IBOutlet works in iOS 6 but null in iOS 4.3? - ios

Question

I have a custom view for my tableview's header
UIView *headerTableview_;
#property (nonatomic, retain) IBOutlet UIView *headerTableview;
I have connected it to xib file.
Then in .m file,
#synthesize headerTableview = headerTableview_;
- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section{
return headerTableview_.frame.size.height;
}
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section{
return headerTableview_;
}
Then, I try to run it, in iOS 6 it's displayed well, but in iOS 4.3, it's not displayed at all.
What could be the problem? Anyone knows how to fix this weird problem?
Thanks!

Answer 1

In your .h file
#interface testViewController : UIViewController <UITableViewDataSource, UITableViewDelegate>
{
UITableView *tableView;
}
#property (retain, nonatomic) IBOutlet UIView *testView;
#end
In your .m file
#implementation testViewController
#synthesize testView;
- (void)viewDidLoad
{
[super viewDidLoad];
tableView = [[UITableView alloc]initWithFrame:self.view.frame style:UITableViewStylePlain];
tableView.delegate = self;
tableView.dataSource =self;
[self.view addSubview:tableView];
[self.view bringSubviewToFront:tableView];
// Do any additional setup after loading the view, typically from a nib.
}
- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section{
return testView.frame.size.height;
}
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section{
return testView;
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
return 2;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return 3;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
static NSString *CellIdentifier = #"Products";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];}
//UIImage *currentTweet = [[xmlParser tweets] objectAtIndex:1];
cell.textLabel.text= #"text label";
cell.detailTextLabel.text=#"detailTextLabel";
return cell;}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)dealloc {
[testView release];
[super dealloc];
}
#end

Answer 2

Create a new class file named HeaderTableview. See if this initializes properly when assigning in IB.
//.h
#class HeaderTableview;
#interface ViewController : UIViewController
#property (nonatomic, retain) IBOutlet HeaderTableview *headerTableview;
//.m
#synthesize headerTableview = _headerTableview;
- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section{
return _headerTableview.frame.size.height;
}