ios - 如何使用全屏图像 ios 创建自定义 UIImagePickerController

Question

我有一个简单的 UIImagePickerController，它将使用相机拍照，但我希望它做几件事:

• 拥有自定义相机用户界面
• 采用全屏而不是 480x640(如果是 4 英寸手机)

这是我显示 UIImagePickerController 的代码:

- (IBAction)pick:(id)sender {
    NSLog(@"abc");
    picker = [[UIImagePickerController alloc] init];
    if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
        [picker setSourceType:UIImagePickerControllerSourceTypeCamera];
    } else {
        [picker setSourceType:UIImagePickerControllerSourceTypePhotoLibrary];
    }
    [picker setDelegate:self];
    [self presentViewController:picker animated:YES completion:nil];

}

这是拍摄图像的时间:

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
    [self dismissViewControllerAnimated:YES completion:nil];
    UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
    [imageView setImage:image];
}

我该怎么做？

谢谢

Answer 1

对于第一个要点，我想您可以使用 UIImagePickerController 对象的 cameraOverlayView 属性在选择器默认界面上添加您的自定义 UI:

- (IBAction)pick:(id)sender {
    NSLog(@"abc");
    picker = [[UIImagePickerController alloc] init];
    if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
        [picker setSourceType:UIImagePickerControllerSourceTypeCamera];
    } else {
        [picker setSourceType:UIImagePickerControllerSourceTypePhotoLibrary];
    }

    // Add here your custom UI here
    [picker setCameraOverlayView:self.customCameraOverlayView];

    [picker setDelegate:self];
    [self presentViewController:picker animated:YES completion:nil];

}

编辑

我已经测试了 UIImagePickerController，它返回了完整尺寸的图像(PixelXDimension 和 PixelYDimension):

 UIImagePickerControllerMediaMetadata =     {
        DPIHeight = 72;
        DPIWidth = 72;
        Orientation = 6;
        "{Exif}" =         {
            ApertureValue = "2.526068811667588";
            BrightnessValue = "-0.5779073354035674";
            ColorSpace = 1;
            DateTimeDigitized = "2013:04:07 22:30:03";
            DateTimeOriginal = "2013:04:07 22:30:03";
            ExposureMode = 0;
            ExposureProgram = 2;
            ExposureTime = "0.05882352941176471";
            FNumber = "2.4";
            Flash = 24;
            FocalLenIn35mmFilm = 35;
            FocalLength = "4.28";
            ISOSpeedRatings =             (
                800
            );
            MeteringMode = 3;
            PixelXDimension = 3264;
            PixelYDimension = 2448;
            SceneType = 1;
            SensingMethod = 2;
            ShutterSpeedValue = "4.058893689053568";
            SubjectArea =             (
                1874,
                1478,
                610,
                612
            );
            WhiteBalance = 0;
        };
        "{TIFF}" =         {
            DateTime = "2013:04:07 22:30:03";
            Make = Apple;
            Model = "iPhone 4S";
            Software = "6.1.3";
            XResolution = 72;
            YResolution = 72;
        };
    };

编辑

您还可以将内容模式设置为 ImageView 以调整大小并适合容器 View :

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
    [self dismissViewControllerAnimated:YES completion:nil];
    UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
    [imageView setContentMode:UIViewContentModeScaleAspectFill];
    [imageView setImage:image];
}

然后使用 auto layout 或 auto 根据需要在考虑设备屏幕(4 英寸或非 4 英寸)的 View Controller 中适应 imageView sizing 。