0

だから私はこの機能を持っています：

- (UIImage*)imageByCombiningImage:(UIImage*)firstImage withImage:(UIImage*)secondImage {
    UIImage *image = nil;

    UIImageView *temp_img = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 400, 400)];
    temp_img.image = secondImage;
    secondImage = temp_img.image;



    CGSize newImageSize = CGSizeMake(MAX(firstImage.size.width, secondImage.size.width), MAX(firstImage.size.height, secondImage.size.height));
    if (UIGraphicsBeginImageContextWithOptions != NULL) {
        UIGraphicsBeginImageContextWithOptions(newImageSize, NO, [[UIScreen mainScreen] scale]);
    } else {
        UIGraphicsBeginImageContext(newImageSize); 
    }

    [firstImage drawAtPoint:CGPointMake(roundf((newImageSize.width-firstImage.size.width)/2), 
                                        roundf((newImageSize.height-firstImage.size.height)/2))]; 
    [secondImage drawAtPoint:CGPointMake(roundf((100)), 
                                         roundf((100)))]; 
    image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    return image;
}

secondImage UIImageのサイズを変更して、マージしたときにサイズを調整して見栄えを良くするようにしています。

助けてくれてありがとう！

4

1 に答える 1

1

UIGraphicsBeginImageContextWithOptions の「0」に注意してください。

UIGraphicsBeginImageContextWithOptions(newSize, NO, 0);
CGContextRef context = UIGraphicsGetCurrentContext();

CGAffineTransform flipVertical = CGAffineTransformMake(1, 0, 0, -1, 0, newSize.height);
CGContextConcatCTM(context, flipVertical);
...
// make anySize the size you want and pt any point

CGContextDrawImage(context, (CGRect){ pt1, anySize1 }, [first CGImage]);
// make anySize the size you want and pt any point
CGContextDrawImage(context, (CGRect){ pt2, anySize2 }, [secondImage CGImage]);

UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

return image;
于 2012-08-09T21:36:55.687 に答える