WKWebViewは簡単に使えます.

WKWebViewの紹介:1、JavaScriptのNitroライブラリのロードを許可し、呼び出し(UICbViewで制限)2、より多くのH 5特性をサポートする3、UICWebViewとUID WebViewの重さを14種類と3つのプロトコルで構成しています.

  ：
WKWebViewConfiguration *config = [[WKWebViewConfiguration alloc] init];
//         ：preferences
config.preferences = [WKPreferences new];
//The minimum font size in points default is 0;
config.preferences.minimumFontSize = 10;
//    JavaScript
config.preferences.javaScriptEnabled = YES;
//       ，        
config.preferences.javaScriptCanOpenWindowsAutomatically = YES;
//  JS webView    
config.userContentController = [WKUserContentController new];

//     
[config.userContentController addScriptMessageHandler:self name:@"js   "];

//   WKWebView
     :
WkWebView * wkwebView = [[WKWebView alloc] initWithFrame:frame configuration:config];
self.wkwebView.navigationDelegate = self;
self.wkwebView.UIDelegate = self;
NSURLRequest * request = [NSURLRequest requestWithURL:[NSURL URLWithString:str]];
[self.wkwebView loadRequest:request];


WKNavigationDelegate
//      ，     。          ，web        
-(void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponse decisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler{
   
   decisionHandler(WKNavigationResponsePolicyAllow);
}

//       ，      
-(void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler{
   decisionHandler(WKNavigationActionPolicyAllow);  
}

//          
- (void)webView:(WKWebView *)webView didStartProvisionalNavigation:(WKNavigation *)navigation;
//           
- (void)webView:(WKWebView *)webView didCommitNavigation:(WKNavigation *)navigation;

OC  JS
//           
- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation;
        OC  JS   
//javaScriptString JS   ，completionHandler     block
[self.webView evaluateJavaScript:javaScriptString completionHandler:completionHandler];

//          
- (void)webView:(WKWebView *)webView didFailProvisionalNavigation:(WKNavigation *)navigation;


ScriptMessageHandler 
JS  OC
   JS       ,                WKWebView        ，          JS       

-(void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message{
NSLog(@"%@",message.name);
NSLog(@"%@",message.body);
}

        
       WKWebView   
window.webkit.messageHandlers..postMessage()


//       
@interface WeakScriptMessageDelegate : NSObject

@property (nonatomic, weak) id scriptDelegate;

- (instancetype)initWithDelegate:(id)scriptDelegate;

@end

@implementation WeakScriptMessageDelegate

- (instancetype)initWithDelegate:(id)scriptDelegate
{
   self = [super init];
   if (self) {
       _scriptDelegate = scriptDelegate;
   }
   return self;
}

- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message
{
   [self.scriptDelegate userContentController:userContentController didReceiveScriptMessage:message];
}

@end


WKUserContentController *userContentController = [[WKUserContentController alloc] init];    
[userContentController addScriptMessageHandler:[[WeakScriptMessageDelegate alloc] initWithDelegate:self] name:@"closeMe"];

   self dealloc   
[[_webView configuration].userContentController removeScriptMessageHandlerForName:@"closeMe"];