diff --git a/src/gui/core/context.h b/src/gui/core/context.h
index 3c806655..9df5b6c3 100755
--- a/src/gui/core/context.h
+++ b/src/gui/core/context.h
@@ -16,6 +16,10 @@ public:
    Runnable(){
        run=nullptr;
    }
+   Runnable(const Runnable&b){
+       run=b.run;
+       ID=b.ID;
+   }
    Runnable(const std::function<void()>&f){
        run=f;
    }
diff --git a/src/gui/core/uieventsource.cc b/src/gui/core/uieventsource.cc
index c987a573..10ab48a4 100755
--- a/src/gui/core/uieventsource.cc
+++ b/src/gui/core/uieventsource.cc
@@ -29,10 +29,9 @@ int UIEventSource::handleEvents(){
     if(GraphDevice::getInstance().needCompose())
         GraphDevice::getInstance().ComposeSurfaces();
     if(hasDelayedRunners()){
-        size_t old=mRunnables.size();
         RUNNER runner=mRunnables.front();
         runner.run();
-        mRunnables.erase(mRunnables.begin());
+        mRunnables.pop_front(); 
     } 
     return 0;
 }
@@ -40,7 +39,7 @@ int UIEventSource::handleEvents(){
 void UIEventSource::post(Runnable& run,DWORD delayedtime){
     RUNNER runner;
     runner.time=SystemClock::uptimeMillis()+delayedtime;
-    runner.run.ID=mID++;
+    run.ID=mID++;
     runner.run=run;
     for(auto itr=mRunnables.begin();itr!=mRunnables.end();itr++){
         if(runner.time<itr->time){
diff --git a/tests/gui/looper_tests.cc b/tests/gui/looper_tests.cc
index 613a0d7a..eae4de24 100755
--- a/tests/gui/looper_tests.cc
+++ b/tests/gui/looper_tests.cc
@@ -5,6 +5,8 @@
 #include <core/systemclock.h>
 #include <cdlog.h>
 #include <functional>
+#include <core/uieventsource.h>
+
 class LOOPER:public testing::Test{
 
    public :
@@ -116,7 +118,14 @@ TEST_F(LOOPER,eventhandler){
 }
 TEST_F(LOOPER,loop){
    Looper loop(false);
-   loop.pollAll(1000);
-   loop.pollAll(1000);
-   loop.pollAll(1000);
+   UIEventSource*handler=new UIEventSource(nullptr);
+   loop.addEventHandler(handler);
+   Runnable run;
+   int count=0;
+   run=[&](){
+       printf("count=%d\r\n",count++);
+       handler->post(run,count++);
+   };
+   handler->post(run,10);
+   while(1)loop.pollAll(100);
 }