处理、获取两个字符串之间的字符串

处理、获取两个字符串之间的字符串：

//字符串匹配
- (NSArray *)stringMatcher:(NSString *)matchStr string:(NSString *)str{//在str中搜索matchStr并返回matchStr下标NSInteger matchStrLehgth = matchStr.length;NSInteger strLength = str.length;NSMutableArray *indexArray = [[NSMutableArray alloc]init];for (int index = 0; index <= (strLength - matchStrLehgth); index ++) {NSRange range = {index,matchStr.length};if ([matchStr isEqualToString:[str substringWithRange:range]]) {[indexArray addObject:[NSString stringWithFormat:@"%d",index]];}}return [NSArray arrayWithArray:indexArray];
}//处理所有两个字符串中间的子串
- (NSMutableAttributedString *)findSubString:(NSString *)string beginStr:(NSString *)beginStr endStr:(NSString *)endStr{NSMutableAttributedString *attributed = [[NSMutableAttributedString alloc] initWithString:string];NSDictionary *dic = @{NSFontAttributeName : [UIFont fontWithName:FontTypePingFangMe size:16]};NSArray<NSString *> *indexArray = [self stringMatcher:beginStr string:string];for (NSString *str in indexArray) {int index = [str intValue];NSString *str = [string substringFromIndex:index + beginStr.length];NSArray<NSString *> *endArray = [self stringMatcher:endStr string:str];if (endArray.count == 0) {return nil;}else{int endIndex = [endArray[0] intValue];NSRange range = {index + beginStr.length,(endIndex + index + beginStr.length) - (index + beginStr.length)};[attributed addAttributes:dic range:range];}}return attributed;
}

使用：

NSString *priceStr = @"拼团价¥888.88-¥999.99";
NSMutableAttributedString *attr = [self findSubString:priceStr beginStr:@"¥" endStr:@"."];
if (attr) {self.priceLabel.attributedText = attr;
}else{self.priceLabel.text = priceStr;
}

实现效果：