使本地化字串的一部分變為粗體swift

我有一個字串，假設“我的名字是 %@，我在 %@ 班學習”現在我想將要插入的占位符文本加粗，以便結果看起來像這樣：“我的名字是Harsh和我在第10班學習“我會在標簽上顯示

我已經嘗試過使用 NSAttributedString 但由于字串將被本地化，我無法使用屬性字串的范圍引數使其變為粗體。

uj5u.com熱心網友回復：

這應該有效：

• 使用占位符獲取本地化字串
• 查找該字串中占位符的位置（您可能需要編號的占位符）
• 確定將替換占位符的值的長度
• 通過替換占位符展開字串
• 計算擴展字串中值的范圍
• 加粗

uj5u.com熱心網友回復：

我可以提供一個解決方案，NSRegularExpression盡管它確實不使用任何復雜的運算式。

這些步驟與上面發布的含義非常接近

1. 將要注入的字串（Harsh，13）等存盤在陣列中
2. 有一個包含占位符的本地化字串
3. 使用 REGEX 查找占位符的位置并將這些位置存盤在locations array
4. 通過將占位符替換為字串陣列中的值來更新本地化字串
5. NSMutableAttributedString從更新的本地化字串創建
6. 回圈遍歷字串以注入陣列并更新NSMutableAttributedString由locations array

這是我用一些注釋來解釋的代碼：

// This is not needed, just part of my UI
// Only the inject part is relevant to you
@objc
private func didTapSubmitButton()
{
    if let inputText = textField.text
    {
        let input = inputText.components(separatedBy: ",")
        let text = "My name is %@ and I am %@ years old"
        inject(input, into: text)
    }
}

// The actual function
private func inject(_ strings: [String],
                    into text: String)
{
    let placeholderString = "%@"
    
    // Store all the positions of the %@ in the string
    var placeholderIndexes: [Int] = []
    
    // Locate the %@ in the original text
    do
    {
        let regex = try NSRegularExpression(pattern: placeholderString,
                                            options: .caseInsensitive)
        
        // Loop through all the %@ found and store their locations
        for match in regex.matches(in: text,
                                   options: NSRegularExpression.MatchingOptions(),
                                   range: NSRange(location: 0,
                                                  length: text.count))
            as [NSTextCheckingResult]
        {
            // Append your placeholder array with the location
            placeholderIndexes.append(match.range.location)
        }
    }
    catch
    {
        // handle errors
        print("error")
    }
    
    // Expand your string by inserting the parameters
    let updatedText = String(format: text, arguments: strings)
    
    // Configure an NSMutableAttributedString with the updated text
    let attributedText = NSMutableAttributedString(string: updatedText)
    
        // Keep track of an offset
    // Initially when you store the locations of the %@ in the text
    // My name is %@ and my age is %@ years old, the location is 11 and 27
    // But when you add Harsh, the next location should be increased by
    // the difference in length between the placeholder and the previous
    // string to get the right location of the second parameter
    var offset = 0
    
    // Loop through the strings you want to insert
    for (index, parameter) in strings.enumerated()
    {
        // Get the corresponding location of where it was inserted
        // Plus the offset as discussed above
        let locationOfString = placeholderIndexes[index]   offset
        
        // Get the length of the string
        let stringLength = parameter.count
        
        // Create a range
        let range = NSRange(location: locationOfString,
                            length: stringLength)
        
        // Set the bold font
        let boldFont
            = UIFont.boldSystemFont(ofSize: displayLabel.font.pointSize)
        
        // Set the attributes for the given range
        attributedText.addAttribute(NSAttributedString.Key.font,
                                    value: boldFont,
                                    range: range)
        
        // Update the offset as discussed above
        offset = stringLength - placeholderString.count
    }
    
    // Do what you want with the string
    displayLabel.attributedText = attributedText
}

最終結果：

這應該足夠靈活，可以處理字串中存在的任意數量的占位符，并且您不需要跟蹤不同的占位符。

uj5u.com熱心網友回復：

let descriptionString = String(format: "localised_key".localized(), Harsh, 10)
let description = NSMutableAttributedString(string: descriptionString, attributes: [NSAttributedString.Key.font: UIFont(name: "NotoSans-Regular", size: 15.7)!, NSAttributedString.Key.foregroundColor: UIColor(rgb: 0x000b38), NSAttributedString.Key.kern: 0.5])
let rangeName = descriptionString.range(of: "Harsh")
let rangeClass = descriptionString.range(of: "10")
let nsrangeName = NSRange(rangeName!, in: descriptionString)
let nsrangeClass = NSRange(rangeClass!, in: descriptionString)
description.addAttributes([NSAttributedString.Key.font: UIFont(name: "NotoSans-Bold", size: 15.7)!, NSAttributedString.Key.foregroundColor: UIColor(rgb: 0x000b38), NSAttributedString.Key.kern: 0.5], range: nsrangeName)
description.addAttributes([NSAttributedString.Key.font: UIFont(name: "NotoSans-Bold", size: 15.7)!, NSAttributedString.Key.foregroundColor: UIColor(rgb: 0x000b38), NSAttributedString.Key.kern: 0.5], range: nsrangeClass)

如需更多參考，請使用此

標籤：IOS 迅速

上一篇：修剪SVG的額外空間而不改變其大小

下一篇：在swiftui中結合Date只得到一個Date