectable var key:String?
override func awakeFromNib() {
guard let key = key else {return}
self.setTitle(key.localized(using: table), for: .normal)
if let attributedText = self.attributedTitle(for: .normal) {
let mutableAttributedText = NSMutableAttributedString(attributedString: attributedText)
mutableAttributedText.replaceCharacters(in: NSMakeRange(0, mutableAttributedText.length), with: key.localized(using: table))
self.setAttributedTitle(mutableAttributedText, for: .normal)
}
NotificationCenter.default.addObserver(self, selector: #selector(setText), name: NSNotification.Name(LCLLanguageChangeNotification), object: nil)
}
@objc func setText () {
guard let key = key else {return}
self.setTitle(key.localized(using: table), for: .normal)
if let attributedText = self.attributedTitle(for: .normal) {
let mutableAttributedText = NSMutableAttributedString(attributedString: attributedText)
mutableAttributedText.replaceCharacters(in: NSMakeRange(0, mutableAttributedText.length), with: key.localized(using: table))
self.setAttributedTitle(mutableAttributedText, for: .normal)
}
}
}
@IBDesignable class LocalizeUINavigationItem: UINavigationItem {
@IBInspectable var table :String?
@IBInspectable var key:String?
override func awakeFromNib() {
guard let key = key else {return}
self.title = key.localized(using: table)
NotificationCenter.default.addObserver(self, selector: #selector(setText), name: NSNotification.Name(LCLLanguageChangeNotification), object: nil)
}
@objc func setText () {
guard let key = key else {return}
self.title = key.localized(using: table)
}
}
@IBDesignable class LocalizableUITextField: UITextField {
@IBInspectable var table_placeholder :String?
@IBInspectable var key_place_holder:String?
override func awakeFromNib() {
guard let key = key_place_holder else {return}
self.placeholder = key.localized(using: table_placeholder)
NotificationCenter.default.addObserver(self, selector: #selector(setText), name: NSNotification.Name(LCLLanguageChangeNotification), object: nil)
}
@objc func setText () {
guard let key = key_place_holder else {return}
self.placeholder = key.localized(using: table_placeholder)
}
}
2) Goto Storyboard set class to label and provide the key
3) Run and test
回答2:
Follow below steps to localize Storyboard Elements:
- Click on your project.
- In Localizations section click on + icon and add language that you want to localize.
- Once you add language you will see String file of that language.
- Go to storyboard and click on UI Element that you want to localize.
- Select identity inspector, In Document portion you will see Object ID that we need to use for localize that element.
- Now goto localization file that created from step 3.
- In that string file you will see Object ID of elements. Change value of that Object ID key it will reflect to that particular language only.
回答3:
Once you have your localisation running, you can add extensions for UI elements, introducing easy localisation for them.
For UIlabel it will looks something like this:
public extension UILabel {
@IBInspectable public var localizedText: String? {
get {
return text
}
set {
text = NSLocalizedString(newValue ?? "", comment: "")
}
}
}
The @IBInspectable allows you setting the localisation key either from the storyboard and programatically too.
The storyboard localisation is the Apple provided way, but it bugs me a lot - not the most programmer-friendly for sure.
回答4:
class ViewController: UIViewController {
@IBOutlet weak var resetOutlet: MyButton! {
didSet {
resetOutlet.setTitle("RESET".localized().uppercased(), for: .normal)
}
}
}
extension String {
func localized(tableName: String = "Localizable") -> String {
if let languageCode = Locale.current.languageCode, let preferredLanguagesFirst = Locale.preferredLanguages.first?.prefix(2) {
if languageCode != preferredLanguagesFirst {
if let path = Bundle.main.path(forResource: "en", ofType: "lproj") {
let bundle = Bundle.init(path: path)
return NSLocalizedString(self, tableName: tableName, bundle: bundle!, value: self, comment: "")
}
}
}
return NSLocalizedString(self, tableName: tableName, value: self, comment: "")
}
}
来源：https://stackoverflow.com/questions/51018376/storyboard-localization-in-swift-4-0