对象未在 iphone 中释放

Question

 NSString *strSql = @"select tblrecentsearch_id,xmlrequest,company,postcode,city,kilometer,date from tblrecentsearch";

 returnValue = sqlite3_prepare_v2(database, [strSql UTF8String], -1, &selectStatement, NULL);
 if(returnValue == SQLITE_OK)
 {
  arrRecentSearch=[[NSMutableArray alloc] init];

  while(sqlite3_step(selectStatement)==SQLITE_ROW)
  {
   Search *ObjSearch = [[Search alloc]init];
   ObjSearch.intRecentSearchId = sqlite3_column_int(selectStatement, 0);
   ObjSearch.xmlRequest = [NSString stringWithCString:(char  *)sqlite3_column_text_check(selectStatement, 1) encoding:NSUTF8StringEncoding];
   ObjSearch.strCompnay=[NSString stringWithCString:(char  *)sqlite3_column_text_check(selectStatement, 2) encoding:NSUTF8StringEncoding];
   ObjSearch.strPostCode=[NSString stringWithCString:(char  *)sqlite3_column_text_check(selectStatement, 3) encoding:NSUTF8StringEncoding];
   ObjSearch.strPlace = [NSString stringWithCString:(char  *)sqlite3_column_text_check(selectStatement, 4) encoding:NSUTF8StringEncoding];
   ObjSearch.strKilometer = [NSString stringWithCString:(char  *)sqlite3_column_text_check(selectStatement, 5) encoding:NSUTF8StringEncoding];
   ObjSearch.strDate = [NSString stringWithCString:(char  *)sqlite3_column_text_check(selectStatement, 6) encoding:NSUTF8StringEncoding];

   [arrRecentSearch addObject:ObjSearch];

   [ObjSearch release];
  }
 }

 sqlite3_finalize(selectStatement);

我想释放 arrRecentSearch 但它会从函数返回。我怎样才能了解这个数组。请帮助我。我正在从数据库中获取数据。

Answer 1

只是自动释放它：

return [arrRecentSearch autorelease];

查看apple memopry management guidelines 了解有关其工作原理的更多信息

如果您要返回一个自动释放的对象，您必须记住保留它，以便以后保留它。即，如果我们有一个返回自动释放数组的函数

- (NSArray *) getSearchResults {
    return [[[NSArray alloc] init] autorelease];
}

如果您想记住搜索结果以备后用，您必须记住这样做：

...
NSArray *results = [[self getSearchResults] retain]; //!< Remember the retain here!
...

或者，您可以使用属性来存储它：

@property (nonatomic, copy) NSArray *searchResults;

...
self.searchResults = [self getSearchResults]; //!< The property handles the retain for you here
...

不管怎样，如果你只是让它自动释放，它就会消失并且你会得到一个异常！

编辑：刚刚意识到 MustISignUp 在评论中回答了这个问题！