Ctrl + Shift + Q quick positioning method
Print
print(),debug.log();
error, console
Variable
(local var declaration), still used globally, private, public, int, float, string, bool
If there are special characters involved in the characters, use "\" to process
Operators:
Basic Operators, Logical Operators, Accumulation, Subtraction, Assignment
Object, game object
(the parent class to the child class is converted to empty (null), the child class to the parent class can be converted)
判断条件（if(){}, if(){}else if() {} else{}）
for loop use
break , continue
switch statement
array
ArrayList array usage
function
Use of enumeration types
class introduction
class inheritance
Abstract classes and encapsulation of classes
Virtual,override
Overload
Delegate unified control of multiple controls
Singleton mode (unified management, in-game data or unified management of in-game sounds)
