如何在我的应用程序中拍摄图像并将图像保存在 IOS 中？

Question

- (IBAction)btn_actionTakePicture:(UIButton *)sender {
    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
    picker.delegate = self;
    picker.allowsEditing = YES;
    picker.sourceType = UIImagePickerControllerSourceTypeCamera;

    [self presentViewController:picker animated:YES completion:NULL];

    //I want to know how to save the image into the UIImage *image = savingImage so that I can implement the next 2 lines

    UIImage *image = savingImage;
    UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);
}

最后两行代码依赖于获取我捕捉到的图像以保存在变量savingImage 中，那么我该如何实现呢？

Answer 1

您需要从 IBAction 中删除这两行并添加此功能

//UIImage *image = savingImage;
//UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);

PS。你的 UIImagePickerController *picker 需要是全局的 你可能会错过很多其他的东西。看看苹果的示例代码https://developer.apple.com/library/ios/samplecode/photopicker/Introduction/Intro.html

-(void)imagePickerController:(UIImagePickerController *)picker
      didFinishPickingImage : (UIImage *)image
                 editingInfo:(NSDictionary *)editingInfo
{

    NSLog(@"didFinishPickingImage ...");

    [picpicker dismissViewControllerAnimated:YES completion:nil];

    //save this image
    UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);

}

Answer 2

您可以使用 didFinishPickingMediaWithInfo。 来自官方文档：

要将静止图像保存到用户的相机胶卷相册，请从 imagePickerController:didFinishPickingMediaWithInfo: 方法的主体中调用 UIImageWriteToSavedPhotosAlbum 函数。

阅读更多：https://developer.apple.com/library/ios/documentation/uikit/reference/UIImagePickerControllerDelegate_Protocol/UIImagePickerControllerDelegate/UIImagePickerControllerDelegate.html

可能是这样的：

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
UIImage *img = [info objectForKey:UIImagePickerControllerOriginalImage];
UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);
}