iphone - 允许用户在 UIImagePickerController 中以纵向视图尺寸拍摄图片

Question

我的应用程序仅在纵向视图中。

我正在从相机拍摄图像并将其显示到图像视图中UIImagePickerController。现在，如果我旋转设备，它会在横向视图中拍摄照片，并且图像尺寸从1936*2592（即纵向）变为2592*1936.

现在我想在我的纵向视图中显示相同的图像，就像默认相机一样。

请告诉我我该怎么做？
还是可以UIImagePicker只锁定纵向？

Answer 1

您可以调整图像大小

- (UIImage *)imageByScalingToSize:(CGSize)targetSize
{

    UIImage *sourceImage = yourImage;
    UIImage *newImage = nil;

    CGFloat targetWidth = targetSize.width;
    CGFloat targetHeight = targetSize.height;

    //   CGFloat scaleFactor = 0.0;
    CGFloat scaledWidth = targetWidth;
    CGFloat scaledHeight = targetHeight;

    CGPoint thumbnailPoint = CGPointMake(0.0,0.0);

    // this is actually the interesting part:

    UIGraphicsBeginImageContext(targetSize);

    CGRect thumbnailRect = CGRectZero;
    thumbnailRect.origin = thumbnailPoint;
    thumbnailRect.size.width  = scaledWidth;
    thumbnailRect.size.height = scaledHeight;

    [sourceImage drawInRect:thumbnailRect];

    newImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    if(newImage == nil) NSLog(@"could not scale image");


    return newImage ;
}