如何找出我在搜索过程中点击了哪些UITableViewCell？

Question

我有一个表格视图与搜索栏设置。一切都很好：当我在搜索栏中输入文本时，结果将根据我的搜索文本在表格视图中更新。我遇到的问题是在确定表格单元的ID是什么时候传递给我的细节视图。澄清：表视图中的单元格通常从SQLite3数据库生成并按其名称排序。所以如果我有4个单元格：（Cabernet Cortis，Cabernet Franc，Cabernet Sauvignon和Ruby Cabernet），他们的ID通常是（78,79,80,378）。然而，当我搜索“赤霞珠”，并且这四个项目出现时，indexPath.row是（1，2，3，4）而不是（78,79,80,378），所以它将我带到错误的葡萄中详细视图（这是按照输入到我的数据库中的顺序排列的前四个葡萄）。

下面是一些代码，以帮助清理事情。我认为，如果我可以获得每个出现搜索结果的葡萄的ID并且具有这些值的MSMutableArray，那么将会有所帮助，然后使用[actualIDNumber objectAtIndex:indexPath.row]而不仅仅是indexPath.row。

//ViewGrapesViewController.h 
@property (strong, nonatomic) IBOutlet UISearchBar *searchBar; 
- (void) searchGrapesTableView; 
@property (nonatomic, retain) NSMutableArray *listOfGrapes; 
@property (nonatomic, retain) NSMutableArray *searchResult; 
@property (nonatomic, retain) NSMutableArray *searchResultID; 
@property (nonatomic) Boolean isSearchOn; 

//ViewGrapesViewController.m 
//synthesize variables, etc 
- (void)viewDidLoad 
    { 
     //obtain grapes from the DB, etc. 
     //add searchNames to an NSMutableArray 
     listOfGrapes = [[NSMutableArray alloc] init]; 
     for (int i=1; i<=[self.grapes count]; i++) { 
      Grapes *theGrape = [self.grapes objectAtIndex:(i-1)]; 
      NSString *grapeSearchName = theGrape.searchName; 
      [listOfGrapes addObject:grapeSearchName]; 
     } 
     searchResult = [[NSMutableArray alloc] init]; 
     searchResultID = [[NSMutableArray alloc] init]; 
     isSearchOn = NO; 

    //search bar stuff 
    searchBar.autocorrectionType = UITextAutocorrectionTypeNo; 

    [super viewDidLoad]; 
} 

- (void) searchBarTextDidBeginEditing:(UISearchBar *)searchBar { 
    isSearchOn = YES; 
} 

- (void) searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText { 
    if ([searchText length] > 0) { 
     isSearchOn = YES; 
     [self searchGrapesTableView]; 
    } 
    else { 
     isSearchOn = NO; 
    } 
    [self.tableView reloadData]; 
} 

- (void) searchGrapesTableView { 
    [searchResult removeAllObjects]; 
    [searchResultID removeAllObjects]; 
    for (NSString *str in listOfGrapes) 
    { 
     NSRange titleResultsRange = [str rangeOfString:searchBar.text options:NSCaseInsensitiveSearch]; 
     if (titleResultsRange.length > 0) { 
      [searchResult addObject:str]; 
      //would love to add ID to searchResultID array here, don't know how to do that 
     } 
    } 
} 

- (void) searchBarSearchButtonClicked:(UISearchBar *)searchBar { 
    [self searchGrapesTableView]; 
} 

- (void) searchBarTextDidEndEditing:(UISearchBar *)searchBar { 
    isSearchOn = NO; 
    [self.searchBar resignFirstResponder]; 
    [self.tableView reloadData]; 
} 

//table view code 
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView 
{ 
    //first check if the user is searching 
    if (isSearchOn) { 
     return 1; 
    } 
    //if not, then search by alpha order 
    else { 
     return 24; 
    } 
} 

//create header titles & number of rows in section (it's a lot of code and works fine) 

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    static NSString *CellIdentifier = @"grapeCell"; 
    UITableViewCell *cell = [self.tableView dequeueReusableCellWithIdentifier:CellIdentifier]; 

    //is the user searching? 
    if (isSearchOn) { 
     NSString *cellValue = [searchResult objectAtIndex:indexPath.row]; 
     cell.textLabel.text = cellValue; 
    } 

    //otherwise... 
    else { 
     NSInteger theNumber; 
     NSInteger numberToAdd = [[howManyRowsInSection objectAtIndex:indexPath.section] integerValue]; 
     theNumberToAdd = numberToAdd; 
     theNumber = numberToAdd + indexPath.row; 

     //cell title = grape name 
     Grapes *grape = [self.grapes objectAtIndex:theNumber]; 
     NSString *theGrapeName = grape.grapeName; 
     cell.textLabel.text = theGrapeName; 
    } 
    return cell; 
} 

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { 
    //is the user searching? 
    if (isSearchOn) { 
     theNumberToAdd=0; //which is wrong but here for the time being 
     //i have to have the ID here in order to do some logic to figure out what row to return 
    } 

    //otherwise... 
    else { 
     theNumberToAdd = [[howManyRowsInSection objectAtIndex:indexPath.section] integerValue]; // i performed this logic elsewhere 
    } 


    ViewGrapeViewController *detailViewController = (ViewGrapeViewController *)self.presentedViewController; 
    detailViewController.detailItem = [self.grapes objectAtIndex: (indexPath.row+theNumberToAdd)]; 
} 

- (void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender 
{ 
    if ([[segue identifier] isEqualToString:@"toGrapeDetail"]) {  
     NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow]; 
     //is the user searching 
     if (isSearchOn) { 
      theNumberToAdd=0; // which is wrong 
     } 

     //otherwise... 
     else { 
      theNumberToAdd = [[howManyRowsInSection objectAtIndex:indexPath.section] integerValue]; 
     } 

     NSDate *object = [_objects objectAtIndex:(indexPath.row+theNumberToAdd)]; 
     [[segue destinationViewController] setDetailItem:object]; 
    } 
} 

Answer 1

在你做了选择项目的方法，从那个被选中，并通过您的数组进行迭代，直到找到匹配的项目单元格中的文本，然后打开电池的详细视图。如果您拥有所有独特的商品名称，这只会起作用。

- (void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    NSString *str = [[[tableView cellForRowAtIndexPath:indexPath] textLabel] text]; 
    for (int j=0; j<whateverArray.count; j++) 
    { 
     NSString *temp = [whateverArray objectAtIndex:j]; 
     if ([str isEqualToString:temp]) 
     { 
      //do whatever you would do if the user actually clicked the row at position j 
     } 
    } 
} 

Answer 2

您还可以为与阵列计数相关的每个单元格创建一个顺序标签号。然后，您抓住标签号码并将其用于索引处的对象。

这比搜索每个字符串的效率稍高一些，它可以容纳重复的字符串名称。

代码将是：

- (UITableViewCell *) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{ 

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:SectionCellIdentifier]; 
cell.tag = i //where i increments by one each entry into the function. 
}