目标c-表格视图无法在屏幕上显示数据

Question

I have an array of data. And wr my data are not displaying in the screen. Not sure, what i am missing.

@property NSMutableArray *NotifTotal;

@interface HomeVC ()<UITableViewDelegate, UITableViewDataSource>
@end

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return [self.NotifTotal count];
}

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


    NSDictionary *dict;
    dict = [self.NotifTotal objectAtIndex:indexPath.row];
    NSLog(@"%@", dict);  // data is coming.
    NSString* salt = [dict objectForKey:@"salt"];
    NSString* name = [dict objectForKey:@"Name"];
    NSLog(@"%@%@", name,swerk); // in console i can print the data
    cell.sLabel.text = [NSString stringWithFormat: @"%@", salt];
    cell.nLabel.text = [NSString stringWithFormat: @"%@", name];
    return cell;
}

Why my data is not showing in my screen.I added the delegate, data source also in my screen.Any solution ?

Answer 1

You said "I added the delegate, data source also in my screen" but it is not very clear to me by that you meant conforming your HomeVC to UITableViewDelegate and UITableViewDataSource as your posted code or you actually set the delegate of your UITableView to HomeVC . So here are something you should check:

• Set datasource of your UITableView to HomeVC using Interface Builder or following code:

   self.tableView.dataSource = self; // I am assuming self == HomeVC instance 

• Make sure [self.NotifTotal count] > 0 .

• Make sure it is not about UITableView's configuration issue by adding a break point to cellForRowAtIndexPath and confirm it called.

  • If it isn't: go back to 2 points above.
  • If it is: this is UI issue, let's check if your cells's height is near 0 or they have a transparent color and so on. You can use Xcode's View Debugging tool to debug the issue.

Answer 2

Since you haven't mentioned having registered the cell identifier yet, I assume that's the problem. One way to do this is in your storyboard or xib. Select the prototype cell in your tableview, and set the "identifier" field (in the Attributes inspector pane of Interface Builder). Set it to "FilterTableViewCell".

Answer 3

This looks like a xib problem. I added a bit of code in the middle.

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

//Add this part
if (cell == nil)
{
    NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"FilterTableViewCell" owner:self options:nil];
    cell = [nib objectAtIndex:0];
}
//end


NSDictionary *dict;
dict = [self.NotifTotal objectAtIndex:indexPath.row];
NSLog(@"%@", dict);  // data is coming.
NSString* salt = [dict objectForKey:@"salt"];
NSString* name = [dict objectForKey:@"Name"];
NSLog(@"%@%@", name,swerk); // in console i can print the data
cell.sLabel.text = [NSString stringWithFormat: @"%@", salt];
cell.nLabel.text = [NSString stringWithFormat: @"%@", name];
return cell;
}