關(guān)于更多網(wǎng)頁加載：WKWebKit，Safari，SafariViewController
這里只講UIWebView，使用簡單，性能一般差。

下面的分開講。
WKWebView:iOS8 新框架：WebKit
SafariViewController：iOS9新框架：SafariServices

還有就是直接調(diào)用 Safari：

    NSURL *url = [NSURL URLWithString:@"https://www.baidu.com"];
    [[UIApplication sharedApplication] openURL:url];

加載數(shù)據(jù)

• 1 url 加載

    NSURL* url = [NSURL URLWithString:@"http://www.baidu.com"];//創(chuàng)建URL
    NSURLRequest* request = [NSURLRequest requestWithURL:url];//創(chuàng)建NSURLRequest
    [webView loadRequest:request];//加載
    

• 2 根據(jù)本地html 文本加載

    [webView loadHTMLString:@"htmlString" baseURL:nil];
 

• 3 加載本地數(shù)據(jù) NSData

// 可以加載 pdf，gif，docx  txt等
   NSString *path = [[NSBundle mainBundle] pathForResource:@"test" ofType:@"pdf"];
    [webView loadData:[NSData dataWithContentsOfFile:path] MIMEType:@"application/pdf" textEncodingName:@"utf-8" baseURL:[NSURL URLWithString:@""]];

    // 更多 MIMEType
    // http://tool.oschina.net/commons?type=22013-05-17

一些屬性設(shè)置

// 內(nèi)容顯示范圍設(shè)置
 [webView.scrollView setContentInset:UIEdgeInsetsMake(10, 100, 10, 100)];
    
    webView.scalesPageToFit = YES;// 是否允許縮放？
    webView.dataDetectorTypes = UIDataDetectorTypeAll;  // 自動識別 網(wǎng)址，電話等
    webView.allowsInlineMediaPlayback = YES; // 支持h5 播放
    webView.mediaPlaybackRequiresUserAction = YES;// h5 播放控制
    webView.mediaPlaybackAllowsAirPlay = YES;// 。。。
    webView.suppressesIncrementalRendering = YES;// webView 一次性加載，沒讀取完成就不加載
    webView.keyboardDisplayRequiresUserAction = YES;// 允許使用鍵盤
    
    webView.paginationMode = UIWebPaginationModeUnpaginated;
    /*
     typedef NS_ENUM(NSInteger, UIWebPaginationMode) {
     UIWebPaginationModeUnpaginated,
     UIWebPaginationModeLeftToRight,
     UIWebPaginationModeTopToBottom,
     UIWebPaginationModeBottomToTop,
     UIWebPaginationModeRightToLeft
     };翻頁模式
     */
    
    webView.paginationBreakingMode = UIWebPaginationBreakingModeColumn;
    /*
     typedef NS_ENUM(NSInteger, UIWebPaginationBreakingMode) {
     UIWebPaginationBreakingModePage,
     UIWebPaginationBreakingModeColumn
     };分頁模式
     */
    
    
    // 判斷
    if (webView.canGoBack) {
        NSLog(@"goback");
    }
    if (webView.canGoForward) {
        NSLog(@"goforward");
    }
    if (webView.loading) {
        NSLog(@"loading");
    }
    
    // 事件 操作
    //    [webView stopLoading];
    //    [webView reload];
    //    [webView goBack];
    //    [webView goForward];
    
    // iOS 9 的屬性
    webView.allowsPictureInPictureMediaPlayback = YES;// 畫中畫
    webView.allowsLinkPreview = YES;// 3d touch 預(yù)覽 相關(guān)

代理

// 判斷，是否允許加載
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {

    /*
     typedef NS_ENUM(NSInteger, UIWebViewNavigationType) {
     UIWebViewNavigationTypeLinkClicked,
     UIWebViewNavigationTypeFormSubmitted,
     UIWebViewNavigationTypeBackForward,
     UIWebViewNavigationTypeReload,
     UIWebViewNavigationTypeFormResubmitted,
     UIWebViewNavigationTypeOther
     };
     */
    
    if(navigationType == UIWebViewNavigationTypeLinkClicked) {
        //判斷是否是點(diǎn)擊鏈接
        return NO;
    } else {
        return YES;
    }
}

- (void)webViewDidStartLoad:(UIWebView *)webView {
    NSLog(@"start");
}

- (void)webViewDidFinishLoad:(UIWebView *)webView {
    NSLog(@"finish");
    
    // 也是一些屬性內(nèi)容
    NSLog(@"%f",webView.pageLength);
    NSLog(@"%f",webView.gapBetweenPages);
    NSLog(@"%zi",webView.pageCount);
    NSLog(@"%@",webView.request);
    
    [webView stringByEvaluatingJavaScriptFromString:@""];// 使用js 代碼執(zhí)行操作
    
}

- (void)webView:(UIWebView *)webView didFailLoadWithError:(nullable NSError *)error {
    NSLog(@"error");
}

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