使用 swift 将本地 html 加载到 UIWebView

Question

This one is driving me crazy early this morning. I want to load some local html into a web view:

class PrivacyController: UIViewController {

    @IBOutlet weak var webView:UIWebView!

    override func viewDidLoad() {
        let url = NSURL(fileURLWithPath: "privacy.html")
        let request = NSURLRequest(URL: url!)
        webView.loadRequest(request)
    }
}

The html file is located in the root folder of my project but is inside a group. The webview is blank for me. Any ideas whats wrong? I am on xcode 6.1 and running this example on my iphone 6.

Answer 1

To retrieve URLs for application resources, you should use URLForResource method of NSBundle class.

Swift 2

let url = NSBundle.mainBundle().URLForResource("privacy", withExtension:"html") 

Swift 3

let url = Bundle.main.url(forResource: "privacy", withExtension: "html")

Answer 2

Swift 3: type safe

@IBOutlet weak var webView: UIWebView!

override func viewDidLoad() {
    super.viewDidLoad()

    // Adding webView content
    do {
        guard let filePath = Bundle.main.path(forResource: "myFile", ofType: "html")
            else {
                // File Error
                print ("File reading error")
                return
        }

        let contents =  try String(contentsOfFile: filePath, encoding: .utf8)
        let baseUrl = URL(fileURLWithPath: filePath)
        webView.loadHTMLString(contents as String, baseURL: baseUrl)
    }
    catch {
        print ("File HTML error")
    }
}

Keep in mind: NS = Not Swift :]

Answer 3

// Point UIWebView
@IBOutlet weak var webView: UIWebView!

override func viewDidLoad() {
    super.viewDidLoad()

    //load a file
    var testHTML = NSBundle.mainBundle().pathForResource("privacy", ofType: "html")
    var contents = NSString(contentsOfFile: testHTML!, encoding: NSUTF8StringEncoding, error: nil)
    var baseUrl = NSURL(fileURLWithPath: testHTML!) //for load css file

    webView.loadHTMLString(contents, baseURL: baseUrl)

}

Answer 4

Swift 3 with 3 lines :)

if let url = Bundle.main.url(forResource: "privacy", withExtension: "html") {
    webview.loadRequest(URLRequest(url: url))
}

Answer 5

Swift version 2.1

this case also include Encoding

// load HTML String with Encoding
let path = NSBundle.mainBundle().pathForResource("policy", ofType: "html")
do {
    let fileHtml = try NSString(contentsOfFile: path!, encoding: NSUTF8StringEncoding)
    webView.loadHTMLString(fileHtml as String, baseURL: nil)
}
catch {

}

Answer 6

Add the local HTML file into your project and name that file as home.html, then create the NSURLRequest using NSURL object. After that passing the request to web view it will load the requested URL into web view and if you are not using storyboard add the uiwebview into view controller view like the below code.

 override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        let localfilePath = NSBundle.mainBundle().URLForResource("home", withExtension: "html");
        let myRequest = NSURLRequest(URL: localfilePath!);
        myWebView.loadRequest(myRequest);
        self.view.addSubview(myWebView)
    }

For more reference please refer this https://sourcefreeze.com/uiwebview-example-using-swift-in-ios/

Answer 7

This is worked for me:

@IBOutlet weak var mWebView: UIWebView!

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.

    mWebView.loadRequest(NSURLRequest(URL: NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource("fineName", ofType: "html")!)))

}

Added App Transport Security Settings with Dictionary type in info.plist file. Also added sub key Allow Arbitrary Loads for App Transport Security Settings with type Boolean and value YES .

Here is tutorial.

EDITED

For Swift 3 (Xcode 8)

mWebView.loadRequest(URLRequest(url: URL(fileURLWithPath: Bundle.main.path(forResource: "test/index", ofType: "html")!)))

Answer 8

Here is succinct version for Swift 4

1) Add import import WebKit

2) Add WebKit.framework in your project

@IBOutlet weak var webView: WKWebView!

if let filePath = Bundle.main.url(forResource: "FILE_NAME", withExtension: "html") {
  let request = NSURLRequest(url: filePath)
  webView.load(request as URLRequest)
}

Answer 9

You can load html string or local html file in UIWebView.

HTML string:

func loadHtmlCode() {
    let htmlCode = "<html><head><title>Wonderful web</title></head> <body><p>wonderful web. loading html code in <strong>UIWebView</strong></></body>"
    webView.loadHTMLString(htmlCode, baseURL: nil)
}

HTML file:

func loadHtmlFile() {
    let url = NSBundle.mainBundle().URLForResource("contactus", withExtension:"html")
    let request = NSURLRequest(URL: url!)
    webView.loadRequest(request)
}

Details can be found here: http://webindream.com/load-html-uiwebview-using-swift/

Answer 10

For swift 3 Use this:

do
    {
        let testHTML = Bundle.main.path(forResource: "about", ofType: "html")
        let contents =  try NSString(contentsOfFile: testHTML!, encoding: String.Encoding.utf8.rawValue)
        let baseUrl = NSURL(fileURLWithPath: testHTML!) //for load css file

        mWebView.loadHTMLString(contents as String, baseURL: baseUrl as URL)
    }
    catch
    {

    }

Answer 11

Swift 4.2, Xcode 10.1, WKWebView load HTML from file. UIWebView is deprecated.

In apps that run in iOS 8 and later, use the WKWebView class instead of using UIWebView.

import WebKit

@IBOutlet weak var webView: WKWebView!

override func viewDidLoad() {
    super.viewDidLoad()

    let localFilePath = Bundle.main.url(forResource: "document_terms_of_use", withExtension: "html")
    let request = NSURLRequest(url: localFilePath!)
    webView.load(request as URLRequest)
}

Answer 12

swift 4.2 & 5:

let webView = WKWebView(frame: CGRect(x: 0, y: 0, width: 1024, height: 768))
let url = URL(string: PERS_Path)
webView?.navigationDelegate = self
webView?.uiDelegate = self
webView!.loadFileURL(url!, allowingReadAccessTo: url!)
self.view. addSubview(webView)

don't forget to add this WKNavigationDelegate, WKUIDelegate

Answer 13

This worked for me (Xcode 8, Swift 3)

@IBOutlet weak var webViewer: UIWebView!

override func viewDidLoad() {
    super.viewDidLoad()

    let localfilePath = Bundle.main.url(forResource: "homeInfo", withExtension: "html");
    let myRequest = NSURLRequest(url: localfilePath!);
    webViewer.loadRequest(myRequest as URLRequest);
    self.view.addSubview(webViewer)
}