Load local html into UIWebView using swift

问题:

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.

回答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")

回答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 :]

回答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)

}

回答4:

Add the local html file into your project name it as home.html, then create the NSURLRequest using NSURL object, then passing the request to webview it will load the requested URL into webview and if you are not using storyboard add the uiwebview into viewcontroller 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 http://sourcefreeze.com/uiwebview-example-using-swift-in-ios/

回答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 {

}

回答6:

Swift 3 with 3 lines :)

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

回答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")!)))

回答8:

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/

回答9:

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
    {

    }

回答10:

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)
}