CODEWITHSUNDEEP
iosobjective-cuitableviewuiviewcontroller
Sam Spencer
Sam Spencer

Reputation: 8608

UITableView within a UIViewController

How can I use a inside of a ? Below is an example of what I'm trying to do (except this is just the UITableview in my Storyboard):

UITableView inside a UIViewController

I've figured out that I need to add the delegate and data source to my header:

//MyViewController.h
@interface MyViewController : UIViewController <UITableViewDelegate, UITableViewDataSource>

In my Implementation file, I've added the required methods:

//MyViewController.m

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    // Return the number of sections.
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    NSLog(@"cellForRowAtIndexPath");

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"FileCell"];

    NSLog(@"cellForRowAtIndexPath");
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSArray *fileListAct = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:documentsDirectory error:nil];

    cell.textLabel.text = [NSString stringWithFormat:@"%@",[fileListAct objectAtIndex:indexPath.row]];

    return cell;
}

The delegate, datasource, and UITableView are all hooked up in my Storyboard:

UITableView Delegate and DataSource in Interface Builder Connections Outlet

I can't get the TableView to load the content that I tell it to. It always comes up blank. Why won't the TableView fill with the content I tell it to in the cellForRowAtIndexPath method? What am I missing here?

Upvotes: 9

Views: 10729

Answers (4)

Pedro Trujillo
Pedro Trujillo

Reputation: 1691

The problem is in the UITableViewDelegate method numberOfRowsInSection. This one does not return an NSInteger number of rows. This example can help:

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return theNumberOfRowsForYourTable; // <-- not just return;
}

Upvotes: 0

Yan
Yan

Reputation: 21

You need an IBOutlet for YourTableView, then connect TableView to YourTableView

Upvotes: 0

Webdevotion
Webdevotion

Reputation: 1243

You are not returning any valid value. See the return; without any numeric value to return?

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
  return; // it should be return 15; or return self.datasource.count;
  NSLog(@"numberOfRowsInSection");
}

Upvotes: 1

jsd
jsd

Reputation: 7703

You do have to link the dataSource and delegate outlets from the tableview in storyboard to the view controller. This is not optional. This is why your table is blank, it is never calling your view controller's table view methods. (You can prove this by setting breakpoints on them and seeing that they never get triggered.) What sort of build errors are you getting?

Upvotes: 11

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