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Pablo Kvitca
Pablo Kvitca
Courses Plus Student 9,624 Points

Code Challenge: Programming a Background Image (iOS 7)

I'm stuck at this code challenge:

"Our Random Quotes app is looking bland and we need to add a background image to it. We started to create a UIImageView, however, the code does not seem to work. Figure out what is wrong and if you need to declare another object to complete this declaration."

This is my current input:

// The following code is excerpted from 
// the viewDidLoad method of THViewController.m

// Fix the code below 
// Hint: First create an instance of UIImage

UIImage *backgroundImage = [UIImage imageNamed:@"background.png"];
UIImageView *imageView = [[UIImageView alloc] initWithImage:backgroundImage];
[self.view insertSubview:imageView atIndex:0];

The message says: "Bummer! Remember that UIImageView needs to be initialized with a UIImage object."

Also, I get the following error (when I click "Preview"): "use of undeclared identifier 'self' [self.view insertSubview:imageView atIndex:0]; ^ 1 error generated."

Can anyone tell me what's wrong and how to fix it?? Thank you!

5 Answers

The first thing it is asking you to do is fix is the code that's wrong.

This is what is the code they give you: UIImageView *imageView = [[UIImageView alloc] initWithImage:@"background"];

This is what it should be: UIImageView *imageView = [[UIImageView alloc] initWithImage:backgroundImage];

The second part is to add a line of code ABOVE: UIImage *backgroundImage = [UIImage imageNamed:@"background"];

This is what it will look like when you're done: UIImage *backgroundImage = [UIImage imageNamed:@"background"]; UIImageView *imageView = [[UIImageView alloc] initWithImage:backgroundImage];

Bogdan is right, you don't need the [self.view insertSubview:imageView atIndex:0]; for this challenge.

Bogdan Raduta
Bogdan Raduta
1,076 Points

Remove [self.view insertSubview:imageView atIndex:0]; because probably the compiler doesn't expect this line in that particular challenge.

Miguel Martin
Miguel Martin
21,703 Points

just do this:

UIImage *backgroundImage = [UIImage imageNamed:@"background"]; UIImageView *imageView = [[UIImageView alloc] initWithImage:backgroundImage];

Stone Preston
Stone Preston
42,016 Points

hmm try

[self insertSubview:imageView atIndex:0]

pretty sure its view controller method, not a view.

Wow, this was so infuriating. The instructor gave us the wrong information, I couldn't figure this out for like a week and was so discouraged. Looking at my notes, then finally pausing the video in another window, typing in the code exactly as it was presented. Only to be told I was wrong some more. I wouldn't expect that when paying 50$ a month, I would have to deal with something that is EASILY fixed with a little bit of attention to detail. 12.50$ a week and the frustration of being so discouraged that I am too dumb to learn how to do this. Bittersweet, finding out that all of this is because the instructor doesn't give a shit.

Renewing my membership next month? Doubtful.