如何獲得indexPath值到NSMutableArray？

Question

我必須得到IndexPath值到NSMutableArray。當一個特定的單元格被選中時，我必須做一個操作它的IndexPath存儲在NSMutableArray中，並且特定的單元格高度正在增加。當我再次按下那個單元格時，特定的單元格高度正在下降。我怎麼可能以及我必須提出什麼樣的條件？

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    NSLog(@"%@",indexPath); 
    selectIndexPathCell = indexPath; 
    NSIndexPath *previousSelectedIndexPath = selectIndexPathCell; 
    selectIndexPathCell = indexPath; 

    if (previousSelectedIndexPath) {    
    [tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:previousSelectedIndexPath] 
             withRowAnimation:UITableViewRowAnimationAutomatic]; 
    } 
    [tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:selectIndexPathCell] 
       withRowAnimation:UITableViewRowAnimationAutomatic]; 

    self.selectedRow = sections_main[indexPath.section][@"content"][indexPath.row]; 
    [tblPeople beginUpdates]; 

    [tblPeople endUpdates]; 
} 

- (CGFloat)tableView:(UITableView *)aTableView heightForRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    if(selectIndexPathCell != nil && [selectIndexPathCell compare:indexPath] == NSOrderedSame){ 
     return 80; 
      }else{ 
       return 60.0; 
} 

}

Answer 1

Take a global variable ex: Int selectedIndex; and now in didselectrow write this 
-(void)viewDidLoad 
{ 
[super viewDidLoad]; 
selectedIndex=50; // please assign it as your arraycount+1; which you are using to display on tableview 
} 
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath 
{ 

if(selectedIndex==indexPath.row) 
{ 
    // if this is true you can do decrease your cell height 
selectedIndex=50; // please assign it as your arraycount+1; 
} 
else 
{ 
    // user can select one row and he can select another row without minimizing the previous one so you need to minimize the previous and increase new one. by using selectedIndex decrease cell height and by using indexPath.row increase height of cell 
selectedIndex=indexPath.row; 

} 
[tableview reload]; 
} 
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
if(selectedIndex==indexPath.row) 
{ 
    return 60; 
} 
else 
{ 
return 30; 
} 

} 

Answer 2

我的理解，你要根據表格視圖單元格高度限制條件。您可以通過將相應單元的rowIndex保存在array中，並通過使用reloadData來管理它，並且可以在heightForRowAtIndexPath委託下管理功能高度，單元格高度將根據數組值進行更改。看看我的建議here。

希望它能幫助！

編輯：（未經測試版本給你一個想法）

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    if(![arrayOfExpandedCellIndexes containsObject:[NSNumber numberWithInteger:indexPath.row]]) 
    { 
     [arrayOfExpandedCellIndexes addObject:[NSNumber numberWithInteger:indexPath.row]]; // add if it does not exist 
    } 
    else 
    { 
     [arrayOfExpandedCellIndexes removeObject:[NSNumber numberWithInteger:indexPath.row]]; // remove if it exists 
    } 

    [tableView reloadData]; // reload data so height would adjust in `heightForRowAtIndexPath` 
} 

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    if([arrayOfExpandedCellIndexes containsObject:[NSNumber numberWithInteger:indexPath.row]])  
     return EXTENDED_CELL_HEIGHT; // Macro : #define EXTENDED_CELL_HEIGHT 230.0f 
    else 
     return NORMAL_CELL_HEIGHT;  // Macro : #define NORMAL_CELL_HEIGHT 100.0f 
} 

假設arrayOfExpandedCellIndexes是NSMutableArray保持indicies。