【报bug】掉坑里了，按照官方的方档编写自定义component组件，uniapp页面没有效果

掉坑里了，按照官方的方档编写自定义component组件，uniapp页面没有效果
在页面上调用：
methods:{
play:function(){
var b = weex.isRegisteredComponent("mycomponent");
uni.showModal({
content:'开始播放:'+b,
showCancel:false
});
const self = this;
self.$refs.mycompt.play({'text':'123'},result=>{
uni.showModal({
content:'调用成功',
showCancel:false
});
console.log('success');
self.rv = result
});
}
}
弹了提示b=true,但是页面没有显示textView效果，异步play方法，也提示错误：
thirdScriptError
16:35:45.920 undefined is not an object (evaluating 'self.$refs.mycompt.play'); [Component] Event Handler Error @ components/tipsoft-video/video#handleEvent
16:35:45.940 play
16:35:45.960 play@[native code]
16:35:46.001 forEach@[native code]
16:35:46.041 forEach@[native code]
16:35:46.061 handleEvent
16:35:46.081 safeCallback@weex createInstanceContext:4:425719
16:35:46.102 weex createInstanceContext:4:566466
16:35:46.122 __hookEvent@weex createInstanceContext:4:773
16:35:46.142 weex createInstanceContext:4:566435
16:35:46.162 weex createInstanceContext:4:569696
16:35:46.182 weex createInstanceContext:4:568970
16:35:46.202 n@weex createInstanceContext:4:171534
16:35:46.222 subscribeHandler@weex createInstanceContext:4:2190
16:35:46.249 weex createInstanceContext:3:88755
16:35:46.269 weex createInstanceContext:3:88776
16:35:46.289 N@weex createInstanceContext:3:8336
16:35:46.309 Se@weex createInstanceContext:3:23015
16:35:46.335 consume@(weex framework):1:1263
16:35:46.355 map@[native code]