Swift OS X NSTouch Phase rawInput 到字符串？

【问题标题】：Swift OS X NSTouch Phase rawInput to String?Swift OS X NSTouch Phase rawInput 到字符串？
【发布时间】：2017-08-03 01:54:43
【问题描述】：

似乎无法打印触摸阶段的字符串值试过这个：

let phase = NSTouch.Phase(rawValue: touch.phase.rawValue)            
print(phase)

let touches = event.touches(matching: NSTouch.Phase.ended, in: self.view)
touches.forEach { (touch) in
   print("???????? touch up \(touch.phase)")
}

我得到的输出是这样的

Phase(rawValue: 8)
????????﹣ touch up Phase(rawValue: 8)

【问题讨论】：

标签： swift uitouch nstouch

【解决方案1】：

不是一个漂亮的方法：

print("Began", String(describing: NSTouch.Phase.began))
print("Ended", String(describing: NSTouch.Phase.ended))
print("Moved", String(describing: NSTouch.Phase.moved))
print("Stationary", String(describing: NSTouch.Phase.stationary))
print("Touching", String(describing: NSTouch.Phase.touching))
print("Cancelled", String(describing: NSTouch.Phase.cancelled))

结果帮助产生了这个：

let phases = [
            "1":"Began",
            "2":"Moved",
            "4":"Stationary",
            "7":"Touching",
            "8":"Ending",
            "16":"Cancelled"
]

let phase = phases["\(touch.phase.rawValue)"]
print("? Finger touch down \(phase)")

【讨论】：