用数据保存图片

Question

我知道如何保存图片，这是迄今为止的代码。此代码显示用户点击一个按钮并能够拍照。

-(IBAction)TakePhoto {
picker = [[UIImagePickerController alloc]init];
picker.delegate = self;
[picker setSourceType:UIImagePickerControllerSourceTypeCamera];
[self presentViewController:picker animated:YES completion:nil];
}

- (IBAction)ChooseExisting {
picker2 = [[UIImagePickerController alloc]init];
picker2.delegate = self;
[picker2 setSourceType:UIImagePickerControllerSourceTypePhotoLibrary];
[self presentViewController:picker2 animated:YES completion:nil];

}


- (void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
image = [info objectForKey:UIImagePickerControllerOriginalImage];
[imageview setImage:image];

//Save Your Image ======
UIImage *yourImage  = imageview.image;//imageView.image;
NSString *docDirPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
NSString *filePath = [docDirPath stringByAppendingPathComponent:@"myImageFile.png"];
[UIImagePNGRepresentation(yourImage) writeToFile:filePath atomically:YES];
[self dismissViewControllerAnimated:YES completion:nil];

}


- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
[self dismissViewControllerAnimated:YES completion:NULL];

}

但是，我想将我保存的图片分类为 6 个类别或流派，用户必须使用分段视图控件点击这些类别或流派。这可能吗？我对 ios 编程和 xcode 中的 Objective-c 非常陌生，并且对许多视图控制器感到困惑，但是我真的很喜欢这个工作，我找不到关于这个主题的任何资源。谢谢。

Answer 1

这是使用 ALAssetsLibrary 将图像保存到特定相册的一个很好的演示：

http://www.touch-code-magazine.com/ios5-saving-photos-in-custom-photo-album-category-for-download/

希望对你有所帮助...

或

您可以使用这段代码创建不同的库：

-(void)createDirectory:(NSString *)directoryName atFilePath:(NSString *)filePath
{
    NSString *filePathAndDirectory = [filePath stringByAppendingPathComponent:directoryName];
    NSError *error;

    if (![[NSFileManager defaultManager] createDirectoryAtPath:filePathAndDirectory
                                   withIntermediateDirectories:NO
                                                    attributes:nil
                                                         error:&error])
    {
        NSLog(@"Create directory error: %@", error);
    }
} 

并通过各自的路径获取图像！！！

欲了解更多信息，请参阅：http://kmithi.blogspot.in/2012/08/ios-application-directory-structure.html