求iOS方面大神解决一下这个Unity的问题

把unity5.4的打包成iOS，在Xcode上运行，在网上找了代码，可以正常调起unity，首次启动之后，暂停隐藏unity，再次启动就出问题了。
2016-08-02 14:00:38.522 test1[1686:754897] DEBUG/AR(1686) Could not find a UIView with CAEAGLLayer or CAMetalLayer layer class that responds to selector renderFrameVuforia
2016-08-02 14:00:38.522 test1[1686:754897] DEBUG/AR(1686) UIView has CAMetalLayer layer class
2016-08-02 14:00:38.522 test1[1686:754897] DEBUG/AR(1686) UIView does not respond to selector renderFrameVuforia
2016-08-02 14:00:38.522 test1[1686:754897] DEBUG/AR(1686) UIView has CAMetalLayer layer class
2016-08-02 14:00:38.523 test1[1686:754897] DEBUG/AR(1686) UIView does not respond to selector renderFrameVuforia
2016-08-02 14:00:38.523 test1[1686:754897] DEBUG/AR(1686) Could not find a UIView with CAEAGLLayer or CAMetalLayer layer class that responds to selector renderFrameVuforia
2016-08-02 14:00:38.523 test1[1686:754897] DEBUG/AR(1686) UIView has CAMetalLayer layer class
2016-08-02 14:00:38.523 test1[1686:754897] DEBUG/AR(1686) UIView does not respond to selector renderFrameVuforia
2016-08-02 14:00:38.524 test1[1686:754897] DEBUG/AR(1686) UIView has CAMetalLayer layer class
2016-08-02 14:00:38.524 test1[1686:754897] DEBUG/AR(1686) UIView does not respond to selector renderFrameVuforia
2016-08-02 14:00:38.525 test1[1686:754897] DEBUG/AR(1686) Could not find a UIView with CAEAGLLayer or CAMetalLayer layer class that responds to selector renderFrameVuforia
2016-08-02 14:00:38.525 test1[1686:754897] DEBUG/AR(1686) UIView has CAMetalLayer layer class
2016-08-02 14:00:38.525 test1[1686:754897] DEBUG/AR(1686) UIView does not respond to selector renderFrameVuforia
2016-08-02 14:00:38.526 test1[1686:754897] DEBUG/AR(1686) UIView has CAMetalLayer layer class
2016-08-02 14:00:38.527 test1[1686:754897] DEBUG/AR(1686) UIView does not respond to selector renderFrameVuforia
2016-08-02 14:00:38.527 test1[1686:754897] DEBUG/AR(1686) Could not find a UIView with CAEAGLLayer or CAMetalLayer layer class that responds to selector renderFrameVuforia
2016-08-02 14:00:38.527 test1[1686:754897] DEBUG/AR(1686) UIView has CAMetalLayer layer class
2016-08-02 14:00:38.527 test1[1686:754897] DEBUG/AR(1686) UIView does not respond to selector renderFrameVuforia
2016-08-02 14:00:38.528 test1[1686:754897] DEBUG/AR(1686) UIView has CAMetalLayer layer class
2016-08-02 14:00:38.528 test1[1686:754897] DEBUG/AR(1686) UIView does not respond to selector renderFrameVuforia
2016-08-02 14:00:38.528 test1[1686:754897] DEBUG/AR(1686) Could not find a UIView with CAEAGLLayer or CAMetalLayer layer class that responds to selector renderFrameVuforia

求助啊，，，，

问题大概是，点再次启动之后，Unity没有第一时间推出来，需要再触摸一下屏幕才可以

有人么