先上代码： xcode 9.4 ios 11.4
import UIKit
import WebKit class RootViewController: UIViewController, WKNavigationDelegate {
var webView: WKWebView! override func viewDidLoad() {
super.viewDidLoad()
// 创建视图
let screen = UIScreen.main.bounds
// 按钮栏
let buttonBarWidth:CGFloat =
let buttonBar = UIView(frame: CGRect(x: (screen.size.width - buttonBarWidth)/, y: , width:buttonBarWidth, height: ))
self.view.addSubview(buttonBar) let width = buttonBar.frame.size.width / -
//添加按钮
let buttonHTML = UIButton(type: UIButtonType.system)
buttonHTML.setTitle("通过路径加载", for: UIControlState())
buttonHTML.frame = CGRect(x:, y:, width: width, height: )
//添加事件
buttonHTML.addTarget(self, action: #selector(buttonHTML(_:)), for: .touchUpInside)
buttonBar.addSubview(buttonHTML) //添加 loadHTMLString 按钮
let loadHTMLString = UIButton(type: UIButtonType.system)
loadHTMLString.setTitle("loadHTMLString", for: UIControlState())
loadHTMLString.frame = CGRect(x: width + , y:, width: width, height: )
//添加事件
loadHTMLString.addTarget(self, action: #selector(loadHTMLString(_:)), for: .touchUpInside)
buttonBar.addSubview(loadHTMLString) //添加loadData按钮
let loadData = UIButton(type: UIButtonType.system)
loadData.setTitle("loadData", for: UIControlState())
loadData.frame = CGRect(x:, y: , width: width, height: )
//添加事件
loadData.addTarget(self, action: #selector(loadData(_:)), for: .touchUpInside)
buttonBar.addSubview(loadData) //添加loadRequest按钮--- 加载网络地址
let loadRequest = UIButton(type: UIButtonType.system)
loadRequest.setTitle("loadRequest", for: UIControlState())
loadRequest.frame = CGRect(x: width + , y: , width: width, height: )
//添加事件
loadRequest.addTarget(self, action: #selector(loadRequest(_:)), for: .touchUpInside)
buttonBar.addSubview(loadRequest) //添加WKWebView
self.webView = WKWebView(frame: CGRect(x:, y: , width: screen.size.width, height: screen.size.height - ))
self.view.addSubview(webView)
}
// 加载本地html 点击事件
@objc func buttonHTML(_ sender: AnyObject){
// 方法一 加载路径
let htmlPath = Bundle.main.path(forResource: "index", ofType: "html")
if let htmlPath = htmlPath {
let url = URL.init(fileURLWithPath: htmlPath) // 把字符串 转成 URL 类型
let request = URLRequest(url: url)
self.webView.load(request)
self.webView.navigationDelegate = self
}
// 方法二 加载路径
// let htmlPath = Bundle.main.url(forResource: "index", withExtension: "html")
// if let htmlPath = htmlPath{
// let request = URLRequest(url: htmlPath)
// self.webView.load(request)
// self.webView.navigationDelegate = self
// }
}
// loadHTMLString
@objc func loadHTMLString(_ sender: AnyObject){
// 方法一 直接加载 html 字符串
// let bundleUrl = NSURL.fileURL(withPath: Bundle.main.bundlePath)
// self.webView.loadHTMLString("<html><head><meta charset='utf-8'/><title>测试</title></head><body><h1>测试标题</h1></body></html>", baseURL: bundleUrl) // 方法二 把本地文件转成字符串，进行加载
let htmlPath = Bundle.main.path(forResource: "index2", ofType: "html")
let bundleUrl = NSURL.fileURL(withPath: Bundle.main.bundlePath)
do{
let html = try NSString(contentsOfFile: htmlPath!, encoding: String.Encoding.utf8.rawValue)
self.webView.loadHTMLString(html as String, baseURL: bundleUrl)
}catch let err as NSError{
err.description
}
}
// loadData 方式加载 -- > loadData 已经转换成--> load
@objc func loadData(_ sender: AnyObject){
let htmlPath = Bundle.main.path(forResource: "index3", ofType: "html")
let bundleUrl = NSURL.fileURL(withPath: Bundle.main.bundlePath) let htmlData = NSData(contentsOfFile: htmlPath!)
// NSData 要先转换成 Data 类型
self.webView.load(htmlData! as Data, mimeType: "text/html", characterEncodingName: "utf-8", baseURL: bundleUrl) }
// loadRequest 加载网络路径 ---> loadRequest 已经改为 load , NSURL --> URL,NSURLRequest --> URLRequest
@objc func loadRequest(_ sender: AnyObject){
let url = URL(string: "https://baidu.com")
let request = URLRequest(url: url!)
self.webView.load(request)
self.webView.navigationDelegate = self
}
// 委托协议的监听方法
func webView(_ webView: WKWebView, didStartProvisionalNavigation navigation: WKNavigation!) {
print("开始加载")
}
func webView(_ webView: WKWebView, didCommit navigation: WKNavigation!) {
print("内容开始返回")
}
func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
print("加载完成")
}
func webView(_ webView: WKWebView, didFailProvisionalNavigation navigation: WKNavigation!, withError error: Error) {
print("加载失败 error:" + error.localizedDescription)
}
}
上面 有四种方式 加载html 网页，
加载本地 html 的方法 有：
- buttonHTML
- loadHTMLString
- loadData
加载网络路径
loadRequest 案例中每一种方法都可以加载成功，加载方式大同小异加载本地文件，会自动去找到文件，如上图 2 个静态文件夹，里面没找到就会寻找外面的静态文件夹。 加载网络资源会报错处理一下就好：https://www.cnblogs.com/bruce-gou/p/10517044.html
以上的方式 文件夹是通过 NEW Group 的方式创建的。
如果是 通过菜单 Add Files to 这种方式创建的 则不可以。这种方式创建的文件夹是蓝色的如图
通过以上方式创建的文件，通过 Bundle.main.path(forResource: "index", ofType: "html") 取不到路径
@objc func test(_ sender: AnyObject){
let bundlePath = Bundle.main.bundlePath
let path = "file://\(bundlePath)/assets/index.html"
let url = URL(string: path);
let request = URLRequest(url: url!)
self.webView.load(request)
}
这样就可以取到路径值，就可以正常加载