Class (WebController)

Implements a WebController to control the behavior of the Web component. A WebController can control only one Web component, and the APIs in the WebController can be invoked only after it has been bound to the target Web component.

This API is deprecated since API version 9. You are advised to use WebviewController⁹⁺ instead.

NOTE

The initial APIs of this component are supported since API version 8. Updates will be marked with a superscript to indicate their earliest API version.

The initial APIs of this class are supported since API version 8.

The sample effect is subject to the actual device.

Creating an Object

let webController: WebController = new WebController()

constructor^(deprecated)

constructor()

Constructs a WebController object.

NOTE

This API is supported since API version 8 and deprecated since API version 9. You are advised to use constructor¹¹⁺ instead.

System capability: SystemCapability.Web.Webview.Core

getCookieManager^(deprecated)

getCookieManager(): WebCookie

Obtains the cookie management object of the Web component.

NOTE

This API is supported since API version 9 and deprecated since API version 9. You are advised to use getCookie instead.

System capability: SystemCapability.Web.Webview.Core

Return value

Type	Description
WebCookie	Cookie management object of the Web component. For details, see WebCookie.

Example

// xxx.ets
@Entry
@Component
struct WebComponent {
  controller: WebController = new WebController()

  build() {
    Column() {
      Button('getCookieManager')
        .onClick(() => {
          let cookieManager = this.controller.getCookieManager()
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

requestFocus^(deprecated)

requestFocus()

Requests focus for this web page.

NOTE

This API is supported since API version 8 and deprecated since API version 9. You are advised to use requestFocus⁹⁺ instead.

System capability: SystemCapability.Web.Webview.Core

Example

// xxx.ets
@Entry
@Component
struct WebComponent {
  controller: WebController = new WebController()

  build() {
    Column() {
      Button('requestFocus')
        .onClick(() => {
          this.controller.requestFocus()
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

accessBackward^(deprecated)

accessBackward(): boolean

Checks whether going to the previous page can be performed on the current page.

NOTE

This API is supported since API version 8 and deprecated since API version 9. You are advised to use accessBackward⁹⁺ instead.

System capability: SystemCapability.Web.Webview.Core

Return value

Type	Description
boolean	true is returned if going to the previous page can be performed on the current page; otherwise, false is returned.

Example

// xxx.ets
@Entry
@Component
struct WebComponent {
  controller: WebController = new WebController()

  build() {
    Column() {
      Button('accessBackward')
        .onClick(() => {
          let result = this.controller.accessBackward()
          console.info('result:' + result)
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

accessForward^(deprecated)

accessForward(): boolean

Checks whether going to the next page can be performed on the current page.

NOTE

This API is supported since API version 8 and deprecated since API version 9. You are advised to use accessForward⁹⁺ instead.

System capability: SystemCapability.Web.Webview.Core

Return value

Type	Description
boolean	If going to the next page can be performed on the current page, true is returned; otherwise, false is returned.

Example

// xxx.ets
@Entry
@Component
struct WebComponent {
  controller: WebController = new WebController()

  build() {
    Column() {
      Button('accessForward')
        .onClick(() => {
          let result = this.controller.accessForward()
          console.info('result:' + result)
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

accessStep^(deprecated)

accessStep(step: number): boolean

Performs a specific number of steps forward or backward from the current page.

NOTE

This API is supported since API version 8 and deprecated since API version 9. You are advised to use accessStep⁹⁺ instead.

System capability: SystemCapability.Web.Webview.Core

Parameters

Name	Type	Mandatory	Description
step	number	Yes	Number of the steps to take. A positive number means to go forward, and a negative number means to go backward.

Return value

Type	Description
boolean	Whether going forward or backward from the current page is successful.

Example

// xxx.ets
@Entry
@Component
struct WebComponent {
  controller: WebController = new WebController()
  @State steps: number = 2

  build() {
    Column() {
      Button('accessStep')
        .onClick(() => {
          let result = this.controller.accessStep(this.steps)
          console.info('result:' + result)
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

backward^(deprecated)

backward()

Goes to the previous page based on the history stack. This API is generally used together with accessBackward.

NOTE

This API is supported since API version 8 and deprecated since API version 9. You are advised to use backward⁹⁺ instead.

System capability: SystemCapability.Web.Webview.Core

Example

// xxx.ets
@Entry
@Component
struct WebComponent {
  controller: WebController = new WebController()

  build() {
    Column() {
      Button('backward')
        .onClick(() => {
          this.controller.backward()
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

forward^(deprecated)

forward()

Goes to the next page based on the history stack. This API is generally used together with accessForward.

NOTE

This API is supported since API version 8 and deprecated since API version 9. You are advised to use forward⁹⁺ instead.

System capability: SystemCapability.Web.Webview.Core

Example

// xxx.ets
@Entry
@Component
struct WebComponent {
  controller: WebController = new WebController()

  build() {
    Column() {
      Button('forward')
        .onClick(() => {
          this.controller.forward()
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

deleteJavaScriptRegister^(deprecated)

deleteJavaScriptRegister(name: string)

Deletes a specific application JavaScript object that is registered with the window through registerJavaScriptProxy. The deletion takes effect immediately, with no need for invoking the refresh API.

NOTE

This API is supported since API version 8 and deprecated since API version 9. You are advised to use deleteJavaScriptRegister⁹⁺ instead.

System capability: SystemCapability.Web.Webview.Core

Parameters

Name	Type	Mandatory	Description
name	string	Yes	Name of the registered JavaScript object, which can be used to invoke the corresponding object on the application side from the web side.

Example

// xxx.ets
@Entry
@Component
struct WebComponent {
  controller: WebController = new WebController()
  @State name: string = 'Object'

  build() {
    Column() {
      Button('deleteJavaScriptRegister')
        .onClick(() => {
          this.controller.deleteJavaScriptRegister(this.name)
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

getHitTest^(deprecated)

getHitTest(): HitTestType

Obtains the element type of the area being clicked.

NOTE

This API is supported since API version 8 and deprecated since API version 9. You are advised to use getHitTest⁹⁺ instead.

System capability: SystemCapability.Web.Webview.Core

Return value

Type	Description
HitTestType	Element type of the area being clicked.

Example

// xxx.ets
@Entry
@Component
struct WebComponent {
  controller: WebController = new WebController()

  build() {
    Column() {
      Button('getHitTest')
        .onClick(() => {
          let hitType = this.controller.getHitTest()
          console.info("hitType: " + hitType)
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

loadData^(deprecated)

loadData(options: { data: string, mimeType: string, encoding: string, baseUrl?: string, historyUrl?: string })

Loads data. If baseUrl is empty, the specified character string will be loaded using the data protocol.

If baseUrl is set to a data URL, the encoded string will be loaded by the Web component using the data protocol.

If baseUrl is set to an HTTP or HTTPS URL, the encoded string will be processed by the Web component as a non-encoded string in a manner similar to loadUrl.

NOTE

This API is supported since API version 8 and deprecated since API version 9. You are advised to use loadData⁹⁺ instead.

System capability: SystemCapability.Web.Webview.Core

Parameters

Name	Type	Mandatory	Description
data	string	Yes	Character string obtained after being Base64 or URL encoded.
mimeType	string	Yes	Media type (MIME).
encoding	string	Yes	Encoding type, which can be Base64 or URL.
baseUrl	string	No	URL (HTTP/HTTPS/data compliant), which is assigned by the Web component to window.origin.
historyUrl	string	No	Historical record URL. If this parameter is not empty, it can be managed in historical records to implement page going backward and forward. This parameter is invalid when baseUrl is left empty.

Example

// xxx.ets
@Entry
@Component
struct WebComponent {
  controller: WebController = new WebController()

  build() {
    Column() {
      Button('loadData')
        .onClick(() => {
          this.controller.loadData({
            data: "<html><body bgcolor=\"white\">Source:<pre>source</pre></body></html>",
            mimeType: "text/html",
            encoding: "UTF-8"
          })
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

loadUrl^(deprecated)

loadUrl(options: { url: string|Resource, headers?: Array<Header> })

Loads a URL using the specified HTTP header.

The object injected through loadUrl is valid only in the current document. It will be invalid on a new page navigated to through loadUrl.

The object injected through registerJavaScriptProxy is still valid on a new page redirected through loadUrl.

NOTE

This API is supported since API version 8 and deprecated since API version 9. You are advised to use loadUrl⁹⁺ instead.

System capability: SystemCapability.Web.Webview.Core

Parameters

Name	Type	Mandatory	Description
url	string \|Resource	Yes	URL to load.
headers	Array<Header>	No	Additional HTTP request header of the URL. The default value is [].

Example

// xxx.ets
@Entry
@Component
struct WebComponent {
  controller: WebController = new WebController()

  build() {
    Column() {
      Button('loadUrl')
        .onClick(() => {
          this.controller.loadUrl({ url: 'www.example.com' })
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

onActive^(deprecated)

onActive(): void

Called when the Web component enters the active state.

NOTE

This API is supported since API version 8 and deprecated since API version 9. You are advised to use onActive⁹⁺ instead.

System capability: SystemCapability.Web.Webview.Core

Example

// xxx.ets
@Entry
@Component
struct WebComponent {
  controller: WebController = new WebController()

  build() {
    Column() {
      Button('onActive')
        .onClick(() => {
          this.controller.onActive()
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

onInactive^(deprecated)

onInactive(): void

Called when the Web component enters the inactive state.

NOTE

This API is supported since API version 8 and deprecated since API version 9. You are advised to use onInactive⁹⁺ instead.

System capability: SystemCapability.Web.Webview.Core

Example

// xxx.ets
@Entry
@Component
struct WebComponent {
  controller: WebController = new WebController()

  build() {
    Column() {
      Button('onInactive')
        .onClick(() => {
          this.controller.onInactive()
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

zoom^(deprecated)

zoom(factor: number): void

Sets a zoom factor for the current web page.

NOTE

This API is supported since API version 8 and deprecated since API version 9. You are advised to use zoom⁹⁺ instead.

System capability: SystemCapability.Web.Webview.Core

Parameters

Name	Type	Mandatory	Description
factor	number	Yes	Zoom factor to set. A positive value indicates zoom-in, and a negative value indicates zoom-out.

Example

// xxx.ets
@Entry
@Component
struct WebComponent {
  controller: WebController = new WebController()
  @State factor: number = 1

  build() {
    Column() {
      Button('zoom')
        .onClick(() => {
          this.controller.zoom(this.factor)
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

refresh^(deprecated)

refresh()

Called when the Web component refreshes the web page.

NOTE

This API is supported since API version 8 and deprecated since API version 9. You are advised to use refresh⁹⁺ instead.

System capability: SystemCapability.Web.Webview.Core

Example

// xxx.ets
@Entry
@Component
struct WebComponent {
  controller: WebController = new WebController()

  build() {
    Column() {
      Button('refresh')
        .onClick(() => {
          this.controller.refresh()
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

registerJavaScriptProxy^(deprecated)

registerJavaScriptProxy(options: { object: object, name: string, methodList: Array<string> })

Registers a JavaScript object with the window. APIs of this object can then be invoked in the window. You must invoke the refresh API for the registration to take effect.

NOTE

This API is supported since API version 8 and deprecated since API version 9. You are advised to use registerJavaScriptProxy⁹⁺ instead.

System capability: SystemCapability.Web.Webview.Core

Parameters

Name	Type	Mandatory	Description
object	object	Yes	Application-side JavaScript object to be registered. Methods and attributes can be declared, but cannot be directly called on HTML5. The parameters and return value can only be of the string, number, or Boolean type.
name	string	Yes	Name of the object to be registered, which is the same as that invoked in the window. After registration, the window can use this name to access the JavaScript object at the application side.
methodList	Array<string>	Yes	Methods of the JavaScript object to be registered at the application side.

Example

// xxx.ets
class TestObj {
  constructor() {
  }

  test(): string {
    return "ArkUI Web Component"
  }

  toString(): void {
    console.info('Web Component toString')
  }
}

@Entry
@Component
struct Index {
  controller: WebController = new WebController()
  testObj = new TestObj();
  build() {
    Column() {
      Row() {
        Button('Register JavaScript To Window').onClick(() => {
          this.controller.registerJavaScriptProxy({
            object: this.testObj,
            name: "objName",
            methodList: ["test", "toString"],
          })
        })
      }
      Web({ src: $rawfile('index.html'), controller: this.controller })
        .javaScriptAccess(true)
    }
  }
}

HTML file to be loaded:

<!-- index.html -->
<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
    </head>
    <body>
        Hello world!
        <script type="text/javascript">
            function htmlTest() {
                str = objName.test("test function")
                console.info('objName.test result:'+ str)
            }
        </script>
    </body>
</html>

runJavaScript^(deprecated)

runJavaScript(options: { script: string, callback?: (result: string) => void })

Executes a JavaScript script. This API uses an asynchronous callback to return the script execution result. runJavaScript can be invoked only after loadUrl is executed. For example, it can be invoked in onPageEnd.

NOTE

This API is supported since API version 8 and deprecated since API version 9. You are advised to use runJavaScript⁹⁺ instead.

System capability: SystemCapability.Web.Webview.Core

Parameters

Name	Type	Mandatory	Description
script	string	Yes	JavaScript script.
callback	(result: string) => void	No	Callback used to return the result. Returns null if the JavaScript script fails to be executed or no value is returned.

Example

// xxx.ets
@Entry
@Component
struct WebComponent {
  controller: WebController = new WebController()
  @State webResult: string = ''
  build() {
    Column() {
      Text(this.webResult).fontSize(20)
      Web({ src: $rawfile('index.html'), controller: this.controller })
      .javaScriptAccess(true)
      .onPageEnd((event) => {
        this.controller.runJavaScript({
          script: 'test()',
          callback: (result: string)=> {
            this.webResult = result
            console.info(`The test() return value is: ${result}`)
          }})
        if (event) {
          console.info('url: ', event.url)
        }
      })
    }
  }
}

HTML file to be loaded:

<!-- index.html -->
<!DOCTYPE html>
<html>
  <head>
      <meta charset="utf-8">
  </head>
  <body>
      Hello world!
      <script type="text/javascript">
          function test() {
              console.info('Ark WebComponent')
              return "This value is from index.html"
          }
      </script>
  </body>
</html>

stop^(deprecated)

stop()

Stops page loading.

NOTE

This API is supported since API version 8 and deprecated since API version 9. You are advised to use stop⁹⁺ instead.

System capability: SystemCapability.Web.Webview.Core

Example

// xxx.ets
@Entry
@Component
struct WebComponent {
  controller: WebController = new WebController()

  build() {
    Column() {
      Button('stop')
        .onClick(() => {
          this.controller.stop()
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

clearHistory^(deprecated)

clearHistory(): void

Clears the browsing history.

NOTE

This API is supported since API version 8 and deprecated since API version 9. You are advised to use clearHistory⁹⁺ instead.

System capability: SystemCapability.Web.Webview.Core

Example

// xxx.ets
@Entry
@Component
struct WebComponent {
  controller: WebController = new WebController()

  build() {
    Column() {
      Button('clearHistory')
        .onClick(() => {
          this.controller.clearHistory()
        })
      Web({ src: 'www.example.com', controller: this.controller })
    }
  }
}

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Class (WebController)

Creating an Object

constructor^(deprecated)

getCookieManager^(deprecated)

requestFocus^(deprecated)

accessBackward^(deprecated)

accessForward^(deprecated)

accessStep^(deprecated)

backward^(deprecated)

forward^(deprecated)

deleteJavaScriptRegister^(deprecated)

getHitTest^(deprecated)

loadData^(deprecated)

loadUrl^(deprecated)

onActive^(deprecated)

onInactive^(deprecated)

zoom^(deprecated)

refresh^(deprecated)

registerJavaScriptProxy^(deprecated)

runJavaScript^(deprecated)

stop^(deprecated)

clearHistory^(deprecated)

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最热博客

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Class (WebController)

Creating an Object

constructor(deprecated)

getCookieManager(deprecated)

requestFocus(deprecated)

accessBackward(deprecated)

accessForward(deprecated)

accessStep(deprecated)

backward(deprecated)

forward(deprecated)

deleteJavaScriptRegister(deprecated)

getHitTest(deprecated)

loadData(deprecated)

loadUrl(deprecated)

onActive(deprecated)

onInactive(deprecated)

zoom(deprecated)

refresh(deprecated)

registerJavaScriptProxy(deprecated)

runJavaScript(deprecated)

stop(deprecated)

clearHistory(deprecated)

你可能感兴趣的鸿蒙文章

标签云

最热博客

最新博客

constructor^(deprecated)

getCookieManager^(deprecated)

requestFocus^(deprecated)

accessBackward^(deprecated)

accessForward^(deprecated)

accessStep^(deprecated)

backward^(deprecated)

forward^(deprecated)

deleteJavaScriptRegister^(deprecated)

getHitTest^(deprecated)

loadData^(deprecated)

loadUrl^(deprecated)

onActive^(deprecated)

onInactive^(deprecated)

zoom^(deprecated)

refresh^(deprecated)

registerJavaScriptProxy^(deprecated)

runJavaScript^(deprecated)

stop^(deprecated)

clearHistory^(deprecated)