Table view inside a normal view controller - ios

Question

I'm doing this iPhone project where I need to have a (dynamic) table view inside a normal view controller. I didn't choose a Table View Controller because I need to put other stuff in the page. Imagine a page with text fields, buttons and my small table view of about 4-5 cells.
When I run the app, I need to touch a button to segue to this view. The I click the button, the app crashes and tells me that:
2012-07-22 14:40:57.304 How Many?[3055:f803] * Assertion failure in
-[UITableView _createPreparedCellForGlobalRow:withIndexPath:], /SourceCache/UIKit_Sim/UIKit-1914.84/UITableView.m:6061
This is my .H file:
#import <UIKit/UIKit.h>
#interface ProjectViewController : UIViewController <UITableViewDelegate, UITableViewDataSource>
#end
This is my .M file:
#import "ProjectViewController.h"
#interface ProjectViewController ()
#end
#implementation ProjectViewController
//MyViewController.m
#pragma mark - Table View Data Source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
NSLog(#"numberOfSectionsInTableView");
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
NSLog(#"numberOfRowsInSection");
return 5;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
NSLog(#"cellForRowAtIndexPath");
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"cell"];
NSLog(#"cellForRowAtIndexPath");
cell.textLabel.text = #"Test";
return cell;
}
#end
I control-dragged from the table view to my controller to set the delegate and the datasource.
What did I do wrong??
Thanks for your help.

Answer 1

Try to make an outlet in your .h file and wire it to the tableView in your storyboard
ProjectViewController.h
#property (nonatomic, strong) IBOutlet UITableView *myTableView;
ProjectViewController.m
#synthesize myTableView;
...
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
NSLog(#"cellForRowAtIndexPath");
UITableViewCell *cell = [self.myTableView dequeueReusableCellWithIdentifier:#"cell"];
NSLog(#"cellForRowAtIndexPath");
cell.textLabel.text = #"Test";
return cell;
}

Answer 2

In your -cellForRowAtIndexPath, if you do this, you will be fine.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
NSLog(#"cellForRowAtIndexPath");
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"cell"];
if(cell == nil)
{
cell = [[UITableViewCell alloc]
initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:#"cell"];
}
NSLog(#"cellForRowAtIndexPath");
cell.textLabel.text = #"Test";
return cell;
}
The problem is your cell never got memory allocated and initialized. That's why you get the error.