Question

如何获取捕获图像的设备路径？我正在显示图像，下面我关闭时切换我从项目显示默认图像，当我打开时我想显示用户捕获的图像。在捕获功能中，我可以将图像设置为我的imageView

#pragma mark - UIImagePickerControllerDelegate
- (void)imagePickerController:(UIImagePickerController *)picker
didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    [self dismissViewControllerAnimated:YES completion:NULL];
    NSLog(@"%@", info);
    UIImage * imageTemp = [info objectForKey:UIImagePickerControllerEditedImage];

    if (imageTemp == nil)
        imageTemp = [info objectForKey:UIImagePickerControllerOriginalImage];
    [self.image setImage:imageTemp];
}

它将图像设置为imageview但我没有路径。我有打印信息，它看起来像

{
    UIImagePickerControllerMediaMetadata =     {
        DPIHeight = 72;
        DPIWidth = 72;
        Orientation = 6;
        "{Exif}" =         {
            ApertureValue = "2.526068811667588";
            BrightnessValue = "5.667090406070278";
            ColorSpace = 1;
            DateTimeDigitized = "2013:05:14 01:02:48";
            DateTimeOriginal = "2013:05:14 01:02:48";
            ExposureMode = 0;
            ExposureProgram = 2;
            ExposureTime = "0.008620689655172414";
            FNumber = "2.4";
            Flash = 25;
            FocalLenIn35mmFilm = 35;
            FocalLength = "4.28";
            ISOSpeedRatings =             (
                50
            );
            MeteringMode = 5;
            PixelXDimension = 3264;
            PixelYDimension = 2448;
            SceneType = 1;
            SensingMethod = 2;
            ShutterSpeedValue = "6.862622389675391";
            SubjectArea =             (
                1631,
                1223,
                881,
                881
            );
            WhiteBalance = 0;
        };
        "{TIFF}" =         {
            DateTime = "2013:05:14 01:02:48";
            Make = Apple;
            Model = "iPhone 4S";
            Software = "6.1.3";
            XResolution = 72;
            YResolution = 72;
        };
    };
    UIImagePickerControllerMediaType = "public.image";
    UIImagePickerControllerOriginalImage = "<UIImage: 0x20ac0470>";
}

但我找不到任何可以用来寻找路径的东西。如何查找路径o图像，以便我可以再次重新加载相同的图像？

Answer 1

如果您想在应用中的后续阶段使用此图片，则必须保存图片的网址。

如果要提取图像URL和图像名称，可以在当前实现的委托方法中自行完成。 NSDictionary信息包含有关图像的所有信息。

#pragma mark - UIImagePickerControllerDelegate

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

    NSURL *imagePath = [info objectForKey:@"UIImagePickerControllerReferenceURL"];
    NSString *imageName = [imagePath lastPathComponent];
}

您可以在imagePath

内的此阶段使用didFinishPickingMediaWithInfo:保存图片

Answer 2

我认为您无法找到捕获图像的路径，因为如果您从代码中捕获图像，iPhone就不会将其保存到文件中。在我看来，你有两种方式：

1）您可以创建一个单例类来记住变量中的UIImage，并且可以访问它。

2）您可以将捕获的图像保存到缓存文件夹中的文件中，然后获取它的路径;

如何找到图像的路径，以便我可以再次重新加载相同的图像？

2 个答案: