UIImage Conversion Sample ------------------------- Paul Solt 2010 Here's a sample project and code to convert between UIImage objects and RGBA8 bitmaps. The sample project is iPhone 4/iPad 3.2 compatible. The ImageHelper works with iPhone 4 and the Retina display using the correct scale factor with high resolution images. Basic Example Usage showing the ability to convert back and forth between formats: --------------------------------------------------------------------------------- // Look at the sample project for actual usage NSString *path = (NSString*)[[NSBundle mainBundle] pathForResource:@"Icon4" ofType:@"png"]; UIImage *image = [UIImage imageWithContentsOfFile:path]; int width = image.size.width; int height = image.size.height; // Create a bitmap unsigned char *bitmap = [ImageHelper convertUIImageToBitmapRGBA8:image]; // Create a UIImage using the bitmap UIImage *imageCopy = [ImageHelper convertBitmapRGBA8ToUIImage:bitmap withWidth:width withHeight:height]; // Display the image copy on the GUI UIImageView *imageView = [[UIImageView alloc] initWithImage:imageCopy]; // Cleanup free(bitmap);