iphone - 进行3D变换后如何将图像保存在相册中？

Question

如何将3D转换后的图像保存在相册中？我正在使用CATransform3DRotate更改转换。我无法保存图像。图片保存代码。

UIImageWriteToSavedPhotosAlbum(newImage, nil, nil, nil);

是否可以保存 3D 转换后的图像？请帮助我。在此先感谢。

Answer 1

UIImageWriteToSavedPhotosAlbum(UIImage *image, id completionTarget, SEL completionSelector, void *contextInfo);

如果要在图像保存完成时收到通知，则只需要 completionTarget、completionSelector 和 contextInfo，否则可以传入 nil。

好的，然后尝试这样..

UIGraphicsBeginImageContext(YOUR_VIEW.frame.size);
[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil);

它将像屏幕截图一样捕获您的视图并保存到相册

• YOUR_VIEW = paas您编辑的图像的超级视图..

Answer 2

-(UIImage *) glToUIImage {
    NSInteger myDataLength = 320 * 480 * 4;

    // allocate array and read pixels into it.
    GLubyte *buffer = (GLubyte *) malloc(myDataLength);
    glReadPixels(0, 0, 320, 480, GL_RGBA, GL_UNSIGNED_BYTE, buffer);

    // gl renders "upside down" so swap top to bottom into new array.
    // there's gotta be a better way, but this works.
    GLubyte *buffer2 = (GLubyte *) malloc(myDataLength);
    for(int y = 0; y < 480; y++)
    {
        for(int x = 0; x < 320 * 4; x++)
        {
            buffer2[(479 - y) * 320 * 4 + x] = buffer[y * 4 * 320 + x];
        }
    }

    // make data provider with data.
    CGDataProviderRef provider = CGDataProviderCreateWithData(NULL, buffer2, myDataLength, NULL);

    // prep the ingredients
    int bitsPerComponent = 8;
    int bitsPerPixel = 32;
    int bytesPerRow = 4 * 320;
    CGColorSpaceRef colorSpaceRef = CGColorSpaceCreateDeviceRGB();
    CGBitmapInfo bitmapInfo = kCGBitmapByteOrderDefault;
    CGColorRenderingIntent renderingIntent = kCGRenderingIntentDefault;

    // make the cgimage
    CGImageRef imageRef = CGImageCreate(320, 480, bitsPerComponent, bitsPerPixel, bytesPerRow, colorSpaceRef, bitmapInfo, provider, NULL, NO, renderingIntent);

    // then make the uiimage from that
    UIImage *myImage = [UIImage imageWithCGImage:imageRef];
    return myImage;
}

-(void)captureToPhotoAlbum {
    UIImage *image = [self glToUIImage];
    UIImageWriteToSavedPhotosAlbum(image, self, nil, nil);
}

还可以从此链接查看在 photoAlbum 中保存 openGL 图像的完整教程

并且还看到我的博客这篇文章.. captureimagescreenshot-of-view

2. 也用于ALAssetsLibrary保存图像

ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];

    [library writeImageToSavedPhotosAlbum:[image CGImage] orientation:(ALAssetOrientation)[image imageOrientation] completionBlock:^(NSURL *assetURL, NSError *error){
    if (error) {
    // TODO: error handling
    } else {
    // TODO: success handling
    }
}];
[library release];