将两个UIImage并排保存为一个组合图像? [英] Saving two UIImages side-by-side as one combined image?

问题描述

Xcode 5，iOS 7

Xcode 5, iOS 7

两个UIView并排放置-viewA和viewB.每个视图都包含一个UIImage-imageA和imageB.这两个图像在视图之间的边界处相遇，因此它们看起来是无缝的:imageAimageB.

Two UIViews side-by-side - viewA and viewB. Each view contains a UIImage - imageA and imageB. Both images meet at border between the views so that they appear seamless:imageAimageB.

如何将两个图像并排保存到一个图像文件中，就像它们是一个图像一样?

How can I save the two images into a single image file, side-by-side, as though they were one image?

我知道我可以截取屏幕截图，但这会降低分辨率，并且不会考虑到屏幕外部分图像(由于缩放或定位).

I know I could take a screenshot, but that would lower the resolution, and would not account for portions of the images which may be off-screen (due to scaling or positioning).

这可能会回答我自己的问题，但是我能想到的最好的办法是创建一个新的UIImage(imageC)，调整其大小以适应imageA和imageB，然后根据它们的相对位置将这些图像复制到imageC中.

This may answer my own question but the best I can think of to create a new UIImage (imageC), size it to account for imageA and imageB, then copy the images into imageC based on their relative positions.

有没有更简单的方法?

推荐答案

在界面中使用2个UIImageView，对每个图像使用UIImagePicker之后，可以使用以下代码进行调试:

using 2 UIImageView in you interface, after using the UIImagePicker for each, you can marge with this code:

    - (IBAction)margeSave:(id)sender{

        //here you get you two different image

        UIImage *bottomImage = self.imageViewPick.image;
        UIImage *image       = self.myImage.image;

        //here  you have to crop each image with the code below
        //using here a crop code and adjust for your Image

        // create a new size for a merged image

        CGSize newSize = CGSizeMake(640, 640);
        UIGraphicsBeginImageContext( newSize );

        [bottomImage drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];

        [myImage drawInRect:CGRectMake(0,0,newSize.width,newSize.height) blendMode:kCGBlendModeNormal alpha:1.0];

        UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();

        UIGraphicsEndImageContext();

        UIImageWriteToSavedPhotosAlbum(newImage, nil, nil, nil);

        //option if you are in other view when save
        //[self.navigationController popViewControllerAnimated:YES];


    }

您可以集成以下代码来裁剪图像:

You can integrate this code to crop a image:

在InterfaceBuilder中使用图像的2部分以所需的特定大小进行拾取，例如在iPhone上使用2 UIImageView W:150 H:300 总共il 300x300 ，并使用尺寸合适的裁剪图像.

in InterfaceBuilder using 2 part of image for picking with the specific size you want, for example on iPhone using 2 UIImageView W:150 H:300 total il a 300x300 and using a crop image with size.

CGRect clippedRect  = CGRectMake(self.view.frame.origin.x+91, self.view.frame.origin.y, self.view.frame.size.width-91*2, self.view.frame.size.height-220);
CGImageRef imageRef = CGImageCreateWithImageInRect([image CGImage], clippedRect);
UIImage *imageCrop   = [UIImage imageWithCGImage:imageRef];
CGImageRelease(imageRef);

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