Question

I am passing an NSDictionary object from one view class to another as I transition from a table view to a normal view to show details:

Passing Controller:

[tweetController setTweet:tweet];

Receiving Controller.h:

@interface TweetViewController : UIViewController {
    NSDictionary *tweet;
}

@property (nonatomic, retain) NSDictionary *tweet;

Receiving Controller.m:

@implementation TweetViewController

@synthesize tweet = _tweet;

I then try to use this information to set the properties of some fields in my view:

- (void)viewDidLoad
{
    [super viewDidLoad];
    tweetLabel.text = [_tweet objectForKey:@"text"];
}

The result is a blank label and if I inspect the value of _tweet at this stage it is nil.

I originally had a method which set the value of tweet which I called at the same location as I am now setting the value. If I inspected the value at this stage it was fine.

I presume that the automagic setter through @synthasize is working, but somewhere else the value is being lost.

Sorry this is my first objective C anything! Thanks for any help in advance.

Answer 1

You are using your “tweet” instance variable, whereas the “tweet” property is synthesized to the “_tweet” variable.