Difficulty trying to implement separate UITableViewDelegate - ios

Question

I have a UITableView in my app and I'm trying to pull it's delegate methods into a separate UITableViewDelegate. This is what the code looks like:
RestaurantViewDelegate *delegate = [[RestaurantViewDelegate alloc] initWithRestaurant:self.restaurant andRecommended:self.recommended];
self.tableView = [[UITableView alloc] initWithFrame:CGRectMake(0, 235.0f, self.view.frame.size.width, self.view.frame.size.height-235)];
self.tableView.delegate = delegate;
self.tableView.dataSource = delegate;
[self.view addSubview:self.tableView];
And this is what RestaurantViewDelegate looks like:
// RestaurantViewDelegate.h
#interface RestaurantViewDelegate : NSObject <UITableViewDelegate>
#property (nonatomic, strong) NSArray *recommendations;
#property (nonatomic, strong) Restaurant *restaurant;
- (id)initWith Restaurant:(Restaurant *)restaurant andRecommended:(NSArray *)recommendations;
#end
and
// RestaurantViewDelegate.m
#implementation RestaurantViewDelegate
#synthesize recommendations = _recommendations;
#synthesize restaurant = _restaurant;
- (id)initWith Restaurant:(Restaurant *)restaurant andRecommended:(NSArray *)recommendations {
self = [super init];
if ( self != nil ) {
_recommendations = recommendations;
_restaurant = restaurant;
}
return self;
}
#pragma mark - UITableViewDataSource
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
NSLog(#"Recommendations: %d", [_recommendations count]);
return [_recommendations count];
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
return 48.0f;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *MyIdentifier = #"MyIdentifier";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:MyIdentifier];
if (cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:MyIdentifier];
}
return cell;
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
#end
However, when I run my app and click on a cell, all cells disappear. I really don't know what's causing this. Any ideas as to what I'm doing wrong?

Answer 1

This is a very interesting problem. Remember that in ARC (Automatic reference counting ), an object will be retained only as long as a strong reference to it is maintained. Remember, the 'delegate's are always weak, and in your case it means, once you come out of the scope, where you create the delegate object and setup the table view, there will no longer any delegate object retained. This is the reason you might not see anything happening when you try to reload the table view. Make the delegate object RestaurantViewDelegate a member of your controller. And check..