ios - 从应用程序保存图片

Question

我正在尝试让我的应用程序打开相机应用程序以拍摄保存照片。

我正在从我的应用程序中启动相机应用程序以使用以下代码拍照:

-(IBAction)TakePhoto:(id)sender {

    picker = [[UIImagePickerController alloc] init];
    picker.delegate = self;
    [picker setSourceType:UIImagePickerControllerSourceTypeCamera];
    [self presentViewController:picker animated:YES completion:NULL];
    [picker release];
    //save image??:
    //UIImageWriteToSavedPhotosAlbum(UIImage *image, id completionTarget, SEL completionSelector, void *contextInfo);
}

-(void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {

    image = [info objectForKey:UIImagePickerControllerOriginalImage];

    [self dismissViewControllerAnimated:YES completion:NULL];
}

-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {

    [self dismissViewControllerAnimated:YES completion:NULL];
}

我的问题是，一旦按下按钮，相机就会出现并允许我拍照。拍照后，会显示图像，我可以选择“重拍”或“使用”。我的问题是，如果我单击“使用”，图像不会保存到相机胶卷中。是否有可能保存图像并最终将“使用”按钮更改为“保存”？

谢谢你的帮助!

Answer 1

照片没有被保存，因为您实际上从未将保存图像的代码添加到 didFinishPickingMediaWithInfo: 委托(delegate)方法中。您所要做的就是将您在 TakePhoto: 中注释掉的行添加到此函数中，您就可以将照片保存到相机胶卷中。例如:

-(void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {

    image = [info objectForKey:UIImagePickerControllerOriginalImage];

    UIImageWriteToSavedPhotosAlbum(image, nil, nil, NULL);

    [self dismissViewControllerAnimated:YES completion:NULL];
}