Sending data from a UIlabel from one view controller to another - ios

Question

I have two view controllers
DetailViewController
BlogViewController
I have a 'push' set-up on the storyboard with the identifier 'ShowBlog'
i need to send the title of the blog from the UILabel below on the DetailViewController:
#property (strong, nonatomic) IBOutlet UILabel *TitleLabel;
to a UILabel on the BlogViewController called BlogTitleLabel:
#property (strong, nonatomic) IBOutlet UILabel *BlogTitleLabel;
i know i need to use:
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([[segue identifier] isEqualToString:#"ShowBlog"]) {
// Im struggling with the code
}
}
But im struggling with the code to go in it

Answer 1

Use NSUserDefaults the code goes something like this:
Store the title:
[[NSUserDefaults standardUserDefaults] setObject:label.title forKey:#"nameForStoredVariableHere"];
[[NSUserDefaults standardUserDefaults] synchronize];
Retrieve the stored title:
NSString *storedTitle = [[NSUserDefaults standardUserDefaults] objectForKey:#"nameForStoredVariableHere"];
After that you're free to use the title as you please

Answer 2

prepareForSegue is called before destination VC's viewDidLoad so don't try to access any view object of destination view controller in prepareForSegue. Its better you create a string property in destination and set that in prepareForSegue method. In destination viewController's viewDidLoad set it to label.

Answer 3

You should not try to send data from label to label. Labels are view objects. They display information and collect input from the user. They do not store information.
Also, you should never, ever try to manipulate another view controller's views directly. That violates the other view controller's encapsulation.
Both view controllers should have NSString properties for this. Let's call it blogTitle on both VCs.
Your DetailViewController should set it's blogTitle somewhere during it's setup, and then in viewWillAppear:animated, display that value to it's titleLabel outlet:
- (void) viewWillAppear: animated;
{
[super viewWillAppear: animated];
self.titleLabel.text = self.blogTitle;
//your other code here
}
Then, in your prepareForSegue:
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([[segue identifier] isEqualToString:#"ShowBlog"])
{
BlogViewController *theBlogController = [segue destinationViewController];
theBlogController.blogTitle = self.blogTitle; //Pass the blog title to the other VC
}
}
And then in the BlogViewController's viewWillAppear, copy the blogTitle to it's title label:
- (void) viewWillAppear: animated;
{
[super viewWillAppear: animated];
self.titleLabel.text = self.blogTitle;
//your other code here
}
Note that Cocoa/iOS programming has strong naming conventions that you should follow. Only filenames and class names should start with a capital letter. Method names, instance variable names, and property names should start with a lower-case letter. So your TitleLabel should be titleLabel, and BlogTitleLabel should be blogTitleLabel.