Select all cells on UITableView

Question

I'm trying to have an edit button select all the cells on a table. I've been trying to figure out what I am doing wrong. Here is my code. I am basically looping through the sections and then through the number of rows. Whatever I do, it does not setSelect each cell. How would I achieve this?

@property (strong, nonatomic) IBOutlet UITableView *caseDataTableView;

@synthesize segmentControl,caseDataTableView,IndicationView,procedureView,indicationScrollView,procedureScrollView,segmentControllView,segmentControllios6;


- (IBAction)editButtonTapped:(id)sender {

    for (int i = 0; i < self.caseDataTableView.numberOfSections; i++) {
        for (NSInteger r = 0; r < [self.caseDataTableView numberOfRowsInSection:i]; r++) {
             UITableViewCell *cell = [self.caseDataTableView cellForRowAtIndexPath: [NSIndexPath indexPathForRow:r inSection:i]];
             [cell setSelected:YES];
        }
    }
}

Answer 1

You can use a for loop

- (IBAction)editButtonTapped:(id)sender 
{
   for (int i = 0; i < self.tableView.numberOfSections; i++) 
   {
       for (int j = 0; j < [self.tableView numberOfRowsInSection:i]; j++)    
       {
        [self.tableView selectRowAtIndexPath:[NSIndexPath indexPathForRow:j inSection:i]
                                    animated:NO
                              scrollPosition:UITableViewScrollPositionNone];
       }
   }
}

Answer 2

您可以选择一个单元格调用表视图的selectRowAtIndexPath方法：

[caseDataTableView selectRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:0] animated:NO scrollPosition:UITableViewScrollPositionTop];

Answer 3

The problem that I had was two things. The first being the editButtonTapped method being incorrect.

- (IBAction)editButtonTapped:(id)sender {

for (int i = 0; i < self.caseDataTableView.numberOfSections; i++) {
    for (NSInteger r = 0; r < [self.caseDataTableView numberOfRowsInSection:i]; r++) {
        [self tableView:caseDataTableView didSelectRowAtIndexPath:[NSIndexPath indexPathForRow:r inSection:i]];
    }
}}

The next issue was the didSelectRowAtIndexPath method scrolling down when I would do my loop. It would eventually go down to the last cell in the previous loop. I took this piece of code out on the didSelectRowAtIndexPath method.

[tableView scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionTop animated:YES]

Setting the scrollPosition in my situation would clear the selections out and thats why it was removed.