WKWebView

 
// 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)frame configuration:(WKWebViewConfiguration *)configuration NS_DESIGNATED_INITIALIZER;
 
// 已不再使用
- (instancetype)initWithCoder:(NSCoder *)coder NS_UNAVAILABLE;
 
// 与UIWebView一样的加载请求API
- (nullable WKNavigation *)loadRequest:(NSURLRequest *)request;
 
// 加载URL
- (nullable WKNavigation *)loadFileURL:(NSURL *)URL allowingReadAccessToURL:(NSURL *)readAccessURL NS_AVAILABLE(10_11, 9_0);
 
// 直接加载HTML
- (nullable WKNavigation *)loadHTMLString:(NSString *)string baseURL:(nullable NSURL *)baseURL;
 
// 直接加载data
- (nullable WKNavigation *)loadData:(NSData *)data MIMEType:(NSString *)MIMEType characterEncodingName:(NSString *)characterEncodingName baseURL:(NSURL *)baseURL NS_AVAILABLE(10_11, 9_0);
 
// 前进或者后退到某一页面
- (nullable WKNavigation *)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
- (nullable WKNavigation *)goBack;
 
// 进入下一页面，如果不能前进，则什么也不干
- (nullable WKNavigation *)goForward;
 
// 重新载入页面
- (nullable WKNavigation *)reload;
 
// 重新从原始URL载入
- (nullable WKNavigation *)reloadFromOrigin;
 
// 停止加载数据
- (void)stopLoading;
 
// 执行JS代码
- (void)evaluateJavaScript:(NSString *)javaScriptString completionHandler:(void (^ __nullable)(__nullable id, NSError * __nullable error))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 allowsLinkPreview NS_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)magnification centeredAtPoint:(CGPoint)point;
 
#endif
```` 
 
 
## WKWebViewConfiguration配置

	WKWebViewConfiguration *config = [[WKWebViewConfiguration alloc] init];
 
## WKPreferences偏好设置

目前在iOS平台上偏好设置只有三个属性可以设置，如下：

```` 
// 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>)scriptMessageHandler name:(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 *)source injectionTime:(WKUserScriptInjectionTime)injectionTime forMainFrameOnly:(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)init NS_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 *> *)dataTypes completionHandler:(void (^)(NSArray<WKWebsiteDataRecord *> *))completionHandler;
 
// 删除某些指定类型的数据
- (void)removeDataOfTypes:(NSSet<NSString *> *)dataTypes forDataRecords:(NSArray<WKWebsiteDataRecord *> *)dataRecords completionHandler:(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 *> *)websiteDataTypes modifiedSince:(NSDate *)date completionHandler:(void (^)(void))completionHandler;
 
```` 
所有的dataTypes是下面这些系统所定义的：

```` 
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;
```` 
 
## WKSelectionGranularity选择粒度

它表示在webview上选择内容的粒度，只有下面这两种类型：

```` 
typedef NS_ENUM(NSInteger, WKSelectionGranularity) {
    WKSelectionGranularityDynamic,
    WKSelectionGranularityCharacter,
} NS_ENUM_AVAILABLE_IOS(8_0);
```` 
它是用于webview内容交互时选择内容的粒度类型设置。比如说，当使用WKSelectionGranularityDynamic时，而所选择的内容是单个块，这时候granularity可能会是单个字符；当所选择的web内容不限制于某个块时，granularity可能会是单个块。


## WKNavigationDelegate

```` 
@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 *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(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 *)webView decidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponse decisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler;
 
// 当main frame的导航开始请求时，会调用此方法
- (void)webView:(WKWebView *)webView didStartProvisionalNavigation:(null_unspecified WKNavigation *)navigation;
 
// 当main frame接收到服务重定向时，会回调此方法
- (void)webView:(WKWebView *)webView didReceiveServerRedirectForProvisionalNavigation:(null_unspecified WKNavigation *)navigation;
 
// 当main frame开始加载数据失败时，会回调
- (void)webView:(WKWebView *)webView didFailProvisionalNavigation:(null_unspecified WKNavigation *)navigation withError:(NSError *)error;
 
// 当main frame的web内容开始到达时，会回调
- (void)webView:(WKWebView *)webView didCommitNavigation:(null_unspecified WKNavigation *)navigation;
 
// 当main frame导航完成时，会回调
- (void)webView:(WKWebView *)webView didFinishNavigation:(null_unspecified WKNavigation *)navigation;
 
// 当main frame最后下载数据失败时，会回调
- (void)webView:(WKWebView *)webView didFailNavigation:(null_unspecified WKNavigation *)navigation withError:(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 *)webView didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge completionHandler:(void (^)(NSURLSessionAuthChallengeDisposition disposition, NSURLCredential *__nullable credential))completionHandler;
 
// 当web content处理完成时，会回调
- (void)webViewWebContentProcessDidTerminate:(WKWebView *)webView NS_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);
```` 
## WKNavigationResponse

WKNavigationResponse是导航响应类，通过它可以获取相关响应的信息：

```` 
NS_CLASS_AVAILABLE(10_10, 8_0)
@interface WKNavigationResponse : 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
```` 
只有接收响应与不接收响应两种。

## WKNavigationAction

WKNavigationAction对象包含关于导航的action的信息，用于make policy decisions。它只有以下几个属性：

```` 
// 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;
 
```` 
 
## WKNavigationType

WKNavigationType类型是枚举类型，它的可选值如下:

```` 
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);
```` 
## WKUIDelegate

```` 
@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
- (nullable WKWebView *)webView:(WKWebView *)webView createWebViewWithConfiguration:(WKWebViewConfiguration *)configuration forNavigationAction:(WKNavigationAction *)navigationAction windowFeatures:(WKWindowFeatures *)windowFeatures;
 
// webview关闭时回调
- (void)webViewDidClose:(WKWebView *)webView NS_AVAILABLE(10_11, 9_0);
 
// 调用JS的alert()方法
- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(void))completionHandler;
 
// 调用JS的confirm()方法
- (void)webView:(WKWebView *)webView runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(BOOL result))completionHandler;
 
// 调用JS的prompt()方法
- (void)webView:(WKWebView *)webView runJavaScriptTextInputPanelWithPrompt:(NSString *)prompt defaultText:(nullable NSString *)defaultText initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(NSString * __nullable result))completionHandler;
 
@end
```` 
## WKBackForwardList

WKBackForwardList表示webview中可以前进或者后退的页面列表。其声明如下：

```` 
NS_CLASS_AVAILABLE(10_10, 8_0)
@interface WKBackForwardList : 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
- (nullable WKBackForwardListItem *)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)
@interface WKBackForwardListItem : 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