ios三张图片组合一张

- (UIImage *)addImage:(UIImage *)image1 toImage:(UIImage *)image2 {

    UIGraphicsBeginImageContext(image1.size);

    // Draw image1

    [image1 drawInRect:CGRectMake(0, 0, 40, 40)];

    // Draw image2

    [image2 drawInRect:CGRectMake(40, 0, 40, 40)];

    // Draw image2

    [image2 drawInRect:CGRectMake(00, 40, 80, 40)];

    UIImage *resultingImage = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    return resultingImage;

}

ios三张图片组合一张

原文：http://www.cnblogs.com/lihaibo-Leao/p/5552213.html