doc

doc/demo14_file/file.md

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+![Image text](image/file1.png)
+![Image text](image/file2.png)
+![Image text](image/file3.png)
+![Image text](image/file4.png)
+![Image text](image/file5.png)
+![Image text](image/file6.png)
+![Image text](image/file7.png)

doc/demo14_file/image/file1.png.import

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doc/demo14_file/image/file2.png.import

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doc/demo14_file/image/file3.png.import

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doc/demo14_file/image/file4.png.import

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doc/demo14_file/image/file5.png.import

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doc/demo14_file/image/file6.png.import

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doc/demo14_file/image/file7.png.import

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scene/demo14_file/file.tscn

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+[gd_scene load_steps=2 format=2]
+
+[ext_resource path="res://script/demo14_file/file.gd" type="Script" id=1]
+
+[node name="Node2D" type="Node2D"]
+script = ExtResource( 1 )

script/demo14_file/file.gd

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+extends Node2D
+
+const TimeUtils = preload("res://zfoo/scheduler/TimeUtils.gd")
+const FileUtils = preload("res://zfoo/util/FileUtils.gd")
+
+
+# Dictionary
+var content = "hello file!!!"
+
+# path string
+var filePath: String = "user://playerData.txt"
+
+
+func _ready() -> void:
+	print("Original Data: ", content)
+	self.loadData()
+	print("Altered Data: ", content)
+
+
+func saveData() -> void:
+
+	
+	FileUtils.writeStringToFile(filePath, content)
+
+
+func loadData() -> void:
+
+	content = FileUtils.readFileToString(filePath)
+
+
+func _notification(what):
+	if what == MainLoop.NOTIFICATION_WM_QUIT_REQUEST:
+		content = content + TimeUtils.currentTimeMillis() as String
+		self.saveData()
+		get_tree().quit() # quitting the game

zfoo/util/FileUtils.gd

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+extends Object
+
+const StringUtils = preload("res://zfoo/util/StringUtils.gd")
+
+# 以追加的方式写入一个content
+static func writeStringToFile(filePath: String, content: String) -> void:
+	var file = File.new()
+	file.open(filePath, File.WRITE)
+	# bread and butter
+	file.store_string(content)
+	file.close()
+	
+
+# 读取文件
+static func readFileToString(filePath: String) -> String:
+	var file = File.new()
+	# make sure our file exists on users system
+	if !file.file_exists(filePath):
+		return StringUtils.EMPTY
+	
+	# allow reading only for file
+	file.open(filePath, File.READ)
+	
+	var content = file.get_as_text()
+	file.close()
+	return content