获取字符串中的所有xxx的所有的index

pragma mark - 获取这个字符串中的所有xxx的所在的index

• (NSMutableArray *)getRangeStr:(NSString *)text findText:(NSString *)findText {
  NSMutableArray *arrayRanges = [NSMutableArray arrayWithCapacity:3];
  if (findText == nil && [findText isEqualToString:@""]){
  return nil;
  }
  NSRange rang = [text rangeOfString:findText]; //获取第一次出现的range
  if (rang.location != NSNotFound && rang.length != 0){
  [arrayRanges addObject:[NSNumber numberWithInteger:rang.location]];//将第一次的加入到数组中
  NSRange rang1 = {0,0};
  NSInteger location = 0;
  NSInteger length = 0;
  for (int i = 0;; i++){
  if (0 == i) {
  location = rang.location + rang.length;
  length = text.length - rang.location - rang.length;
  rang1 = NSMakeRange(location, length);
  }else{
  location = rang1.location + rang1.length;
  length = text.length - rang1.location - rang1.length;
  rang1 = NSMakeRange(location, length);
  }
  //在一个range范围内查找另一个字符串的range
  rang1 = [text rangeOfString:findText options:NSCaseInsensitiveSearch range:rang1];
  if (rang1.location == NSNotFound && rang1.length == 0){
  break;
  }else//添加符合条件的location进数组
  [arrayRanges addObject:[NSNumber numberWithInteger:rang1.location]];
  }
  return arrayRanges;
  }
  return nil;
  }