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UIWebView Dynamic Content Size

I looked around and could not see quick ways to do this. I am trying to increase the dynamic height of my UIWebViews. I have a UIWebView that loads data using the loadHtmlString function. The fact is that I load data from the sqlite database, every time I load another row of different lengths, and of course the web view gets a different height. Now I need to know how to make the UIWebView exact height in order to load my next content right under the webView. This is what I still have

var jobSkillView = UIWebView(frame: CGRectMake(-5, 480.0, screenWidth, 300.0))
jobSkillView.loadHTMLString("<html><body p style='font-family:arial;font-size:16px;'>" + jobSkills + "</body></html>", baseURL: nil)
jobSkillView.stringByEvaluatingJavaScriptFromString("document.body.innerHTML")
jobSkillView.scrollView.scrollEnabled = true
jobSkillView.scrollView.bounces = true
jobSkillView.sizeToFit()
border.addSubview(jobSkillView)

I found something similar on SO, but not sure how to associate it with a frame UIWebView:

func webViewDidFinishLoad(jobSkillView : UIWebView){
    // Change the height dynamically of the UIWebView to match the html content
    var jobSkillViewFrame: CGRect = jobSkillView.frame
    jobSkillViewFrame.size.height = 1
    jobSkillView.frame = jobSkillViewFrame
    var fittingSize: CGSize = (jobSkillView.sizeThatFits(CGSizeZero))
    jobSkillViewFrame.size = fittingSize
    // webViewFrame.size.width = 276; Making sure that the webView doesn't get wider than 276 px
    jobSkillView.frame = jobSkillViewFrame
    var jobSkillViewHeight = jobSkillView.frame.size.height
}
+12
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9 answers

Swift 5 & WKWebView

, , OP!
:

// make sure to declare the delegate when creating your webView (add UIWebViewDelegate to class declaration as well)
myWebView.delegate = self

func webViewDidFinishLoad(webView: UIWebView) {
     webView.frame.size.height = 1
     webView.frame.size = webView.sizeThatFits(CGSize.zero)
}

WKWebView

1) WebKit
2) ViewController WKNavigationDelegate
3) WKWebView : webView.navigationDelegate = self
4) :

webView(_ webView: WKWebView, didFinish navigation: WKNavigation!)

UIWebView WKWebView , , .
webView.sizeThatFits(CGSize.zero) :

webView.frame.size = webView.scrollView.contentSize

WKWebView :

func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
    webView.frame.size.height = 1
    webView.frame.size = webView.scrollView.contentSize
}
+34

func webViewDidFinishLoad(_ webView: UIWebView) {
    webView.frame.size.height = 1
    webView.frame.size = webView.sizeThatFits(.zero)
    webView.scrollView.isScrollEnabled=false;
    myWebViewHeightConstraint.constant = webView.scrollView.contentSize.height
    webView.scalesPageToFit = true
}

, myWebViewHeightConstraint

+16

UIWebViews, , , UIWebView , . CSS...

class CustomUIWebView: UIWebView, UIWebViewDelegate {

    required init(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        self.scrollView.scrollEnabled = false
        self.scrollView.bounces = false
        self.delegate = self
    }

    override init(frame: CGRect) {
        super.init(frame: frame)
        self.scrollView.scrollEnabled = false
        self.scrollView.bounces = false
        self.delegate = self
    }

    override func loadHTMLString(string: String!, baseURL: NSURL!) {
        var cssURL:String = NSBundle.mainBundle().pathForResource("webview", ofType: "css")!
        var s:String = "<html><head><title></title><meta name=\"viewport\" content=\"initial-scale=1, user-scalable=no, width=device-width\" /><link rel=\"stylesheet\" href=\"./webview.css\" ></link></head><body>"+string+"</body></html>";
        var url:NSURL

        if baseURL == nil {
            url = NSBundle.mainBundle().bundleURL
        } else {
            url = baseURL
        }

        super.loadHTMLString(s, baseURL: url)
    }

    func webViewDidFinishLoad(webView: UIWebView) {
        self.webViewResizeToContent(webView)
    }

    func webViewResizeToContent(webView: UIWebView) {
        webView.layoutSubviews()

        // Set to smallest rect value
        var frame:CGRect = webView.frame
        frame.size.height = 1.0
        webView.frame = frame

        var height:CGFloat = webView.scrollView.contentSize.height
        println("UIWebView.height: \(height)")

        webView.setHeight(height: height)
        let heightConstraint = NSLayoutConstraint(item: webView, attribute: NSLayoutAttribute.Height, relatedBy: NSLayoutRelation.Equal, toItem: nil, attribute: NSLayoutAttribute.Height, multiplier: 1.0, constant: height)
        webView.addConstraint(heightConstraint)

        // Set layout flag
        webView.window?.setNeedsUpdateConstraints()
        webView.window?.setNeedsLayout()
    }

}
+6

:

let height = webView.scrollView.contentSize.height

- . , , , , :

let height = webView.stringByEvaluatingJavaScript(from: "document.body.scrollHeight")

:

    func webViewDidFinishLoad(_ webView: UIWebView) {

    //webview height
    webView.frame.size.height = 1
    webView.frame.size = webView.sizeThatFits(.zero)
    webView.scrollView.isScrollEnabled = false
    let height = webView.stringByEvaluatingJavaScript(from: "document.body.scrollHeight")
    if let height = height {
        if let heightInt = Int(height) {
            let heightFloat = Float(heightInt)

            webViewHeightConstraint.constant = CGFloat(heightFloat)
        }
    }
    webView.scalesPageToFit = true
}
+4

, , , , . , UIWebViewDelegate . var jobSkillView (jobSkillView.delegate = self). . if else, func webViewDidLoad. , UIWebView. **** , 1. UIWebView. UIWebView Swift.

+1

, UIWebView Swift 3.x

func webViewDidFinishLoad(_ webView: UIWebView) {        

 let height = webView.scrollView.contentSize.height
 var wRect = webView.frame
 wRect.size.height = height
 webView.frame = wRect

}
+1

-, 3 4

//
//  RSWebView.swift
//  CustumWebViewDemo
//
//  Created by Ruchin Somal on 01/01/18.
//  Copyright © 2018 Ruchin Somal. All rights reserved.
//

import UIKit

class RSWebView: UIWebView, UIWebViewDelegate {

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)!
        self.scrollView.isScrollEnabled = false
        self.scrollView.bounces = false
        self.delegate = self
    }

    override init(frame: CGRect) {
        super.init(frame: frame)
        self.scrollView.isScrollEnabled = false
        self.scrollView.bounces = false
        self.delegate = self
    }

    override func loadHTMLString(_ string: String?, baseURL: URL?) {
        let s:String = "<html><head><title></title><meta name=\"viewport\" content=\"initial-scale=1, user-scalable=no, width=device-width\" /><link rel=\"stylesheet\" href=\"./webview.css\" ></link></head><body>"+string!+"</body></html>";
        var url:URL

        if baseURL == nil {
            url = Bundle.main.bundleURL
        } else {
            url = baseURL!
        }

        super.loadHTMLString(s, baseURL: url)
    }

    func webViewDidFinishLoad(_ webView: UIWebView) {
        self.webViewResizeToContent(webView: webView)
    }

    func webViewResizeToContent(webView: UIWebView) {
        webView.layoutSubviews()

        // Set to initial value of webview
        var frame:CGRect = webView.frame
        frame.size.height = 1.0
        webView.frame = frame

        // Calculated height of webview
        let wvheight: CGFloat = webView.scrollView.contentSize.height
        print("UIWebView.height: \(wvheight)")
        var wvRect = webView.frame
        wvRect.size.height = wvheight
        webView.frame = wvRect

        let heightConstraint = NSLayoutConstraint(item: webView, attribute: NSLayoutAttribute.height, relatedBy: NSLayoutRelation.equal, toItem: nil, attribute: NSLayoutAttribute.height, multiplier: 1.0, constant: wvheight)
        webView.addConstraint(heightConstraint)

        webView.window?.setNeedsUpdateConstraints()
        webView.window?.setNeedsLayout()
    }

}
+1

Webview height 1, offsetHeight Webview

webView1.frame.size.height = 1
0

HTML Webview:

func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
    webView.evaluateJavaScript("document.documentElement.scrollHeight", completionHandler: { (height, error) in
        self.webviewHeightConstraint?.constant = height as! CGFloat
    })
}

:

import UIKit
import WebKit

class ViewController: UIViewController, WKNavigationDelegate {

@IBOutlet weak var webviewHeightConstraint: NSLayoutConstraint!
@IBOutlet weak var webview: WKWebView!
var observing = false

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view.
    webview.navigationDelegate = self
    webview.scrollView.isScrollEnabled = false

        self.webview.loadHTMLString("""
        <html>
        <head>
        <style>
        ul {
        list-style: none;
        }

        ul li::before {
        content: "\\2022";
        color: red;
        font-weight: bold;
        display: inline-block;
        width: 1em;
        margin-left: -1em;
        }
        </style>
        </head>
        <body>

        <h2>Change Bullet Color of List Items</h2>

        <ul>
        <li>Adele</li>
        <li>Agnes</li>
        <li>Billy</li>
        <li>Bob</li>
        <li>Bob</li>
        <li>Bob</li>
        <li>Bob</li>
        <li>Bob</li>
        <li>Bob</li>
        <li>Bob</li>
        <li>Bob</li>
        <li>Bob</li>
        <li>Bob</li>
        <li>Bob</li>
        </ul>

        </body>
        </html>
""", baseURL: nil)
}

func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
    webView.evaluateJavaScript("document.documentElement.scrollHeight", completionHandler: { (height, error) in
        self.webviewHeightConstraint?.constant = height as! CGFloat
    })
}

}
0

Source: https://habr.com/ru/post/1570520/

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