With this action you can check to see if a file with the given name exists. You select the file to check for (as a sting and including the extension) and the function will retrun true if it exists, and false if it does not. Note that this will return true if the file exists in the game bundle as an Included File or if the file has been saved out while the game was running (see the section on The File System for more information).
请注意，如果要将动作添加进 "if" 动作块，应该将它们放置到动作的侧边，如下图所示：
参数 描述 类型 The type of data to read, either a string (enclosed in quotes ""), or a real number
The above action block code will create a variable to hold buffer data and then check to see if a buffer save file has been made previously. If the file exists, then it is loaded into the buffer variable that we created, but if it doesn't exist, it is created, written to and then saved out ready for loading the next time.