Add/Remove cell from UITableViewController

這是一個可以新增刪除cell data的table

實作方法如下:

1. 在viewDidLoad地方加入editButtonItem:

1 2	// add native edit button on navigation bar self.navigationItem.rightBarButtonItem = self.editButtonItem;

2. 在 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section 應該加上:

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// If we're in editing mode, we add a placeholder row for creating new items. if (self.editing) { count++; }

3. 在顯示table cell的部份,

- (UITableViewCell *)tableView:(UITableView *)tv cellForRowAtIndexPath:(NSIndexPath *)indexPath 也要在每次table有變動時做更新:

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if (indexPath.row == [myArray count]) { // assign the content of last cell in editing mode [cell.textLabel setText:@"Add new data"]; cell.editingAccessoryType = UITableViewCellAccessoryDisclosureIndicator; } else { // assign other cell data }

4. 當點選add new data的cell,

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if (indexPath.row == [myArray count]) { [myTable deselectRowAtIndexPath:indexPath animated:YES]; if (self.editing) { // Called after selection. In editing mode, this will navigate to a new view controller. }

5. 回頭來看看當tableview的edit mode切換時要實作的部分,先加上

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- (void)setEditing:(BOOL)editing animated:(BOOL)animated { [super setEditing:editing animated:animated]; [myTable setEditing:editing animated:animated]; [self.navigationItem setHidesBackButton:editing animated:YES]; [myTable beginUpdates]; NSUInteger wc = [myArray count]; NSArray *myInsertIndexPath = [NSArray arrayWithObject:[NSIndexPath indexPathForRow:wc inSection:0]]; if (editing) { [myTable insertRowsAtIndexPaths:myInsertIndexPath withRowAnimation:UITableViewRowAnimationTop]; } else { [myTable deleteRowsAtIndexPaths:myInsertIndexPath withRowAnimation:UITableViewRowAnimationTop]; } [myTable endUpdates]; }

6. 接下來是設定edit模式下cell 左邊的加減符號

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- (UITableViewCellEditingStyle)tableView:(UITableView *)aTableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath { // The editing style for a row is the kind of button displayed to the left of the cell when in editing mode. if (indexPath.row == [myArray count]) { return UITableViewCellEditingStyleInsert; } else { return UITableViewCellEditingStyleDelete; } }

7. 有新增刪除就一定要update table的內容

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- (void)tableView:(UITableView *)aTableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath { if (editingStyle == UITableViewCellEditingStyleDelete) { // Remove the corresponding object and delete the appropriate table view cell. [myArray removeObjectAtIndex:indexPath.row]; [myTable deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationTop]; }

8. 這裡的例子是在別的頁面新增輸入要新增的cell內容,

所以需要一個完成後的實作function :

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- (void)addCellDone { // update array NSString *v =[NSString stringWithFormat:@"123"]; [self.weightArray addObject:v]; // reload table [myTable reloadData]; //remove modal view [self dismissModalViewControllerAnimated:YES]; }

OK～你得到它了!