Persistent storage of data in unity

Unity provides the Playerprefs class for storing game data on a computer's hard drive. This class has 10 functions that can be used

Class Functionsclass Functions

• Setintsets the value of the preference identified by key.
  Sets the value of the parameter determined by key.
• Getintreturns the value corresponding to key in the preference file if it exists.
  If present, returns the value corresponding to the key in the preference file.
• Setfloatsets the value of the preference identified by key.
  Sets the value of the parameter determined by key.
• Getfloatreturns the value corresponding to key in the preference file if it exists.
  If present, returns the value corresponding to key in the game archive file.
• Setstringsets the value of the preference identified by key.
  Sets the value of the parameter determined by key.
• Getstringreturns the value corresponding to key in the preference file if it exists.
  If present, returns the value corresponding to key in the game archive file.
• Haskeyreturns true if key exists in the preferences.
  Returns true if key exists in the game archive.
• Deletekeyremoves key and its corresponding value from the preferences.
  Removes the key and its corresponding value from the game archive.
• Deleteallremoves all keys and values from the preferences. Use with caution.
  Remove all keys from your preferences. Please use it carefully.
• Savewrites all modified preferences to disk.
  Write all modification parameters to the hard disk.

The data saved by the Playerprefs class function is saved to the hard disk as a collection of key-value pairs.

Where the first parameter of the Set class function is a string representing the name of the data to be set, the second parameter depends on the type of data to be saved. If you want to save a floating-point data with the name Playerscore, you should write it like this:

PlayerPrefs.SetFloat("Player Score", 10.5);

同样的如果想要博存的是int 类型的数据或者  string类型的数据，那么只需要把第二个参数指定为相应的类型就可以了。



关于get 类函数参数也有两个。第一个必须是 sting 类型的参数，表示你要取出的值对应的键名称，第二个参数则表示 如果没找到对应的键的情况下返回的默认值，下面是 一个例子：

print (PlayerPrefs.GetString("Player Name","没找到，我是默认返回值"));

像这样，如果买有找到 PlayerName 这个键 ，那么将会在控制台 打印"没找到，我是默认返回值"

还用两个常用的函数；

//删除 PlayerPrefs 中某一个key的值

Playerprefs. deletekey ("key"); //Determine if this key exists in the Playerprefsbool b = playerprefs. Haskey("key");

欢迎志同道合的朋友一起学习， 一起进步。

Persistent storage of data in unity