Extract define

Language: Objective-C

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The Extract Define refactoring method defines the selected set of tokens as macro using #define directive and replaces the set of tokens with macro call in the code; macro definition can be located in the current file or moved to the related header file.

Before	After
`@implementation Screen{ } - (CGPoint)getScreenCenter { // [UIScreen mainScreen].bounds.size will be extracted return CGPointMake(0.5 * [UIScreen mainScreen].bounds.size.width, 0.5 * [UIScreen mainScreen].bounds.size.height); } @end`	`// Extracted #define #define SCREEN_SIZE [UIScreen mainScreen].bounds.size @implementation Screen{ } - (CGPoint)getScreenCenter { return CGPointMake(0.5 * SCREEN_SIZE.width, 0.5 * SCREEN_SIZE.height); } @end`

Before

After

@implementation Screen{
}
- (CGPoint)getScreenCenter {
    // [UIScreen mainScreen].bounds.size will be extracted
    return CGPointMake(0.5 * [UIScreen mainScreen].bounds.size.width,
            0.5 * [UIScreen mainScreen].bounds.size.height);
}
@end

// Extracted #define
#define SCREEN_SIZE [UIScreen mainScreen].bounds.size

@implementation Screen{
}
- (CGPoint)getScreenCenter {
    return CGPointMake(0.5 * SCREEN_SIZE.width,
            0.5 * SCREEN_SIZE.height);
}
@end

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