WkWebviewのいくつかの使用

プロジェクトにH 5をロードするには、UIWebViewではなくWkWebviewを使用しました.前者は後者より多くのメリットがあるからです.

より多くのHTML 5をサポートする機能

公式に発表された60 fpsまでのスクロールリフレッシュ率と内蔵ジェスチャー

はUIWebViewDelegateとUIWebViewを14種類と3つのプロトコルに分割し、以前は多くの不便な機能が実現されていた.https://developer.apple.com/library/mac/documentation/Cocoa/Reference/WebKit/ObjC_classic/index.html

Safari同じJavaScriptエンジン

は、より少ないメモリを消費しています.また、WkWebviewはiOS 8以上のシステムをサポートしています.

基本的な使い方
WKWebViewにはdelegate,WKUIdelegate,WKNavigationDelegteの2つがあります.WKNavigationDelegateは主にいくつかのジャンプ、ロード処理操作を処理し、WKUIdelegateは主にJSスクリプト、確認ボックス、警告ボックスなどを処理する.そのため、WKNavigationDelegateはもっとよく使われています.

#pragma mark - WKNavigationDelegate
//          
- (void)webView:(WKWebView *)webView didStartProvisionalNavigation:(WKNavigation *)navigation{
 
}
//           
- (void)webView:(WKWebView *)webView didCommitNavigation:(WKNavigation *)navigation{
 
}
//           
- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation{
 
}
//          
- (void)webView:(WKWebView *)webView didFailProvisionalNavigation:(WKNavigation *)navigation{
 
}
//               
- (void)webView:(WKWebView *)webView didReceiveServerRedirectForProvisionalNavigation:(WKNavigation *)navigation{
 
}
//       ，      
- (void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponse decisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler{
 
    NSLog(@"%@",navigationResponse.response.URL.absoluteString);
    //    
    decisionHandler(WKNavigationResponsePolicyAllow);
    //     
    //decisionHandler(WKNavigationResponsePolicyCancel);
}
//        ，      
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler{
 
     NSLog(@"%@",navigationAction.request.URL.absoluteString);
    //    
    decisionHandler(WKNavigationActionPolicyAllow);
    //     
    //decisionHandler(WKNavigationActionPolicyCancel);
}
#pragma mark - WKUIDelegate
//       WebView
- (WKWebView *)webView:(WKWebView *)webView createWebViewWithConfiguration:(WKWebViewConfiguration *)configuration forNavigationAction:(WKNavigationAction *)navigationAction windowFeatures:(WKWindowFeatures *)windowFeatures{
    return [[WKWebView alloc]init];
}
//    
- (void)webView:(WKWebView *)webView runJavaScriptTextInputPanelWithPrompt:(NSString *)prompt defaultText:(nullable NSString *)defaultText initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(NSString * __nullable result))completionHandler{
    completionHandler(@"http");
}
//    
- (void)webView:(WKWebView *)webView runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(BOOL result))completionHandler{
    completionHandler(YES);
}
//    
- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(void))completionHandler{
    NSLog(@"%@",message);
    completionHandler();
}

OCとJSのインタラクション
WKWebviewは、JavaScriptCoreまたはwebJavaScriptBridgeを使用することなく、jsインタラクションを実現するAPIを提供します.WKUSerContentControlを使用してjs nativeインタラクションを実現します.簡単に言えば、約束した方法を登録してから呼び出します.

@interface ViewController (){
    WKWebView * webView;
    WKUserContentController* userContentController;
}
@end
@implementation ViewController
#pragma mark - lifeCircle
- (void)viewDidLoad {
    [super viewDidLoad];
    //    
    WKWebViewConfiguration * configuration = [[WKWebViewConfiguration alloc]init];
    userContentController =[[WKUserContentController alloc]init];
    configuration.userContentController = userContentController;
    webView = [[WKWebView alloc]initWithFrame:CGRectMake(0, 0, 100, 100) configuration:configuration];
    //    
    WKDelegateController * delegateController = [[WKDelegateController alloc]init];
    delegateController.delegate = self;
 
    [userContentController addScriptMessageHandler:delegateController  name:@"sayhello"];
 
    [self.view addSubview:webView];
    [webView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.equalTo(self.view);
        make.right.equalTo(self.view);
        make.top.equalTo(self.view);
        make.bottom.equalTo(self.view);
    }];
    webView.UIDelegate = self;
    webView.navigationDelegate = self;
    [webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.test.com"]]];
}
- (void)dealloc{
    //      ，           remove 。
    [userContentController removeScriptMessageHandlerForName:@"sayhello"];
}
#pragma mark - WKScriptMessageHandler
- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message{
    NSLog(@"name:%@\\\
 body:%@\\\
 frameInfo:%@\\\
",message.name,message.body,message.frameInfo);
}
@end

WKDelegateController  ：

#import
#import
@protocol WKDelegate
 
- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message;
 
@end
 
@interface WKDelegateController : UIViewController
 
@property (weak , nonatomic) id delegate;
 
@end

.m  ：

#import "WKDelegateController.h"
 
@interface WKDelegateController ()
 
@end
 
@implementation WKDelegateController
 
- (void)viewDidLoad {
    [super viewDidLoad];
}
 
- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message{
    if ([self.delegate respondsToSelector:@selector(userContentController:didReceiveScriptMessage:)]) {
        [self.delegate userContentController:userContentController didReceiveScriptMessage:message];
    }
}
 
 
@end