From 9cdd415eef01e07bbc2e715cf1dde82045aa0833 Mon Sep 17 00:00:00 2001
From: kevinzhow <kevinchou.c@gmail.com>
Date: Mon, 4 May 2015 15:47:23 +0800
Subject: [PATCH] remove conversation button and fix a crash bug because of
 less message id

---
 Yep/Views/AudioWaves/Waver.swift | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/Yep/Views/AudioWaves/Waver.swift b/Yep/Views/AudioWaves/Waver.swift
index c0559d85..60b14cca 100644
--- a/Yep/Views/AudioWaves/Waver.swift
+++ b/Yep/Views/AudioWaves/Waver.swift
@@ -18,6 +18,8 @@ class Waver: UIView {
     
     private var phase: CGFloat = 0
     
+    var presented = false
+    
     var level: CGFloat! {
         didSet {
             self.phase+=self.phaseShift; // Move the wave
@@ -133,7 +135,9 @@ class Waver: UIView {
     }
     
     func callbackWaver() {
-        waverCallback!(waver: self)
+        if presented {
+            waverCallback!(waver: self)
+        }
     }
     
     private func updateMeters() {
@@ -229,6 +233,15 @@ class Waver: UIView {
         waveSamples = [CGFloat]()
     }
     
+    override func didMoveToSuperview() {
+        super.didMoveToSuperview()
+        self.presented = true
+    }
+    
+    override func removeFromSuperview() {
+        super.removeFromSuperview()
+        self.presented = false
+    }
     /*
     // Only override drawRect: if you perform custom drawing.
     // An empty implementation adversely affects performance during animation.