unity截圖方法

using System.Runtime.InteropServices;
using UnityEngine;
using UnityEngine.UI;

public class Screenshots : MonoBehaviour
{
    [DllImport("__Internal")]
    private static extern void _SavePhoto(string readAddr);

    public RawImage rimg;
    WebCamTexture wbct;
    string path_save;
    string path_read;
    void Start()
    {
        wbct = new WebCamTexture();
        for (int i = 0; i < WebCamTexture.devices.Length; i++)
        {
            if (!WebCamTexture.devices[i].isFrontFacing)
            {
                wbct.deviceName = WebCamTexture.devices[i].name;
                break;
            }
        }
        rimg.gameObject.SetActive(false);
    }
    public void startScreenshots()
    {
        rimg.gameObject.SetActive(true);
        rimg.texture = wbct;
        wbct.Play();
    }
    public void Screenshoting()
    {
        wbct.Pause();
        System.DateTime now = System.DateTime.Now;
        string filename = string.Format("image{0}{1}{2}{3}{4}.png", now.Year, now.Month, now.Day, now.Hour, now.Minute, now.Second);
        path_save = filename;
        path_read = Application.persistentDataPath + "/" + path_save;
        ScreenCapture.CaptureScreenshot(path_save);
        _SavePhoto(path_read);
    }
}
 

 在xcode中新建檔案

選擇標頭檔案Header File，命名為PhotoManager，新增程式碼如下：

#import <Foundation/Foundation.h>

@interface PhotoManager : NSObject
- ( void ) imageSaved: ( UIImage *) image didFinishSavingWithError:( NSError *)error
          contextInfo: ( void *) contextInfo;
@end

再新建檔案，選擇執行檔案Objective-C File

#import "PhotoManager.h"
@implementation PhotoManager
- ( void ) imageSaved: ( UIImage *) image didFinishSavingWithError:( NSError *)error
          contextInfo: ( void *) contextInfo
{
    NSLog(@"儲存結束");
    if (error != nil) {
        NSLog(@"有錯誤");
    }
}
void _SavePhoto(char *readAddr)
{
    NSString *strReadAddr = [NSString stringWithUTF8String:readAddr];
    UIImage *img = [UIImage imageWithContentsOfFile:strReadAddr];
    NSLog([NSString stringWithFormat:@"w:%f, h:%f", img.size.width, img.size.height]);
    PhotoManager *instance = [PhotoManager alloc];
    UIImageWriteToSavedPhotosAlbum(img, instance,
                                   @selector(imageSaved:didFinishSavingWithError:contextInfo:), nil);
}
@end
 

然後在Info介面，Custom iOS Target Properties下點選 + 號新增相機許可權，如下圖所示： 

選擇 Privacy-Camera Usage Description(使用相機許可權)，並在後面新增提示：使用相機（可任意）。  再點選 + 號新增相簿許可權，選擇Privacy-Photo Library Additions Usage Description（相簿新增許可權），並在後面新增提示：使用相簿（可任意）。