State machine framework

FSM - Fnite state machine（ Finite state machine ）
State nesting ： Substate
1. Duplicate state names are not allowed
2. Simulate animation state machine
3. Conditions （ add to 、 Delete 、 modify 、 lookup ）
4. Judge whether the transition state is satisfied
5. State event （ Enter the state of 、 In state 、 Out of state ）

state （ Unlimited Nesting 、 State or state machine , The default state is normal ）

Entering and leaving the state machine

Check whether the current state meets the transition conditions , Make a transition

Prevent update status binding errors

First step 、 Create a state machine and establish a containment relationship
The second step 、 Create a parameter 、 In order to set the conditions later
The third step 、 Create transition relationships between States
Step four 、 Set status events
Step five 、 Enter the total state machine