iOS-WKWebView的使用 - iOS

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iOS-WKWebView的使用(三)

2019-08-31 01:04:46 【大中小】浏览:131次

(void (^)(void))completionHandler; // 保存的HTTP cookies @property (nonatomic, readonly) WKHTTPCookieStore *httpCookieStore

dataTypes:

// 硬盘缓存
WKWebsiteDataTypeDiskCache,
// HTML离线web应用程序缓存
WKWebsiteDataTypeOfflineWebApplicationCache,
// 内存缓存
WKWebsiteDataTypeMemoryCache,
// 本地缓存
WKWebsiteDataTypeLocalStorage,
// cookies
WKWebsiteDataTypeCookies,
// HTML会话存储
WKWebsiteDataTypeSessionStorage,
//  IndexedDB 数据库
WKWebsiteDataTypeIndexedDBDatabases,
// WebSQL 数据库
WKWebsiteDataTypeWebSQLDatabases

dataRecord:

// 展示名称, 通常是域名
@property (nonatomic, readonly, copy) NSString *displayName;
// 包含的数据类型
@property (nonatomic, readonly, copy) NSSet<NSString *> *dataTypes;

关于此类的简单使用：

1.删除指定时间的所有类型数据

    NSSet *websiteDataTypes = [WKWebsiteDataStore allWebsiteDataTypes];
    NSDate *dateFrom = [NSDate dateWithTimeIntervalSince1970:0];
    [[WKWebsiteDataStore defaultDataStore] removeDataOfTypes:websiteDataTypes modifiedSince:dateFrom completionHandler:^{
        // Done
        NSLog(@"释放");
    }];

2.查找删除

    WKWebsiteDataStore *dataStore = [WKWebsiteDataStore defaultDataStore];
    [dataStore fetchDataRecordsOfTypes:[WKWebsiteDataStore allWebsiteDataTypes] completionHandler:^(NSArray<WKWebsiteDataRecord *> * _Nonnull records) {
        for (WKWebsiteDataRecord *record in records) {
            [dataStore removeDataOfTypes:record.dataTypes forDataRecords:@[record] completionHandler:^{
                // done
            }];
        }
    }];

3.查找删除特定的内容

   WKWebsiteDataStore *dataStore = [WKWebsiteDataStore defaultDataStore];
    [dataStore fetchDataRecordsOfTypes:[WKWebsiteDataStore allWebsiteDataTypes] completionHandler:^(NSArray<WKWebsiteDataRecord *> * _Nonnull records) {
        for (WKWebsiteDataRecord *record in records) {
            if ([record.displayName isEqualToString:@"baidu"]) {
                [dataStore removeDataOfTypes:record.dataTypes forDataRecords:@[record] completionHandler:^{
                    // done
                }];
            }
        }
    }];

WKNavigationDelegate:

#pragma mark - WKNavigationDelegate

//请求加载之前，决定是否跳转
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler{
    NSLog(@"加载前允许跳转");
    decisionHandler(WKNavigationActionPolicyAllow);
}
//开始加载时调用
- (void)webView:(WKWebView *)webView didStartProvisionalNavigation:(null_unspecified WKNavigation *)navigation{
    NSLog(@"开始加载");
}
//收到响应开始加载后，决定是否跳转
- (void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponse decisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler{
    NSLog(@"收到响应后允许跳转");
    decisionHandler(WKNavigationResponsePolicyAllow);
}
//内容开始返回时调用
- (void)webView:(WKWebView *)webView didCommitNavigation:(null_unspecified WKNavigation *)navigation{
    NSLog(@"开始返回内容");
}
//加载完成时调用
- (void)webView:(WKWebView *)webView didFinishNavigation:(null_unspecified WKNavigation *)navigation{
    NSLog(@"加载完成");
    self.title = webView.title;
}
//加载失败调用
- (void)webView:(WKWebView *)webView didFailProvisionalNavigation:(null_unspecified WKNavigation *)navigation

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