十九.WKWebViewシンプル使用+サードパーティのプログレスバー

iOS 8以降、アップルは新しいフレームワークWebkitを発売し、UIWebViewに代わるコンポーネントWKWebViewを提供した.
WKWebViewの機能:

性能は高くて、安定性は良くて、占有するメモリは比較的に小さい

JSインタラクション

をサポート

HTML 5の新機能

をサポート

進捗バーを追加できます(これは私が選んだのはサードパーティで、最後に紹介します)

は組み込みジェスチャーをサポートし、

60 fpsまでのスクロールリフレッシュ率および内蔵ジェスチャー1.作成1.Wbkitというクラスライブラリ2をインポートする.WebViewのオブジェクトを作成する(基本的にuiwebviewと一致する)

    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       
//          
- (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;

2.WKNavigtionDelegate      
//                
- (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;

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();
}

いくつかのインタラクションの使用方法については、以下を参照してください.http://www.cocoachina.com/ios/20161121/18142.html
サードパーティの進捗バーNJKWebViewProgressを使用しています
(もちろん、プログレスバーを使用する場合はuivebviewのコントロールを使用します)接続:https://github.com/ninjinkun/NJKWebViewProgress

#import "detailTeachVC.h"
#import "NJKWebViewProgress.h"
#import "NJKWebViewProgressView.h"
@interface detailTeachVC ()
{
    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;//#         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
{

}