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Home/ Questions/Q 7731891
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Editorial Team
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Editorial Team
Asked: June 1, 20262026-06-01T06:35:36+00:00 2026-06-01T06:35:36+00:00

This is my first question. I have an app in which i want to

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This is my first question.
I have an app in which i want to change the image effect look like negative color effect

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  1. Editorial Team
    Editorial Team
    2026-06-01T06:35:38+00:00Added an answer on June 1, 2026 at 6:35 am

    it’s so simple you have to choose image and set the image in the below code

    UIGraphicsBeginImageContext(renderImage.size);
     CGContextSetBlendMode(UIGraphicsGetCurrentContext(), kCGBlendModeCopy);
     [renderImage drawInRect:CGRectMake(0, 0, renderImage.size.width, renderImage.size.height)];
     CGContextSetBlendMode(UIGraphicsGetCurrentContext(), kCGBlendModeDifference);
     CGContextSetFillColorWithColor(UIGraphicsGetCurrentContext(),[UIColor whiteColor].CGColor);
     CGContextFillRect(UIGraphicsGetCurrentContext(), CGRectMake(0, 0, renderImage.size.width, renderImage.size.height));
     renderImage = UIGraphicsGetImageFromCurrentImageContext();
     UIGraphicsEndImageContext();
    
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