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iOS

Posted by Stu Cowley
Stu Cowley
26,287 Points

Create a Simple iPhone App Code Challenge: Programming a Background Image

Hey guys,

So I have been stuck on the code challenge for Programming a Background Image for the Crystal Ball iPhone App.

I have been trying to get this right for a couple days but I keep getting an error.

Here's what is required: 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.

Here is what I I currently have:

// 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"];

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

What do you think Amit Bijlani ?

Any help will be greatly appreciated.

Stu :)

Dastan Aryngazy
Dastan Aryngazy
Courses Plus Student 1,660 Points

you should delete after initWithImage, @""; thats all.

1 Answer

Stone Preston
Stone Preston
42,016 Points
Stone Preston
Stone Preston
42,016 Points 
[[UIImageView alloc] initWithImage:@"background"];

the method initWithImage takes an image as an argument, not a string. See if you can figure it out now. You just created an image in the line above it so it should be easy to fix now

Rashii Henry
Rashii Henry
16,433 Points

How will you always know what parameters a method can take?

Stone Preston
Stone Preston
42,016 Points

Most of the time the method name will hint at it such as initWithImage. Xcode also shows you when you autocomplete a method. It will have the argument types in grey. You can also check the apple docs