the first time h5 interacts with APP, there are some problems.

there is a requirement:
the front end of H5 needs to call the camera and photo album to upload a picture. Then the developers on the native APP side said to me that you can just call my method for opening photo albums.

here are the methods provided by native APP:
Open album:

showAppByOneParam("SHOW_ALBUM");

turn on the camera:

showAppByOneParam("TAKE_PHOTO");

Common callback function:

getUploadUrl(url) //url

my code:

//
onSelect:function(item){
    this.showImages = false;
    if(item.name == ""){
        showAppByOneParam("SHOW_ALBUM");
    }
    else{
        showAppByOneParam("TAKE_PHOTO");
    }
},
//
callbackImages:function(url){
    if(url){
        Toast(url);
    }
    else{
        Toast("");
    }
}
-------------------------------------
mounted:function(){
    //APP
    window.getUploadUrl = this.callbackImages;
}

finally, after the release of H5 and native packaging, there was no response at all when I clicked the button. What went wrong? ~