添加文档

README.md

@@ -155,6 +155,10 @@ Most of the parameters and methods are same like UIWebView, the following descri
 
     > Get cookies in `NSHTTPCookieStorage` and set the cookie for TWebView, the `forceOverride` parameter control use the cookie value in `NSHTTPCookieStorage` to reset the cookie of the same name that existed before TWebView, if `forceOverride` is `NO/false`, will don't reset the same name cookie.
 
+- `- (void)getDocumentTitle:(void (^)(NSString * _Nullable))completion`
+
+    > Take out the page's `title` to `completion`(it was use `JavaScript` to get the web page in the `document.title`)
+
 - `+ (nullable NSString *)getJavascriptStringWithFunctionName:(NSString *)function data:(id)data`
 
     > Class method to get `JavaScript function`, `function` parameter to access the JavaScript method name (no need to add brackets), `data` parameters can be `JSON Object` or ordinary `NSString`, will automatically convert Stitching; returns a function call string after splicing.

README_CN.md

@@ -156,6 +156,10 @@ github "tobedefined/TWebKit" ~> 1.1.1
 
     > 取出`NSHTTPCookieStorage`中的cookies设置TWebView的cookie，`forceOverride`参数控制是否强制使用`NSHTTPCookieStorage`中的cookie值重设TWebView之前存在的同名的cookie
 
+- `- (void)getDocumentTitle:(void (^)(NSString * _Nullable))completion`
+
+    > 取出网页的`title`放入block `completion`，使用`JavaScript`获得网页HTML中的`document.title`
+
 - `+ (nullable NSString *)getJavascriptStringWithFunctionName:(NSString *)function data:(id)data`
 
     > 类方法提供拼接JavaScript函数功能，`function`参数为要访问的JavaScript的方法名(不需要添加括号)，`data`参数可以为`JSON Object`或者为普通的`NSString`，会自动进行转换拼接；返回拼接后的函数调用字符串。