美文网首页
iOS 字符串前后插入图片,指定字符后插入图片

iOS 字符串前后插入图片,指定字符后插入图片

作者: 最强的小强 | 来源:发表于2022-08-08 14:26 被阅读0次

    一、字符串前(后)插入图片

    标题头插入图片.jpg
        //  利用 `NSTextAttachment` 生成图片再转化为可变字符串
        NSTextAttachment *attch = [[NSTextAttachment alloc] init];
        attch.image = [UIImage imageNamed:@"allresponse_title"];
        attch.bounds = CGRectMake(0, 0, attch.image.size.width, attch.image.size.height);
        NSMutableAttributedString *result = [[NSMutableAttributedString alloc] initWithString:[NSString stringWithFormat:@" %@",channelModel.title]];
        NSAttributedString *b_string = [NSAttributedString attributedStringWithAttachment:attch];
        [result insertAttributedString:b_string atIndex:0];
        self.titleLabel.attributedText = result;
    

    二、关键字命中字符串显示高亮并插入图片

    指定字符后插入图片.png
    // 关键词高亮显示
    
    - (void)setHighLightWordWithModel:(WEShareholderModel *)model {
        // 插入多个关键字
        if ([self.correlationCompanyArr isKindOfClass:[NSArray class]] && self.correlationCompanyArr.count > 0) {
            NSMutableArray *tempArray = [[NSMutableArray alloc] init];
            NSMutableArray *highWordArray = [[NSMutableArray alloc] init];
            // 1. 寻找关键词位置
            for (WECompanyModel *mm in self.correlationCompanyArr) {
                NSString *highword = mm.name;
                if ([mm.keywords isKindOfClass:[NSString class]] && [mm.keywords isNoEmpty]) {
                    highword = mm.keywords;
                }
                [highWordArray addObject:highword];
                if ([highword isKindOfClass:[NSString class]] && [model.content containsString:highword]) {
                    NSMutableAttributedString *title = [[NSMutableAttributedString alloc]initWithString:model.content];
                    NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:highword options:0 error:nil];
                    NSArray *matches = [regex matchesInString:model.content options:0 range:NSMakeRange(0, model.content.length)];
                    // 只显示一次
                    if ([matches isKindOfClass:[NSArray class]] && matches.count > 0) {
                        matches = [matches subarrayWithRange:NSMakeRange(0, 1)];
                    }
                    for(NSTextCheckingResult *result in [matches objectEnumerator]){
                        NSRange matchRange = [result range];
                        [tempArray addObject:[NSValue valueWithRange:matchRange]];
                    }
                }
            }
            if (tempArray.count == 0) { // 无匹配企业
                NSMutableAttributedString *attrText = [[NSMutableAttributedString alloc] initWithString:model.content];
                [attrText addAttribute:NSFontAttributeName value:kFontPingFangRegular(19) range:NSMakeRange(0, attrText.string.length)];
                if (self.keyword) { // 有关键词,匹配关键词高亮
                    NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:self.keyword options:0 error:nil];
                    NSArray *matches = [regex matchesInString:model.content options:0 range:NSMakeRange(0, model.content.length)];
                    for(NSTextCheckingResult *result in [matches objectEnumerator]){
                        NSRange matchRange = [result range];
                        [attrText setColor:kAssistNewColor range:matchRange];
                    }
                }
                self.detailLabel.attributedText = attrText;
            } else {
                // 2.根据关键词位置,插入图片
                int i = 0;
                NSMutableAttributedString *title = [[NSMutableAttributedString alloc]initWithString:model.content];
                [title addAttribute:NSFontAttributeName value:kFontPingFangRegular(19) range:NSMakeRange(0, title.string.length)];
                NSArray *sortArray = [tempArray sortedArrayUsingComparator:^NSComparisonResult(id _Nonnull obj1, id _Nonnull obj2) {
                    if ([obj1 isKindOfClass:[NSValue class]] && [obj2 isKindOfClass:[NSValue class]]) {
                        NSValue *value1 = obj1;
                        NSValue *value2 = obj2;
                        NSRange range1 = [value1 rangeValue];
                        NSRange range2 = [value2 rangeValue];
                        return (range1.location < range2.location ? NSOrderedDescending : NSOrderedAscending);
                    }
                    return NSOrderedAscending;
                }];
                // 2.1从后往前插入,就不会影响前面获取的位置坐标
                for (NSValue *value in sortArray) {
                    NSRange range = [value rangeValue];
                    NSTextAttachment *attachment = [[NSTextAttachment alloc] init];
                    attachment.image = [UIImage imageNamed:@"icon-company"];
                    attachment.bounds = CGRectMake(2, 0, 17.5, 15);
                    NSAttributedString *imageAttachment = [NSAttributedString attachmentStringWithContent:attachment.image contentMode:UIViewContentModeScaleAspectFit attachmentSize:attachment.bounds.size alignToFont:title.font alignment:YYTextVerticalAlignmentTop];
                    [title insertAttributedString:imageAttachment atIndex:range.location+range.length];
                    i++;
                }
                // 3.全部完成后,给关键词高亮,添加点击事件 (如果在之前设置高亮,位置会偏移)
                for (WECompanyModel *mm in self.correlationCompanyArr) {
                    NSString *highword = mm.name;
                    if ([mm.keywords isKindOfClass:[NSString class]] && [mm.keywords isNoEmpty]) {
                        highword = mm.keywords;
                    }
                    if ([highword isKindOfClass:[NSString class]] && [title.string containsString:highword]) {
                        NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:highword options:0 error:nil];
                        NSArray *matches = [regex matchesInString:title.string options:0 range:NSMakeRange(0, title.string.length)];
                        if ([matches isKindOfClass:[NSArray class]] && matches.count > 0) {
                            matches = [matches subarrayWithRange:NSMakeRange(0, 1)];
                        }
                        for(NSTextCheckingResult *result in [matches objectEnumerator]){
                            NSRange matchRange = [result range];
                            [title setTextHighlightRange:matchRange color:kAssistSubColor backgroundColor:[UIColor clearColor] tapAction:^(UIView * _Nonnull containerView, NSAttributedString * _Nonnull text, NSRange range, CGRect rect) {
                                [self companyBtnOnClickWithModel:mm];
                            }];
                        }
                    }
                    if (self.keyword) { // 有关键词,匹配关键词高亮
                        NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:self.keyword options:0 error:nil];
                        NSArray *matches = [regex matchesInString:title.string options:0 range:NSMakeRange(0, title.string.length)];
                        for(NSTextCheckingResult *result in [matches objectEnumerator]){
                            NSRange matchRange = [result range];
                            [title setColor:kAssistNewColor range:matchRange];
                        }
                    }
                }
                self.detailLabel.attributedText = title;
            }
            
        } else {
            NSMutableAttributedString *attrText = [[NSMutableAttributedString alloc] initWithString:model.content];
            [attrText addAttribute:NSFontAttributeName value:kFontPingFangRegular(19) range:NSMakeRange(0, attrText.string.length)];
            if (self.keyword) { // 有关键词,匹配关键词高亮
                NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:self.keyword options:0 error:nil];
                NSArray *matches = [regex matchesInString:model.content options:0 range:NSMakeRange(0, model.content.length)];
                for(NSTextCheckingResult *result in [matches objectEnumerator]){
                    NSRange matchRange = [result range];
                    [attrText setColor:kAssistNewColor range:matchRange];
                }
            }
            self.detailLabel.attributedText = attrText;
        }
    }
    
    

    相关文章

      网友评论

          本文标题:iOS 字符串前后插入图片,指定字符后插入图片

          本文链接:https://www.haomeiwen.com/subject/ziuwwrtx.html