转载自:http://blog.sina.com.cn/s/blog_61235faa0100z3dp.html

CIImage *saveToSave = [filter outputImage];

CGImageRef cgImg = [context createCGImage:saveToSave fromRect:[saveToSave extent]];

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

[library writeImageToSavedPhotosAlbum:cgImg
metadata:[saveToSave properties]
completionBlock:^(NSURL *assetURL, NSError *error) {
CGImageRelease(cgImg);
}];
04-19 20:11