首先說一下安卓：首先在相簿裡建立一個檔案，然後將圖片存入。

程式碼：

using UnityEngine;
using System.Collections;
using System.IO;

public class SavaPicture : MonoBehaviour {

	// Use this for initialization
	void Start () {
        //儲存圖片
        StartCoroutine(LoadImg());
    }
    IEnumerator LoadImg()
    {
        WWW www = new WWW("https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1498635837686&di=cc15b088c3c1376d724891abd74736b1&imgtype=0&src=http%3A%2F%2Fk2.jsqq.net%2Fuploads%2Fallimg%2F1705%2F7_170524143440_5.jpg");
        yield return www;

        
        Texture2D texture2D = www.texture;
        byte[] bytes = texture2D.EncodeToPNG();
        string fileName = "二維碼.png";
        string path;
       
        //安卓平臺
        else if (Application.platform == RuntimePlatform.Android)
        {
            string destination = "/sdcard/DCIM/棋牌";
            //判斷目錄是否存在，不存在則會建立目錄  
            if (!Directory.Exists(destination))
            {
                Directory.CreateDirectory(destination);
            }
            path = destination + "/" + fileName;
            //存圖片  
            System.IO.File.WriteAllBytes(path, bytes);
        }
        //電腦端
        else
        {
            path = Application.dataPath + "/" + fileName;
            FileStream fs = new FileStream(path, FileMode.Create);
            fs.Write(bytes, 0, bytes.Length);
            fs.Flush();
            fs.Close();
        }
        Debug.Log(path);
    }
}
 

下面說一下蘋果：

PhotoManager.h 檔案內容

#import <Foundation/Foundation.h>

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

#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");
    }
}
@end

extern "C" {
void _SavePhoto(char *readAddr)
{
    NSString *strReadAddr = [NSString stringWithUTF8String:readAddr];
    UIImage *img = [UIImage imageWithContentsOfFile:strReadAddr];
    PhotoManager *instance = [PhotoManager alloc];
    UIImageWriteToSavedPhotosAlbum(img, instance,
                                   @selector(imageSaved:didFinishSavingWithError:contextInfo:), nil);
}
}

 

新增相簿許可權：

相簿許可權： Privacy - Photo Library Usage Description 是否允許此App訪問你的媒體資料庫？

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