如何知道照片是横向还是纵向模式？

发布于 2024-10-15 07:09:49 字数 59 浏览 1 评论 0 原文

我从 iPhone/iPad 库中加载照片，大部分都是纵向模式，我想知道如何查看横向或纵向模式下的照片？

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爱格式化 2024-10-22 07:09:49

使用 UIImage 实例的 imageOrientation 属性。它将返回您之一这些常量。

示例：

UIImage *image = // 从库加载

if (image.imageOrientation == UIImageOrientationUp) {
    NSLog(@"portrait");
} else if (image.imageOrientation == UIImageOrientationLeft || image.imageOrientation == UIImageOrientationRight) {
    NSLog(@"landscape");
}

Use the imageOrientation property of UIImage instances. It is going to return you one of these constants.

Example:

UIImage *image = // loaded from library

if (image.imageOrientation == UIImageOrientationUp) {
    NSLog(@"portrait");
} else if (image.imageOrientation == UIImageOrientationLeft || image.imageOrientation == UIImageOrientationRight) {
    NSLog(@"landscape");
}

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悲念泪 2024-10-22 07:09:49

我在运行 iOS 5.0 的 iPhone 4 上的数十张实际图片上测试了这段代码，并成功地将它们全部设为纵向模式。这就是修复/检查的方法

if (image.imageOrientation == UIImageOrientationUp ||
        image.imageOrientation == UIImageOrientationDown )
    {
        NSLog(@"Image is in Landscape Fix it to portrait ....");

        backgroundView.frame = self.view.bounds;
        backgroundView.autoresizingMask=UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight;
        backgroundView.contentMode = UIViewContentModeScaleAspectFill;
    }
    else
    {
        NSLog(@"Image is in Portrait everything is fine ...");
    }

这是进行此检查的一种万无一失的方法

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

    // Get the data for the image
    NSData* imageData = UIImageJPEGRepresentation(image, 1.0);




    if ([UIImage imageWithData:imageData].size.width >  [UIImage imageWithData:imageData].size.height)
    {
        NSLog(@"Select Image is in Landscape Mode ....");

    }
    else
    {
        NSLog(@"Select Image is in Portrait Mode ...");

    }
}

I tested this piece of code on tens of actual picture on iPhone 4 running iOS 5.0 and was able to successfully make them all in portrait mode. This is how you fix/check

if (image.imageOrientation == UIImageOrientationUp ||
        image.imageOrientation == UIImageOrientationDown )
    {
        NSLog(@"Image is in Landscape Fix it to portrait ....");

        backgroundView.frame = self.view.bounds;
        backgroundView.autoresizingMask=UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight;
        backgroundView.contentMode = UIViewContentModeScaleAspectFill;
    }
    else
    {
        NSLog(@"Image is in Portrait everything is fine ...");
    }

Here is a fool proof way of doing this check

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

    // Get the data for the image
    NSData* imageData = UIImageJPEGRepresentation(image, 1.0);




    if ([UIImage imageWithData:imageData].size.width >  [UIImage imageWithData:imageData].size.height)
    {
        NSLog(@"Select Image is in Landscape Mode ....");

    }
    else
    {
        NSLog(@"Select Image is in Portrait Mode ...");

    }
}

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