在webview中加载本地javascript？

Question

我正在swift中使用自己的广告制作移动浏览器,我想运行脚本.我已经注入了javascript本地文件,但它在其他窗口中打开并覆盖webview内容.是否可以在webview页面中运行javascript代码？不在其他窗口,只在页面内容的页面中.希望你能得到它

Answer 1

使用WKWebViewJavaScript的方法调用:

步骤1.导入webkit的类

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

第2步.创建一个WKWebView实例(不幸的是,它只能以编程方式完成)

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

迅速 var wkWebView: WKWebView? = WKWebView()

第3步.然后在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];

迅速:

    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!)

步骤4在以下位置加载HTML字符串(或loadRequest)wkWebView:

OBJ-C:

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

迅速:

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

第5步.调用包含在javascript中的javascript中存在的方法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
                 }
             }];

迅速:

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

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

        println(obj)
        println(error)
    })]