ios - 将表情符号从 JSON 字符串转换为字符

Question

我正在尝试将表情符号编码字符串从 JSON 字符串转换为字符。有些表情符号正在转换，有些则没有。

我正在使用的功能:

extension String {
var decodeEmoji: String? {
    let data = self.data(using: String.Encoding.utf8)
    let decodedStr = NSString(data: data!, encoding: String.Encoding.nonLossyASCII.rawValue)
    if decodedStr != nil {
        return decodedStr as String?
    }
    return self
    }
}


JSON string: Altre novità in arrivo oggi...  \ud83d\udcaa\ud83c\udffb

“\ud83d\udcaa\ud83c\udffb”是💪🏻字符的表情符号字符串。

Answer 1

查看此answer或者为了显示情绪，您可以使用 NSAttributedString

NSAttributedString * attrStr = [[NSAttributedString alloc] initWithData:[text dataUsingEncoding:NSUnicodeStringEncoding] options:@{ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType } documentAttributes:nil error:nil];

例如，为 UILabel 创建扩展

@implementation UILabel (Emotion)

- (void)setHtmlText:(NSString *)text
{
    self.text = text;

    NSDictionary *attributes = [self.attributedText attributesAtIndex:0 longestEffectiveRange:nil inRange:NSMakeRange(0, self.attributedText.length)];

    NSMutableAttributedString * attrStr = [[NSMutableAttributedString alloc] initWithData:[text dataUsingEncoding:NSUnicodeStringEncoding] options:@{ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType } documentAttributes:nil error:nil];

    [attrStr addAttributes:attributes range:NSMakeRange(0, attrStr.length)];

    self.attributedText = attrStr;
}

@end