How to define constant in swift?

Question

I searched a lot over the internet to find the right solution to convert my constant .h file to swift. I already tried these links

These both are use full but not completely solved my problem.

I just want to convert these three #define to swift all other can be converted in the same way as these will do.

#define IS_IPHONE_4S [[UIScreen mainScreen] bounds].size.height == 480
#define IOS7VERSION ([[[UIDevice currentDevice] systemVersion] floatValue]>=7.0?YES:NO)
#define RGBCOLOR(r, g, b) [UIColor colorWithRed:(r)/255.0f green:(g)/255.0f blue:(b)/255.0f alpha:1]

These are not constants, these are macros. Just replace them with functions. — The Paramagnetic Croissant, Nov 17 '15 at 07:04
constant is defined using 'let' keyword in swift but according to above code , if you want how to define macros in swift then http://stackoverflow.com/a/24116621/3400991 will help . Thanks — Shobhakar Tiwari, Nov 17 '15 at 07:09
The first one of these is totally broken. Turn your phone sideways, and suddenly it's not an iPhone 4 anymore. — gnasher729, Nov 17 '15 at 07:21

score 3 · Accepted Answer · answered Nov 17 '15 at 07:11

3

You can use the keyword let for this. For example:

let IsIPhone4S = UIScreen.mainScreen().bounds.height == 480
let IOS7Version = Float(UIDevice.currentDevice().systemVersion) >= 7

And for the last case you should use function:

func RGBColor(red: CGFloat, green: CGFloat, blue: CGFloat) -> UIColor {
    return UIColor(red: red / 255, green: green / 255, blue: blue / 255, alpha: 1)
}

answered Nov 17 '15 at 07:11

Sviatoslav Yakymiv

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@VarunNaharia, so why don't you approve the answer? – Sviatoslav Yakymiv Nov 17 '15 at 14:01

How to define constant in swift?

1 Answers1