拍照后编辑图像 [英] Edit image after taking a picture

问题描述

我目前正在制作一款iphone应用程序，用户可以在其中拍摄照片或从相册中选择照片，然后在图像上方放置一个叠加层。然后，用户可以缩放，旋转和保存图像。目前，我可以拍照，或者为相册选择一张。至于叠加层，我只使用了UIImageView并将它放在Interface builder中的层次结构之上。对于相机，我正在使用此代码：

I'm currently making an iphone app where the user takes a photo or select it from an album, then an overlay is placed over the image. The user can then scale, rotate and save the image. Currently, I can take pictures, or choose one for the album. As for the overlay, I just used UIImageView and placed it on top of the hierarchy in Interface builder. For the camera, I'm using this code:

-(IBAction)getPhoto:(id)sender  {

// Create an image picker controller
UIImagePickerController * imagePicker = [[UIImagePickerController alloc] init];


if((UIButton *) sender == choosePhotoBtn)   {
    // Set source to photo albums
    imagePicker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
}

else    {
    // Set source to camera
    imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
    imagePicker.showsCameraControls = YES;
}

// Delegate is self
imagePicker.delegate = self;

    // Allow editing of image
    imagePicker.allowsEditing = YES;

    // Show image picker
    [self presentModalViewController:imagePicker animated: YES];
}

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info   {
// Dismiss modalviewcontroller
[picker dismissModalViewControllerAnimated:YES];

// Displaying image to the imageView
imageView.image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];

// Access the uncropped image from info dictionary
UIImage * image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];


// Save Image
UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);

[picker release];
}

我现在遇到的问题是编辑后的照片拍摄。如何自定义相机的行为？：

The problem I'm having right now, is editing the photo after it's being taken. How do I customise the camera to behave like this?:

1. 选择使用相机或从相册中获取照片

1. Choose either use the camera or getting the photo from the album

一旦选择，叠加图像将变为我在脸部放置圆圈的图像，照片将像面具一样在下面。此视图也可以全屏编辑。您可以旋转，缩放和移动图像，直到您单击完成。

Once chosen, the overlay image will change to a one where I've put a "circle" in the face, and the photo will be underneath like a mask. This view will also be able to edit in full screen. You can rotate, scale and move the image until you click done.

我在手册中已阅读此部分但我似乎无法理解如何使用它。 http://developer.apple.com/library/ios/# documentation / UIKit / Reference / UIImagePickerController_Class / UIImagePickerController / UIImagePickerController.html

I've read this part in the manual but I can't seem to understand how to use it. http://developer.apple.com/library/ios/#documentation/UIKit/Reference/UIImagePickerController_Class/UIImagePickerController/UIImagePickerController.html

希望有人能指出我正确的方向。

Hope someone can point me to the right direction.

非常感谢。
-Hakimo

Thanks very much. -Hakimo

推荐答案

有一种方法不要改变你的代码：

there's a way don't change your code much:

- (IBAction)takePicture:(id)sender {
UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
    [imagePicker setSourceType:UIImagePickerControllerSourceTypeCamera];
} else {
    [imagePicker setSourceType:UIImagePickerControllerSourceTypePhotoLibrary];
}

[imagePicker setAllowsEditing:YES];
[imagePicker setDelegate:self];

//place image picker on the screen
[self presentViewController:imagePicker animated:YES completion:nil];
}

如果要使用编辑后的图像，请更改UIImagePickerControllerOriginalImage到UIImagePickerControllerEditedImage，就是这样！

If you want to use the image that after editing, please change "UIImagePickerControllerOriginalImage" to "UIImagePickerControllerEditedImage", that's it!

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