IOS JS OC calls each other (JavaScriptCore) (ii)

Previous section address http://blog.csdn.net/lwjok2007/article/details/47058101

And then the last verse we talked about iOS call JS

Down we use JS call iOS

JS calls iOS in two different cases

One, JS inside the direct call method

Second, JS inside through the object call method

First, we look at the first, calling the method directly.

which uses the block of iOS.

On the Code

-(void) Webviewdidfinishload: (UIWebView *) webview{    //page load Complete Call this method        //ios call JS        //First create Jscontext Object (here through the current WebView key gets to Jscontext)    jscontext *context=[webview valueforkeypath:@ " DocumentView.webView.mainFrame.javaScriptContext "];      JS call iOS    //First case    //where Test1 is the method name of JS, assigned to is a block inside is iOS code    //This method will eventually print out all the received parameters, JS parameter is not fixed we'll know when we test.    context[@ "test1"] = ^ () {        Nsarray *args = [Jscontext currentarguments];        for (id obj in args) {            NSLog (@ "%@", obj);        }    };    Here we do not write backstage (but we already know that iOS can call JS, we simulate)    //First prepare the JS code, to invoke the JS function test1 and then execute    //a parameter    nsstring *[email Protected] "test1 (' parameter 1 ')";    [Context Evaluatescript:jsfunctstr];        Two parameters    nsstring *[email protected] "test1 (' parameter a ', ' parameter B ')";    [Context evaluatescript:jsfunctstr1];    }

If the block assigned to Test1 in the above code is executed then the result is right, JS calls the iOS

We look at the results.

We see the parameters are printed out, and a parameter and two parameters can be, also conform to the JS parameter number of unlimited

Down we see the second case is that the method is invoked by an object in JS.

It's a little bit more complicated here, we need to use

Jsexport

All things added Jsexport protocol protocol, the prescribed methods, variables, etc. will be open to JS, we can call through JS to

It's a bit around here. We look directly at the code

First create a class to inherit NSObject and specify a protocol

#import <Foundation/Foundation.h> #import <javascriptcore/javascriptcore.h>// First create a protocol that implements the Jsexport protocol @protocol testjsobjectprotocol <jsexport>//here we test several parameters-(void) testnoparameter;-( void) Testoneparameter: (NSString *) message;-(void) Testtowparameter: (NSString *) message1 secondparameter: (NSString * ) Message2; @end//Let us create a class that implements the above protocol @interface testjsobject:nsobject<testjsobjectprotocol> @end

Implementation of the class

#import "TestJSObject.h" @implementation testjsobject//The method is just a log and so will look at the log and parameters can be on the instructions JS called here the native method of iOS-(void) testnoparameter{    NSLog (@ "This is iOS testnoparameter"); -(void) Testoneparameter: (NSString *) message{    NSLog (@ "This is iOS testoneparameter=%@", message); -(void) Testtowparameter: (NSString *) message1 secondparameter: (NSString *) message2{   NSLog (@ "This is iOS testtowparameter=%@  second=%@ ", Message1,message2);} @end

Let's call the test after Weibview loading is complete.

The code is as follows:

-(void) Webviewdidfinishload: (UIWebView *) webview{    //page load Complete Call this method        //Create Jscontext First Object (here through the current WebView key gets to Jscontext)    jscontext *context=[webview valueforkeypath:@ " DocumentView.webView.mainFrame.javaScriptContext "];        In the second case, JS is called through the object, we assume that JS has an object Testobject in the calling method    //First create our new class object, assign him to the object JS        testjsobject *testjo=[ Testjsobject new];    context[@ "Testobject"]=TESTJO;        We also use the same way to simulate the JS call method    nsstring *[email protected] "testobject. Testnoparameter () ";    [Context Evaluatescript:jsstr1];    NSString *[email protected] "testobject. Testoneparameter (' parameter 1 ') ";    [Context EVALUATESCRIPT:JSSTR2];    NSString *[email protected] "testobject. Testtowparametersecondparameter (' parameter a ', ' parameter B ') ";    [Context EVALUATESCRIPT:JSSTR3];    }

Results such as

Okay, we saw the results. Three methods are called

OK, two ways are done.

Source code We upload to the group space [testjsoc.zip] need to download

Apple Development Group: 414319235 Welcome to join the Welcome discussion question

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.

IOS JS OC calls each other (JavaScriptCore) (ii)