iOS8以后，苹果推出了新框架Webkit，提供了替换UIWebView的组件WKWebView。

WKWebView的特性：

• 性能高，稳定性好，占用的内存比较小
• 支持JS交互
• 支持HTML5 新特性
• 可以添加进度条（这个我选择的还是第三方,最后介绍)
• 支持内建手势，
• 高达60fps的滚动刷新率以及内置手势
  一.创建
  1.导入Wbkit这个类库
  2.创建个WebView的对象(基本与uiwebview一致)

    WKWebView *webView = [[WKWebView alloc] initWithFrame:self.view.bounds];
    [webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"https://www.baidu.com"]]];
    [self.view addSubview:webView];

3.代理方法:

webView.UIDelegate = self;
webView.navigationDelegate = self;

pragma mark - WKNavigationDelegate

1. WKNavigationDelegate来追踪加载过程
// 页面开始加载时调用
- (void)webView:(WKWebView *)webView didStartProvisionalNavigation:(WKNavigation *)navigation;
// 当内容开始返回时调用
- (void)webView:(WKWebView *)webView didCommitNavigation:(WKNavigation *)navigation;
// 页面加载完成之后调用
- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation;
// 页面加载失败时调用
- (void)webView:(WKWebView *)webView didFailProvisionalNavigation:(WKNavigation *)navigation;

2.WKNavigtionDelegate页面跳转相关
// 接收到服务器跳转请求之后再执行
- (void)webView:(WKWebView *)webView didReceiveServerRedirectForProvisionalNavigation:(WKNavigation *)navigation;
// 在收到响应后，决定是否跳转
- (void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponse decisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler{
           NSLog(@"%@",navigationResponse.response.URL.absoluteString);
    //允许跳转
          decisionHandler(WKNavigationResponsePolicyAllow);
    //不允许跳转
          //decisionHandler(WKNavigationResponsePolicyCancel);
}
// 在发送请求之前，决定是否跳转
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler;

pragma mark - WKUIDelegate

// 创建一个新的WebView
- (WKWebView *)webView:(WKWebView *)webView createWebViewWithConfiguration:(WKWebViewConfiguration *)configuration forNavigationAction:(WKNavigationAction *)navigationAction windowFeatures:(WKWindowFeatures *)windowFeatures{
    return [[WKWebView alloc]init];
}
// 输入框
- (void)webView:(WKWebView *)webView runJavaScriptTextInputPanelWithPrompt:(NSString *)prompt defaultText:(nullable NSString *)defaultText initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(NSString * __nullable result))completionHandler{
    completionHandler(@"http");
}
// 确认框
- (void)webView:(WKWebView *)webView runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(BOOL result))completionHandler{
    completionHandler(YES);
}
// 警告框
- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(void))completionHandler{
    NSLog(@"%@",message);
    completionHandler();
}

关于介绍一些交互用法可参考:http://www.cocoachina.com/ios/20161121/18142.html

第三方的进度条 我使用的是NJKWebViewProgress

(当然如果用进度条,我还是使用的是uivebview的控件)
连接:https://github.com/ninjinkun/NJKWebViewProgress

#import "detailTeachVC.h"
#import "NJKWebViewProgress.h"
#import "NJKWebViewProgressView.h"
@interface detailTeachVC ()<UIWebViewDelegate,NJKWebViewProgressDelegate>
{
    NJKWebViewProgressView *_progressView;
    NJKWebViewProgress *_progressProxy;
}
@property(nonatomic,strong)UIWebView *webview;
@end

@implementation detailTeachVC

- (void)viewDidLoad {
    [super viewDidLoad];
    
    // Do any additional setup after loading the view.
    
    self.view.backgroundColor=[UIColor whiteColor];
    _webview=[[UIWebView alloc] initWithFrame:self.view.frame];
    [self.view addSubview:_webview];
    
    _progressProxy = [[NJKWebViewProgress alloc] init];
    _progressProxy.webViewProxyDelegate = self;
    _progressProxy.progressDelegate = self;

    _webview.delegate=_progressProxy;//#这个代理设置的不是self#

    CGFloat progressBarHeight = 2.f;
    CGRect navigationBarBounds = self.navigationController.navigationBar.bounds;
    CGRect barFrame = CGRectMake(0, navigationBarBounds.size.height - progressBarHeight, navigationBarBounds.size.width, progressBarHeight);
    _progressView = [[NJKWebViewProgressView alloc] initWithFrame:barFrame];
    _progressView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleTopMargin;

    
    [self initData];
}
-(void)initData{
    
    NSString *url=[NSString stringWithFormat:@"https://www.baidu.com/"];
    [_webview loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:url]]];
    
}
- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    [self.navigationController.navigationBar addSubview:_progressView];
}

-(void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
    
    // Remove progress view
    // because UINavigationBar is shared with other ViewControllers
    [_progressView removeFromSuperview];
}
#pragma mark - NJKWebViewProgressDelegate
-(void)webViewProgress:(NJKWebViewProgress *)webViewProgress updateProgress:(float)progress
{
    [_progressView setProgress:progress animated:YES];
    self.title = [_webview stringByEvaluatingJavaScriptFromString:@"document.title"];
}
#pragma mark - UIWebViewDelegate
- (void)webViewDidStartLoad:(UIWebView *)webView
{

}
- (void)webViewDidFinishLoad:(UIWebView *)webView
{

}