resolve a memory leak
resolve a memory leak

KBvsMJ/JNWSpringAnimation,jwilling/JNWSpringAnimation,MaWenxing/JNWSpringAnimation,dourgulf/JNWSpringAnimation,taolong001/JNWSpringAnimation,yariksmirnov/JNWSpringAnimation,bb-coder/JNWSpringAnimation,allpepo/JNWSpringAnimation