demo中的点播时设置title导致崩溃

2018-04-23 17:57:11.940632+0800 VPInterfaceControllerDemo[6606:302025] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[VPInterfaceController setVideoTitle:]: unrecognized selector sent to instance 0x60400029d920'
就是这里：
if(!_isLive) {
        ((void(*)(id,SEL,id))objc_msgSend)(_interfaceController, NSSelectorFromString(@"setVideoTitle:"), @"Test");
    }