BS 0.1 基础构建完成 / 0.2 Visual 同为Unity UI控件部分

Convention/[ES3]/Easy Save 3/Scripts/Streams/ES3PlayerPrefsStream.cs

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+using System.IO;
+using UnityEngine;
+
+namespace ES3Internal
+{
+	internal class ES3PlayerPrefsStream : MemoryStream
+	{
+		private string path;
+		private bool append;
+		private bool isWriteStream = false;
+		private bool isDisposed = false;
+
+		// This constructor should be used for read streams only.
+		public ES3PlayerPrefsStream(string path) : base(GetData(path,false))
+		{
+			this.path = path;
+			this.append = false;
+		}
+
+		// This constructor should be used for write streams only.
+		public ES3PlayerPrefsStream(string path, int bufferSize, bool append=false) : base(bufferSize)
+		{
+			this.path = path;
+			this.append = append;
+			this.isWriteStream = true;
+		}
+
+		private static byte[] GetData(string path, bool isWriteStream)
+		{
+			if(!PlayerPrefs.HasKey(path))
+				throw new FileNotFoundException("File \""+path+"\" could not be found in PlayerPrefs");
+			return System.Convert.FromBase64String(PlayerPrefs.GetString(path));
+		}
+
+		protected override void Dispose (bool disposing)
+		{
+			if(isDisposed)
+				return;
+			isDisposed = true;
+			if(isWriteStream && this.Length > 0)
+			{
+	            if (append)
+	            {
+	                // Convert data back to bytes before appending, as appending Base-64 strings directly can corrupt the data.
+	                var sourceBytes = System.Convert.FromBase64String(PlayerPrefs.GetString(path));
+	                var appendBytes = this.ToArray();
+	                var finalBytes = new byte[sourceBytes.Length + appendBytes.Length];
+	                System.Buffer.BlockCopy(sourceBytes, 0, finalBytes, 0, sourceBytes.Length);
+	                System.Buffer.BlockCopy(appendBytes, 0, finalBytes, sourceBytes.Length, appendBytes.Length);
+
+					PlayerPrefs.SetString(path, System.Convert.ToBase64String(finalBytes));
+
+					PlayerPrefs.Save();
+	            }
+	            else
+					PlayerPrefs.SetString(path + ES3IO.temporaryFileSuffix, System.Convert.ToBase64String(this.ToArray()));
+				// Save the timestamp to a separate key.
+				PlayerPrefs.SetString("timestamp_" + path, System.DateTime.UtcNow.Ticks.ToString());
+			}
+			base.Dispose(disposing);
+		}
+	}
+}