NSString查找正则表达式并将其替换为图像(NSMutableAttributeString)

显然我解决了。for中有一个代码,用于将子字符串替换为 NSMutableAttributedString 。我还决定把 for 灵感来源于类似(但不同)的问题的先前答案

NSMutableAttributedString *formattedText = myString.mutableAttributedString;

// Look for image
NSString *regEx = @"([a-z])+(?:([0-9])+){0,1}.png";
NSError *error = nil;
NSRegularExpression *regex = [NSRegularExpression
                              regularExpressionWithPattern:regEx
                              options:NSRegularExpressionCaseInsensitive error:&error];
if(error != nil){
    NSLog(@"Error: %@",error);
} else{
    NSArray *matches = [regex matchesInString:myString
                                      options:kNilOptions
                                        range:NSMakeRange(0, myString.length)];
    for (NSTextCheckingResult *result in [matches reverseObjectEnumerator])
    {
        NSString *insideString = [myString substringWithRange:[result rangeAtIndex:0]];
        UIImage *image = [UIImage imageNamed:insideString];
        NSTextAttachment *imageAttachment = [NSTextAttachment new];
        imageAttachment.image = image;
        NSAttributedString *replacementForTemplate = [NSAttributedString attributedStringWithAttachment:imageAttachment];
        [formattedText replaceCharactersInRange:result.range
                           withAttributedString:replacementForTemplate];

        NSLog(@"found! -> %@", insideString);

    }
}

相反 mutableAttributedString 属性属于NSString类别。这是它的代码

- (NSMutableAttributedString *)mutableAttributedString {
    return [[NSMutableAttributedString alloc] initWithString:self];
}