Created
October 27, 2014 10:44
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| enum State: Int { | |
| case Init | |
| case Scrolling | |
| case Ready | |
| case Refreshing | |
| case End | |
| } | |
| struct Transition { | |
| var from: State | |
| var to: State | |
| var Condition: String | |
| var before: ()->() | |
| var after: ()->() | |
| } | |
| struct StateMachine { | |
| var initState = State.Init | |
| var currentState: State | |
| var transitions = [ | |
| Transition(from: State.Init, to: State.Scrolling, Condition: "drag", before: { | |
| println("before drag") | |
| }, after: { | |
| println("after drag") | |
| }), | |
| Transition(from: State.Scrolling, to: State.Ready, Condition: "top", before: { | |
| }, after: { | |
| }), | |
| Transition(from: State.Ready, to: State.Refreshing, Condition: "release", before: { | |
| }, after: { | |
| }), | |
| Transition(from: State.Refreshing, to: State.End, Condition: "second", before: { | |
| }, after: { | |
| }) | |
| ] | |
| func isCurrentState(state: State) -> Bool { | |
| if state == currentState { | |
| return true | |
| } else { | |
| return false | |
| } | |
| } | |
| // 表示转移事件是否能在当前状态下触发 | |
| func isInvoked(transition: Transition) -> Bool { | |
| if transition.from == currentState { | |
| return true | |
| } else { | |
| return false | |
| } | |
| } | |
| } |
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