WKWebView精讲-OC版

  // webview 配置，具体看下面 @property (nonatomic, readonly, copy) WKWebViewConfiguration *configuration;   // 导航代理 @property (nullable, nonatomic, weak) id <WKNavigationDelegate> navigationDelegate;   // 用户交互代理 @property (nullable, nonatomic, weak) id <WKUIDelegate> UIDelegate;   // 页面前进、后退列表 @property (nonatomic, readonly, strong) WKBackForwardList *backForwardList;   // 默认构造器 - (instancetype)initWithFrame:(CGRect)frameconfiguration:(WKWebViewConfiguration *)configurationNS_DESIGNATED_INITIALIZER;   // 已不再使用 - (instancetype)initWithCoder:(NSCoder *)coderNS_UNAVAILABLE;   // 与UIWebView一样的加载请求API - (nullableWKNavigation *)loadRequest:(NSURLRequest *)request;   // 加载URL - (nullableWKNavigation *)loadFileURL:(NSURL *)URLallowingReadAccessToURL:(NSURL *)readAccessURLNS_AVAILABLE(10_11, 9_0);   // 直接加载HTML - (nullableWKNavigation *)loadHTMLString:(NSString *)stringbaseURL:(nullableNSURL *)baseURL;   // 直接加载data - (nullableWKNavigation *)loadData:(NSData *)dataMIMEType:(NSString *)MIMETypecharacterEncodingName:(NSString *)characterEncodingNamebaseURL:(NSURL *)baseURLNS_AVAILABLE(10_11, 9_0);   // 前进或者后退到某一页面 - (nullableWKNavigation *)goToBackForwardListItem:(WKBackForwardListItem *)item;   // 页面的标题，这昆支持KVO的 @property (nullable, nonatomic, readonly, copy) NSString *title;   // 当前请求的URL，它是支持KVO的 @property (nullable, nonatomic, readonly, copy) NSURL *URL;   // 标识当前是否正在加载内容中，它是支持KVO的 @property (nonatomic, readonly, getter=isLoading) BOOL loading;   // 当前加载的进度，范围为[0, 1] @property (nonatomic, readonly) double estimatedProgress;   // 标识页面中的所有资源是否通过安全加密连接来加载，它是支持KVO的 @property (nonatomic, readonly) BOOL hasOnlySecureContent;   // 当前导航的证书链，支持KVO @property (nonatomic, readonly, copy) NSArray *certificateChain NS_AVAILABLE(10_11, 9_0);   // 是否可以招待goback操作，它是支持KVO的 @property (nonatomic, readonly) BOOL canGoBack;   // 是否可以执行gofarward操作，支持KVO @property (nonatomic, readonly) BOOL canGoForward;   // 返回上一页面，如果不能返回，则什么也不干 - (nullableWKNavigation *)goBack;   // 进入下一页面，如果不能前进，则什么也不干 - (nullableWKNavigation *)goForward;   // 重新载入页面 - (nullableWKNavigation *)reload;   // 重新从原始URL载入 - (nullableWKNavigation *)reloadFromOrigin;   // 停止加载数据 - (void)stopLoading;   // 执行JS代码 - (void)evaluateJavaScript:(NSString *)javaScriptStringcompletionHandler:(void (^ __nullable)(__nullableid, NSError * __nullableerror))completionHandler;   // 标识是否支持左、右swipe手势是否可以前进、后退 @property (nonatomic) BOOL allowsBackForwardNavigationGestures;   // 自定义user agent，如果没有则为nil @property (nullable, nonatomic, copy) NSString *customUserAgent NS_AVAILABLE(10_11, 9_0);   // 在iOS上默认为NO，标识不允许链接预览 @property (nonatomic) BOOL allowsLinkPreviewNS_AVAILABLE(10_11, 9_0);   #if TARGET_OS_IPHONE /*! @abstract The scroll view associated with the web view. */ @property (nonatomic, readonly, strong) UIScrollView *scrollView; #endif   #if !TARGET_OS_IPHONE // 标识是否支持放大手势，默认为NO @property (nonatomic) BOOL allowsMagnification;   // 放大因子，默认为1 @property (nonatomic) CGFloat magnification;   // 根据设置的缩放因子来缩放页面，并居中显示结果在指定的点 - (void)setMagnification:(CGFloat)magnificationcenteredAtPoint:(CGPoint)point;   #endif   

  WKWebViewConfiguration *config = [[WKWebViewConfiguration alloc]init];   

  // 设置偏好设置 config.preferences = [[WKPreferences alloc]init]; // 默认为0 config.preferences.minimumFontSize = 10; // 默认认为YES config.preferences.javaScriptEnabled = YES; // 在iOS上默认为NO，表示不能自动通过窗口打开 config.preferences.javaScriptCanOpenWindowsAutomatically = NO;   

  config.processPool = [[WKProcessPool alloc]init];   

  // 只读属性，所有添加的WKUserScript都在这里可以获取到 @property (nonatomic, readonly, copy) NSArray<WKUserScript *> *userScripts;   // 注入JS - (void)addUserScript:(WKUserScript *)userScript;   // 移除所有注入的JS - (void)removeAllUserScripts;   // 添加scriptMessageHandler到所有的frames中，则都可以通过 // window.webkit.messageHandlers.<name>.postMessage(<messageBody>) // 发送消息 // 比如，JS要调用我们原生的方法，就可以通过这种方式了 - (void)addScriptMessageHandler:(id <WKScriptMessageHandler>)scriptMessageHandlername:(NSString *)name;   // 根据name移除所注入的scriptMessageHandler - (void)removeScriptMessageHandlerForName:(NSString *)name;   

  // JS源代码 @property (nonatomic, readonly, copy) NSString *source;   // JS注入时间 @property (nonatomic, readonly) WKUserScriptInjectionTime injectionTime;   // 只读属性，表示JS是否应该注入到所有的frames中还是只有main frame. @property (nonatomic, readonly, getter=isForMainFrameOnly) BOOL forMainFrameOnly;   // 初始化方法，用于创建WKUserScript对象 // source：JS源代码 // injectionTime：JS注入的时间 // forMainFrameOnly：是否只注入main frame - (instancetype)initWithSource:(NSString *)sourceinjectionTime:(WKUserScriptInjectionTime)injectionTimeforMainFrameOnly:(BOOL)forMainFrameOnly;   

  typedef NS_ENUM(NSInteger, WKUserScriptInjectionTime) {     WKUserScriptInjectionTimeAtDocumentStart,     WKUserScriptInjectionTimeAtDocumentEnd } NS_ENUM_AVAILABLE(10_10, 8_0);   

  // 默认数据存储 + (WKWebsiteDataStore *)defaultDataStore;   // 返回非持久化存储，数据不会写入文件系统 + (WKWebsiteDataStore *)nonPersistentDataStore;   // 已经不可用 - (instancetype)initNS_UNAVAILABLE;   // 只读属性，表示是否是持久化存储 @property (nonatomic, readonly, getter=isPersistent) BOOL persistent;   // 获取所有web内容的数据存储类型集，比如cookies、disk等 + (NSSet<NSString *> *)allWebsiteDataTypes;   // 获取某些指定数据存储类型的数据 - (void)fetchDataRecordsOfTypes:(NSSet<NSString *> *)dataTypescompletionHandler:(void (^)(NSArray<WKWebsiteDataRecord *> *))completionHandler;   // 删除某些指定类型的数据 - (void)removeDataOfTypes:(NSSet<NSString *> *)dataTypesforDataRecords:(NSArray<WKWebsiteDataRecord *> *)dataRecordscompletionHandler:(void (^)(void))completionHandler;   // 删除某些指定类型的数据且修改日期是指定的日期 - (void)removeDataOfTypes:(NSSet<NSString *> *)websiteDataTypesmodifiedSince:(NSDate *)datecompletionHandler:(void (^)(void))completionHandler;   

  WK_EXTERN NSString * const WKWebsiteDataTypeDiskCache NS_AVAILABLE(10_11, 9_0);   WK_EXTERN NSString * const WKWebsiteDataTypeMemoryCache NS_AVAILABLE(10_11, 9_0);   WK_EXTERN NSString * const WKWebsiteDataTypeOfflineWebApplicationCache NS_AVAILABLE(10_11, 9_0);   WK_EXTERN NSString * const WKWebsiteDataTypeCookies NS_AVAILABLE(10_11, 9_0);   WK_EXTERN NSString * const WKWebsiteDataTypeSessionStorage NS_AVAILABLE(10_11, 9_0);   WK_EXTERN NSString * const WKWebsiteDataTypeLocalStorage NS_AVAILABLE(10_11, 9_0);   WK_EXTERN NSString * const WKWebsiteDataTypeWebSQLDatabases NS_AVAILABLE(10_11, 9_0);   WK_EXTERN NSString * const WKWebsiteDataTypeIndexedDBDatabases NS_AVAILABLE(10_11, 9_0);   

  // 通常是域名 @property (nonatomic, readonly, copy) NSString *displayName;   // 存储的数据类型集 @property (nonatomic, readonly, copy) NSSet<NSString *> *dataTypes;   

  typedef NS_ENUM(NSInteger, WKSelectionGranularity) {     WKSelectionGranularityDynamic,     WKSelectionGranularityCharacter, } NS_ENUM_AVAILABLE_IOS(8_0);   

  @protocol WKNavigationDelegate <NSObject>   @optional   // 决定导航的动作，通常用于处理跨域的链接能否导航。WebKit对跨域进行了安全检查限制，不允许跨域，因此我们要对不能跨域的链接 // 单独处理。但是，对于Safari是允许跨域的，不用这么处理。 // 这个是决定是否Request - (void)webView:(WKWebView *)webViewdecidePolicyForNavigationAction:(WKNavigationAction *)navigationActiondecisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler;   // 决定是否接收响应 // 这个是决定是否接收response // 要获取response，通过WKNavigationResponse对象获取 - (void)webView:(WKWebView *)webViewdecidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponsedecisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler;   // 当main frame的导航开始请求时，会调用此方法 - (void)webView:(WKWebView *)webViewdidStartProvisionalNavigation:(null_unspecifiedWKNavigation *)navigation;   // 当main frame接收到服务重定向时，会回调此方法 - (void)webView:(WKWebView *)webViewdidReceiveServerRedirectForProvisionalNavigation:(null_unspecifiedWKNavigation *)navigation;   // 当main frame开始加载数据失败时，会回调 - (void)webView:(WKWebView *)webViewdidFailProvisionalNavigation:(null_unspecifiedWKNavigation *)navigationwithError:(NSError *)error;   // 当main frame的web内容开始到达时，会回调 - (void)webView:(WKWebView *)webViewdidCommitNavigation:(null_unspecifiedWKNavigation *)navigation;   // 当main frame导航完成时，会回调 - (void)webView:(WKWebView *)webViewdidFinishNavigation:(null_unspecifiedWKNavigation *)navigation;   // 当main frame最后下载数据失败时，会回调 - (void)webView:(WKWebView *)webViewdidFailNavigation:(null_unspecifiedWKNavigation *)navigationwithError:(NSError *)error;   // 这与用于授权验证的API，与AFN、UIWebView的授权验证API是一样的 - (void)webView:(WKWebView *)webViewdidReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challengecompletionHandler:(void (^)(NSURLSessionAuthChallengeDisposition disposition, NSURLCredential *__nullablecredential))completionHandler;   // 当web content处理完成时，会回调 - (void)webViewWebContentProcessDidTerminate:(WKWebView *)webViewNS_AVAILABLE(10_11, 9_0);   @end   

  typedef NS_ENUM(NSInteger, WKNavigationActionPolicy) {     WKNavigationActionPolicyCancel,     WKNavigationActionPolicyAllow, } NS_ENUM_AVAILABLE(10_10, 8_0);   

  typedef NS_ENUM(NSInteger, WKNavigationResponsePolicy) {     WKNavigationResponsePolicyCancel,     WKNavigationResponsePolicyAllow, } NS_ENUM_AVAILABLE(10_10, 8_0);   

  NS_CLASS_AVAILABLE(10_10, 8_0) @interfaceWKNavigationResponse: NSObject   // 是否是main frame @property (nonatomic, readonly, getter=isForMainFrame) BOOL forMainFrame;   // 获取响应response @property (nonatomic, readonly, copy) NSURLResponse *response;   // 是否显示MIMEType @property (nonatomic, readonly) BOOL canShowMIMEType;   @end   

  // 正在请求的导航的frame @property (nonatomic, readonly, copy) WKFrameInfo *sourceFrame;   // 目标frame，如果这是新的window，它会是nil @property (nullable, nonatomic, readonly, copy) WKFrameInfo *targetFrame;   // 导航类型，如下面的小标题WKNavigationType @property (nonatomic, readonly) WKNavigationType navigationType;   // 导航的请求 @property (nonatomic, readonly, copy) NSURLRequest *request;   

  typedef NS_ENUM(NSInteger, WKNavigationType) { // 链接已经点击     WKNavigationTypeLinkActivated,     // 表单提交     WKNavigationTypeFormSubmitted,     // 前进、后退     WKNavigationTypeBackForward,     // 重新载入     WKNavigationTypeReload,     // 表单重新提交     WKNavigationTypeFormResubmitted,     // 其它     WKNavigationTypeOther = -1, } NS_ENUM_AVAILABLE(10_10, 8_0);   

  @protocol WKUIDelegate <NSObject>   @optional   // 创建新的webview // 可以指定配置对象、导航动作对象、window特性 - (nullableWKWebView *)webView:(WKWebView *)webViewcreateWebViewWithConfiguration:(WKWebViewConfiguration *)configurationforNavigationAction:(WKNavigationAction *)navigationActionwindowFeatures:(WKWindowFeatures *)windowFeatures;   // webview关闭时回调 - (void)webViewDidClose:(WKWebView *)webViewNS_AVAILABLE(10_11, 9_0);   // 调用JS的alert()方法 - (void)webView:(WKWebView *)webViewrunJavaScriptAlertPanelWithMessage:(NSString *)messageinitiatedByFrame:(WKFrameInfo *)framecompletionHandler:(void (^)(void))completionHandler;   // 调用JS的confirm()方法 - (void)webView:(WKWebView *)webViewrunJavaScriptConfirmPanelWithMessage:(NSString *)messageinitiatedByFrame:(WKFrameInfo *)framecompletionHandler:(void (^)(BOOL result))completionHandler;   // 调用JS的prompt()方法 - (void)webView:(WKWebView *)webViewrunJavaScriptTextInputPanelWithPrompt:(NSString *)promptdefaultText:(nullableNSString *)defaultTextinitiatedByFrame:(WKFrameInfo *)framecompletionHandler:(void (^)(NSString * __nullableresult))completionHandler;   @end   

  NS_CLASS_AVAILABLE(10_10, 8_0) @interfaceWKBackForwardList: NSObject   // 当前正在显示的item（页面） @property (nullable, nonatomic, readonly, strong) WKBackForwardListItem *currentItem;   // 后一页，如果没有就是nil @property (nullable, nonatomic, readonly, strong) WKBackForwardListItem *backItem;   // 前一页，如果没有就是nil @property (nullable, nonatomic, readonly, strong) WKBackForwardListItem *forwardItem;   // 根据下标获取某一个页面的item - (nullableWKBackForwardListItem *)itemAtIndex:(NSInteger)index;   // 可以进行goback操作的页面列表 @property (nonatomic, readonly, copy) NSArray<WKBackForwardListItem *> *backList;   // 可以进行goforward操作的页面列表 @property (nonatomic, readonly, copy) NSArray<WKBackForwardListItem *> *forwardList;   @end   

  NS_CLASS_AVAILABLE(10_10, 8_0) @interfaceWKBackForwardListItem: NSObject   // 该页面的URL @property (readonly, copy) NSURL *URL;   // 该页面的title @property (nullable, readonly, copy) NSString *title;   // 初始请求该item的请求的URL @property (readonly, copy) NSURL *initialURL;   @end