cordova 插件 （最簡單蠢箩，步驟最少的實現(xiàn)）

1链蕊、 JS調(diào)用AlfreldPlugin 為暴露出來的名稱，myMethod為方法名谬泌。

// index.js
Cordova.exec(successFunction, failFunction, "AlfreldPlugin", "myMethod", ["function"]);

2滔韵、 config.xml，配置AlfreldPlugin 到 TestPlugin的映射掌实，

<feature name="AlfreldPlugin">
      <param name="ios-package" value="TestPlugin" />
      <param name="onload" value="true" />
</feature>

3陪蜻、原生實現(xiàn)

//TestPlugin.h
@interface TestPlugin : CDVPlugin
  - (void)myMethod:(CDVInvokedUrlCommand*)command;
@end

  //TestPlugin.m
@implementation TestPlugin
-(void) pluginInitialize {
    return;
}
- (void)myMethod:(CDVInvokedUrlCommand*)command
{
    CDVPluginResult* pluginResult = nil;
    NSString* myarg = [command.arguments objectAtIndex:0];//獲取第一個參數(shù)
    if (myarg != nil) {
        pluginResult = [CDVPluginResult resultWithStatus:CDVCommandStatus_OK messageAsString:@"return Data  ：） "];
    } else {
        pluginResult = [CDVPluginResult resultWithStatus:CDVCommandStatus_ERROR messageAsString:@"Arg was null"];
    }
    [self.commandDelegate sendPluginResult:pluginResult callbackId:command.callbackId];
}
@end

cordova 插件 （標(biāo)準(zhǔn)實現(xiàn)）

1、barcodescanner.js 中實現(xiàn)調(diào)用贱鼻，注意BarcodeScanner為config.xml中的BarcodeScanner

cordova.define("phonegap-plugin-barcodescanner.BarcodeScanner", function(require, exports, module) {
        var exec = cordova.require("cordova/exec");
        var scanInProgress = false;
        function BarcodeScanner() {//......};
         //......
         BarcodeScanner.prototype.scan = function (successCallback, errorCallback, config) {
            exec(
                function(result) {
                    scanInProgress = false;
                    successCallback(result);
                },
                function(error) {
                    scanInProgress = false;
                    errorCallback(error);
                },
                'BarcodeScanner',
                'scan',
                config
            );
        };
         //......
        var barcodeScanner = new BarcodeScanner();
        module.exports = barcodeScanner;
});

2宴卖、cordova_plugin.js實現(xiàn)對插件的配置滋将，注意：該配置中id為1中define的內(nèi)容，pluginId為module.exports.metadata的內(nèi)容症昏，file指向barcodescaner.js,clobbers為調(diào)用插件時的引用随闽。

{
        "id": "phonegap-plugin-barcodescanner.BarcodeScanner",
        "file": "plugins/phonegap-plugin-barcodescanner/www/barcodescanner.js",
        "pluginId": "phonegap-plugin-barcodescanner",
        "clobbers": [
            "cordova.plugins.barcodeScanner"
        ]
    },
//...
module.exports.metadata = 
{
    "phonegap-plugin-barcodescanner": "6.0.6",
};

3、config.xml肝谭，CDVBarcodeScaner為實際的類名

    <feature name="BarcodeScanner">
        <param name="ios-package" value="CDVBarcodeScanner" />
    </feature>

4掘宪、原生實現(xiàn)
5、js調(diào)用分苇，注意cordova.plugins.barcodeScanner跟步驟2中的clobbers一致添诉。

cordova.plugins.barcodeScanner.scan(
      function (result) {
          alert("We got a barcode\n" +
                "Result: " + result.text + "\n" +
                "Format: " + result.format + "\n" +
                "Cancelled: " + result.cancelled);
      },
      function (error) {
          alert("Scanning failed: " + error);
      }
   );

插件開發(fā)時的注意事項

1、當(dāng)下面參數(shù)設(shè)置為 YES 可以設(shè)置多次跟js進行交互
- (void)setKeepCallbackAsBool:(BOOL)bKeepCallback;
2医寿、CDVPlugin中可以通過變量viewController獲取當(dāng)前頁面所在的viewController

[self.viewController presentViewController:_readerViewController animated:YES completion:nil];