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iOS Build a Playlist Browser with Objective-C Working With Multiple View Controllers Recap of iOS Basics

Genevieve Tan
Genevieve Tan
4,257 Points

Unable to use UIColororangeColor

Hi,

I keep getting an compiling error called Use of undeclared identifier 'UIColororangeColor"

I followed what paean typed in the video. Why is it not working for me ? :(

Please advise me on what i should do.

How do i access default colours such as red orange , blue, yellow etc.

Thanks

This is my code :

self.view.backgroundColor = [UIColororangeColor] ;

2 Answers

Genevieve, I reviewed your code and it seems to me that your code does successfully change the background color to the default orange color.

self.view.backgroundColor = [UIColor orangeColor]; 

You can access all default colors with UIColor (redColor, grayColor). You can make custom colors with rgb values using UIColor's method shown here:

 self.view.backgroundColor = [UIColor colorWithRed:100 / 255.0 green:100 / 255.0 blue:100 / 255.0 alpha:1];

The above code will create a gray color. Since 255.0 is the greatest number for red, green and blue, you need to divide it by 255.0 to get a percent out of 1.

If you have any questions, feel free to ask!

Roberto Alicata
PLUS
Roberto Alicata
Courses Plus Student 39,959 Points

You wrote [UIColororangeColor] instead of [UIColor orangeColor]