Cordova 插件从本机函数获取异步响应

Posted 2023-02-25

【中文标题】Cordova 插件从本机函数获取异步响应

【英文标题】：Cordova plugin get the async response from native function

【发布时间】：2020-11-08 01:48:23

【问题描述】：

就我而言，我想构建一个简单的插件：

启动原生页面 （用户输入后）回调到cordova(js)

我没有找到处理回调的方法。 我搜索了科尔多瓦文档（Echo 示例），第一部分非常简单。但是，它没有提到异步回调。

【参考方案1】：

您可以通过同步发送“无结果”响应并保留 Cordova 回调来发送异步响应，以便与它一起发送异步结果。 例如：

安卓：

public class MyPlugin extends CordovaPlugin 
    
    private static CallbackContext myAsyncCallbackContext = null;

    @Override
    public boolean execute(String action, JSONArray args, CallbackContext callbackContext) throws JSONException 
        if (action.equals("myAsyncFunction")) 
            // save the callback context
            someCallbackContext = myAsyncCallbackContext; 
            
            // Send no result for synchronous callback
            PluginResult pluginresult = new PluginResult(PluginResult.Status.NO_RESULT);
            pluginresult.setKeepCallback(true);
            callbackContext.sendPluginResult(pluginresult);
        
        return true;
    


    // Some async callback
    public void onSomeAsyncResult(String someResult) 
        if(myAsyncCallbackContext != null)
            // Send async result
            myAsyncCallbackContext.success(someResult);
            myAsyncCallbackContext = null;
        
    

ios：

@interface MyPlugin : CDVPlugin
- (void)myAsyncFunction:(CDVInvokedUrlCommand *)command;
@end


@implementation MyPlugin

static NSString* myAsyncCallbackId = nil;

- (void)myAsyncFunction:(CDVInvokedUrlCommand *)command 
    // save the id
    myAsyncCallbackId = command.callbackId;

    // Send no result for synchronous callback
    CDVPluginResult* pluginResult = [CDVPluginResult resultWithStatus:CDVCommandStatus_NO_RESULT];
    [pluginResult setKeepCallbackAsBool:YES];
    [self.commandDelegate sendPluginResult:pluginResult callbackId:command.callbackId];


// Some async callback
- (void) didReceiveSomeAsyncResult:(NSString *)someResult 
    if(myAsyncCallbackId != nil)
        // Send async result
        CDVPluginResult* pluginResult = [CDVPluginResult resultWithStatus:CDVCommandStatus_OK messageAsString:someResult];
        [self.commandDelegate sendPluginResult:pluginResult callbackId:myAsyncCallbackId];
        myAsyncCallbackId = nil;
    


@end