//循環(huán)方法
///核心思想是找到相同字符串就對字符串進(jìn)行截取，然后對剩余字符串進(jìn)行

• (NSInteger)getCountFrom:(NSString)allStr with:(NSString)cutStr{
  //空的時候直接返回0
  if (allStr.length == 0) {
  return 0;
  }
  //接下來是處理字符串
  NSString *leftStr = allStr;
  NSInteger includeCount = 0;
  //顯得我嚴(yán)謹(jǐn)，其實(shí)這里循環(huán)條件無所謂
  while (leftStr.length >= cutStr.length) {
  NSRange range = [leftStr rangeOfString:cutStr];
  if (range.location != NSNotFound) {
  includeCount += 1;
  leftStr = [leftStr substringFromIndex:range.location + range.length];
  }else{
  return includeCount;
  }
  }
  return includeCount;
  }

//遞歸方法
///核心思想是找到相同字符串就對字符串進(jìn)行截取，然后對剩余字符串進(jìn)行

• (NSInteger)getCountFrom1:(NSString)allStr with:(NSString)cutStr{
  static NSInteger includeCount = 0;
  //直接處理字符串
  if (allStr.length < cutStr.length) {
  return includeCount;
  }
  NSRange range = [allStr rangeOfString:cutStr];
  if (range.location != NSNotFound) {
  includeCount += 1;
  [self getCountFrom1:[allStr substringFromIndex:range.location + range.length] with:cutStr];
  }else{
  return includeCount;
  }
  return includeCount;
  }