在Swift中以编程方式创建webView

Question

I want to create something like an image gallery in my ViewController. For this, I'd need multiple webViews, depending on the number of images that I get from a JSON request. How can I insert new webViews if I need to?

As you can see in the above image, I have a scrollView and one UIWebView inside of the ViewController. How would I create a new webView inside of the first(second, third, etc.) if necessary? Is it possible?

Answer 1

you can create the web view programatically as simple as possible use this piece of code

override func viewDidLoad() {
    super.viewDidLoad()
    let webV:UIWebView = UIWebView(frame: CGRectMake(0, 0, UIScreen.mainScreen().bounds.width, UIScreen.mainScreen().bounds.height))
    webV.loadRequest(NSURLRequest(URL: NSURL(string: "http://www.google.co.in")))
    webV.delegate = self;
    self.view.addSubview(webV)
}

and if you want use this delegate function

func webView(webView: UIWebView!, didFailLoadWithError error: NSError!) {
    print("Webview fail with error \(error)");
}
func webView(webView: UIWebView!, shouldStartLoadWithRequest request: NSURLRequest!, navigationType: UIWebViewNavigationType) -> Bool {
    return true;
}
func webViewDidStartLoad(webView: UIWebView!) {
    print("Webview started Loading")
}
func webViewDidFinishLoad(webView: UIWebView!) {
    print("Webview did finish load")
}

Answer 2

For Swift 3:

override func viewDidLoad() {
    super.viewDidLoad()
    let webV    = UIWebView()
    webV.frame  = CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: UIScreen.main.bounds.height)
    webV.loadRequest(NSURLRequest(url: NSURL(string: "https://www.apple.com")! as URL) as URLRequest)
    webV.delegate = self
    self.view.addSubview(webV)
}

Reference: Based on the answer provided by @Deepakraj Murugesan

Answer 3

Although UIWebView is probably not the thing you should use for displaying images, you can create one with just a few lines of code:

let webView = UIWebView(frame: someFrame)
webView.loadRequest(NSURLRequest(URL: someURL!))
view.addSubview(webView)

Answer 4

你不能这样做，原来，webview会占用大量内存，如果你使用了一些数量，可能会导致糟糕的体验，为什么不使用ImageView？

Answer 5

I think SDWebImage + UIImageView will help you. See: https://github.com/rs/SDWebImage

Answer 6

For Swift 4:

webView = WKWebView()
webView.navigationDelegate = self
view = webView

let url = URL(string: "https://www.earthhero.org")!
webView.load(URLRequest(url: url))
webView.allowsBackForwardNavigationGestures = true

Plus you need to import WebKit and add WKNavigationDelegate to the Class.