iOS nav bar with username - ios

Question

How do we handle showing a http posted username to a navigation bar title? Here is a method which successfully shows a username in a jpeg represented photo taken by people in a UIScrollView*listview;
-(id)initWithIndex:(int)i andData:(NSDictionary*)data {
self = [super init];
if (self !=nil) {
//initialize
self.tag = [[data objectForKey:#"IdPhoto"] intValue];
int row = i/3;
int col = i % 3;
self.frame = CGRectMake(1.5*kPadding+col*(kThumbSide+kPadding), 1.5*kPadding+row*(kThumbSide+kPadding), kThumbSide, kThumbSide);
self.backgroundColor = [UIColor grayColor];
//add the photo caption
UILabel* caption = [[UILabel alloc] initWithFrame:CGRectMake(0, kThumbSide-16, kThumbSide, 16)];
caption.backgroundColor = [UIColor blackColor];
caption.textColor = [UIColor whiteColor];
caption.textAlignment = UITextAlignmentCenter;
caption.font = [UIFont systemFontOfSize:12];
caption.text = [NSString stringWithFormat:#"#%#",[data objectForKey:#"username"]];
[self addSubview: caption];
//add touch event
[self addTarget:delegate action:#selector(didSelectPhoto:) forControlEvents:UIControlEventTouchUpInside];
//load the image
API* api = [API sharedInstance];
int IdPhoto = [[data objectForKey:#"IdPhoto"] intValue];
NSURL* imageURL = [api urlForImageWithId:[NSNumber numberWithInt: IdPhoto] isThumb:YES];
AFImageRequestOperation* imageOperation = [AFImageRequestOperation imageRequestOperationWithRequest: [NSURLRequest requestWithURL:imageURL] success:^(UIImage *image) {
//create an image view, add it to the view
UIImageView* thumbView = [[UIImageView alloc] initWithImage: image];
thumbView.frame = CGRectMake(0,0,90,90);
thumbView.contentMode = UIViewContentModeScaleAspectFit;
[self insertSubview: thumbView belowSubview: caption];
}];
NSOperationQueue* queue = [[NSOperationQueue alloc] init];
[queue addOperation:imageOperation];
}
return self;
}

Answer 1

Place the self.navigationItem.title = label in the same method as the -(void)initWithIndex:(int)i andData:(NSDictionary*)data method, after the label receives information.
-(void)initWithIndex:(int)i andData:(NSDictionary*)data {
//remove the "#" from before the %# that you have below
label = [NSString stringWithFormat:#"#%#",[data objectForKey:#"username"]];
self.navigationItem.title = label;
}
Depending on whether it needs to load immediately, you should call the -(void)initWithIndex:(int)i andData:(NSDictionary*)data in viewDidLoad or viewWillAppear methods.
UPDATE
Try using this:
[self.navigationItem setTitle: label];
For some reason this works better. I tried both in a test and this one worked for me over the other.
UPDATE 2
Initialise your label with a value/object.
-(void)viewDidLoad{
label = #"";//initialises the value to be a blank string enabling use
//call your method that assigns the title now.
}
Now when the method -(void)initWithIndex:(int)i andData:(NSDictionary*)data is called, the title should update as label has been initialised and will now update it's value.
UPDATE 3 - AS PER ASKERS REQUEST
At the top of .m file
#interface YourClassName ()
{
NSString * label;
}
#end
#implementation YourClassName
-(void)viewDidLoad{
label = #"";//initialises the value to be a blank string enabling use
}
-(void)initWithIndex:(int)i andData:(NSDictionary*)data {
//remove the "#" from before the %# that you have below
label = [NSString stringWithFormat:#"#%#",[data objectForKey:#"username"]];
//the label now has a new value so use it for title
self.navigationItem.title = label;
//test to see that there is a value available in log
NSLog(#"What is the name: %#", label);
}