not send same event.

noppefoxwolf · noppefoxwolf · commit 5a3b01d537ba · 2017-07-21T13:46:41.000+09:00
diff --git a/Sources/RxKeyboard.swift b/Sources/RxKeyboard.swift
@@ -58,7 +58,7 @@ public class RxKeyboard: NSObject {
       }
       .filter { state in state.isShowing }
       .map { state in state.visibleHeight }
-    self.didChangeVisibility = self.visibleHeight.map({ $0 != 0.0 })
+    self.didChangeVisibility = self.visibleHeight.map({ $0 != 0.0 }).distinctUntilChanged()
     super.init()
 
     // keyboard will change frame

Original file line number	Diff line number	Diff line change
`@@ -58,7 +58,7 @@ public class RxKeyboard: NSObject {`
`58`	`58`	`}`
`59`	`59`	`.filter { state in state.isShowing }`
`60`	`60`	`.map { state in state.visibleHeight }`
`61`		`- self.didChangeVisibility = self.visibleHeight.map({ $0 != 0.0 })`
	`61`	`+ self.didChangeVisibility = self.visibleHeight.map({ $0 != 0.0 }).distinctUntilChanged()`
`62`	`62`	`super.init()`
`63`	`63`
`64`	`64`	`// keyboard will change frame`