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;
}
}
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