匹配字符串的关键字并修改颜色

关键字数组：

- (NSAttributedString *)colorAttributeString:(NSString *)sourceString sourceSringColor:(UIColor *)sourceColor sourceFont:(UIFont *)sourceFont keyWordArray:(NSArray *)keyWordArray keyWordColor:(UIColor *)keyWordColor keyWordFont:(UIFont *)keyWordFont{
    if (sourceString == nil || ![sourceString isKindOfClass:[NSString class]]) {
        sourceString = @"";
    }
    NSMutableArray *muKeyWordsArr;
    if (keyWordArray == nil) {
        muKeyWordsArr = [NSMutableArray arrayWithCapacity:0];
    }else{
        muKeyWordsArr = keyWordArray.mutableCopy;
    }
    if (sourceColor == nil) {
        sourceColor = [UIColor blackColor];
    }
    if (keyWordColor == nil) {
        keyWordColor = [UIColor blackColor];
    }
    if (sourceFont == nil) {
        sourceFont = [UIFont systemFontOfSize:15];
    }
    if (keyWordFont == nil) {
        keyWordFont = [UIFont systemFontOfSize:15];
    }
    NSMutableAttributedString *attributeContent;
    NSMutableParagraphStyle *ps = [[NSMutableParagraphStyle defaultParagraphStyle] mutableCopy];
    [ps setLineBreakMode:NSLineBreakByTruncatingTail];
    NSDictionary *attriDic = @{NSFontAttributeName : sourceFont,NSForegroundColorAttributeName : sourceColor,NSParagraphStyleAttributeName : ps};
    attributeContent = [[NSMutableAttributedString alloc] initWithString:sourceString attributes:attriDic];
    [muKeyWordsArr enumerateObjectsUsingBlock:^(id  _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
        NSString *searchKey = (NSString *)obj;
        NSError *error = nil;
        NSRegularExpression *expression = [NSRegularExpression regularExpressionWithPattern:searchKey options:NSRegularExpressionCaseInsensitive error:&error];
        if (!expression) {
        }else{
            [expression enumerateMatchesInString:sourceString options:NSMatchingReportProgress range:NSMakeRange(0, sourceString.length) usingBlock:^(NSTextCheckingResult *result, NSMatchingFlags flags, BOOL *stop) {
                [attributeContent addAttributes:@{NSFontAttributeName : keyWordFont,NSForegroundColorAttributeName:keyWordColor} range:result.range];
            } ];
        }
    }];
    return attributeContent;
}

调用：

- (void)colorText{
    UILabel *label = [UILabel new];
    label.backgroundColor = [UIColor clearColor];
    label.numberOfLines = 0;
    [self.view addSubview:label];
    [label mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.equalTo(self.view).offset(15);
        make.right.equalTo(self.view).offset(-15);
        make.centerY.equalTo(self.view);
    }];
    
    NSString *source = @"1、你是东西，我是南北，我们只要在一起就好了 ----烽火戏诸侯\n2、情到深处，知悔不愿悔。 ----烽火戏诸侯\n3、食君之禄，忠君之事，两不相欠。我张巨鹿最后跟天下百姓无非是要了一壶酒喝，不算多吧？ ----烽火戏诸侯\n4、世间人，纵有不舍，终有离别。世间事，纵有遗憾，且放心间。 ----烽火戏诸侯\n5、提壶绿蚁酒。\n倒酒在棋盘。倒尽了壶中绿蚁，独处一室的徐凤年泪流满面，哽咽道：“师父，你让我以后带酒给谁喝？” ----徐凤年\n6、独走独停独自坐，手上青蛇掠白线。独人独衫独自剑，剑尖锋芒生三千。世间无人能识我，只是冷眼笑疯癫。唯有山鬼与龙王，知是神仙在眼前。 ----烽火戏诸侯\n7、既说用人不疑疑人不用。又说防人之心不可无。反正天底下的道理都给说光了，但道理太多，也就其实等于没说。 ----烽火戏诸侯\n8、我有四十年郁气出不得。\n";
    NSArray *array = [NSArray arrayWithObjects:@"烽火",@"徐凤年", nil];
    NSAttributedString *attri2 = [self colorAttributeString:source sourceSringColor:[UIColor blackColor] sourceFont:[UIFont systemFontOfSize:15] keyWordArray:array keyWordColor:[UIColor orangeColor] keyWordFont:[UIFont systemFontOfSize:20]];
    label.attributedText = attri2;
}

显示效果：

IMG_2037.PNG