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iOS实现截取字符串中汉字功能

iOS实现截取字符串中汉字功能

作者: 江河_ios | 来源:发表于2021-11-26 15:49 被阅读0次
  • (void)setContent:(NSString *)content
    {
    NSArray *array=[content componentsSeparatedByString:@"&"];
    NSMutableString *string=[NSMutableString new];
    for (int i = 0; i < array.count; i++) {
    NSString *chineseStr = [self getChineseStringWithString:array[i]];
    if (chineseStr.length>0) {
    [string appendString:chineseStr];
    [string appendString:@";"];
    }
    }
    _content = string;
    }
  • (NSString *)getChineseStringWithString:(NSString *)string
    {
    //(unicode中文编码范围是0x4e00~0x9fa5)
    for (int i = 0; i < string.length; i++) {
    int utfCode = 0;
    void *buffer = &utfCode;
    NSRange range = NSMakeRange(i, 1);
    BOOL b = [string getBytes:buffer maxLength:2 usedLength:NULL encoding:NSUTF16LittleEndianStringEncoding options:NSStringEncodingConversionExternalRepresentation range:range remainingRange:NULL];
    if (b && (utfCode >= 0x4e00 && utfCode <= 0x9fa5)) {
    return [string substringFromIndex:i];
    }
    }
    return nil;
    }

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