Load Local Javascript In Webview?

I'm making mobile browser with my own ads in swift and i want to run script.I already inject javascript local file but it opens in other window and override webview content.Is it p

Solution 1:

Using WKWebView for javascript method call:

Step 1. Import class for webkit

Obj-C: #import <WebKit/WebKit.h> Swift: import WebKit

Step 2. Create a WKWebView instance (Unfortunately it can only be done programatically)

Obj-C @property (strong, nonatomic) WKWebView *wkWebView;

Swift var wkWebView: WKWebView? = WKWebView()

Step 3. Then in viewDidLoad

Obj-C:

WKWebViewConfiguration*configuration = [[WKWebViewConfiguration alloc] init];

    NSString*scriptSourceCode = @"your javascript code here";
    WKUserScript*script = [[WKUserScript alloc] initWithSource:source injectionTime:WKUserScriptInjectionTimeAtDocumentStart forMainFrameOnly:YES];

    WKUserContentController*controller = [[WKUserContentController alloc] init];
    [controller addUserScript:script];

    configuration.userContentController = controller;

    _wkWebView = [[WKWebView alloc] initWithFrame:self.view.frame configuration:configuration];

    [self.view addSubview:_wkWebView];

Swift:

let configuration =WKWebViewConfiguration()
    let controller =WKUserContentController()

    let scriptSourceCode ="your javascript code here"let script =WKUserScript(source: scriptSourceCode, injectionTime: WKUserScriptInjectionTime.AtDocumentStart, forMainFrameOnly: true)
    controller.addUserScript(script)

    configuration.userContentController = controller

    self.wkWebView =WKWebView(frame: self.view.frame, configuration: configuration)

    self.view.addSubview(self.wkWebView!)

Step 4 Load a HTML string (or a loadRequest) in the wkWebView:

Obj-C:

[_wkWebView loadHTMLString:_desiredHTML baseURL:[[NSBundle mainBundle] bundleURL]];

Swift:

self.wkWebView?.loadHTMLString(_desiredHTML, baseURL: NSBundle.mainBundle().bundleURL)

Step 5. Call a method which exists in the javascript included in the WKWebView

Obj-C:

NSString *callMethod = [NSString stringWithFormat:@"existingMethodWithParam(%@)", stringParam];

    [_wkWebView evaluateJavaScript:callMethod
             completionHandler:^(id obj, NSError *error) {

                 if (error)
                 {
                     NSLog(@"ERROR evaluating JavaScript - %@", error);
                 }
                 else 
                 {
                     NSLog(@"Returned value - %@", obj); //if the javascript method has a return type
                 }
             }];

Swift:

    let callMethod = String(format: "existingMethodWithParam(%@)", stringParam)

    [self.wkWebView?.evaluateJavaScript(callMethod, completionHandler: { (obj, error) -> Void in

        println(obj)
        println(error)
    })]