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becky hayes
2,226 PointsFun facts app - I'm a total newbie and struggling to understand why my code isnt compiling
It appears to be the same as the tutor's but i'm getting the following alerts: 'variable xx was never mutated - consider changing'
You can see a screen shot here! http://prntscr.com/a6pugu
2 Answers
Keli'i Martin
8,227 PointsThose are just warnings. They shouldn't be preventing your code from compiling. What the warnings are basically telling you are that you have defined those variables, but then they never get changed, so Xcode is suggesting that you instead define them as constants using the let keyword. Using constants as much as possible is highly suggested when developing in Swift, hence the warnings.
Are there any actual errors coming up when you try to build?
becky hayes
2,226 PointsActually its building fine now - thanks for your advice. No errors were showing in the tutor's example - confused me!
Keli'i Martin
8,227 PointsYeah, I think there must be some kind of setting to control how warnings appear in Xcode, because mine is the same way. Looks like it's an error (red underlines) but really just a warning.