WTWebView 1.0.0

WTWebView 1.0.0

×

TestsTested ✗
LangLanguage Obj-CObjective C
License MIT
ReleasedLast Release Aug 2017

Maintained by hongruqi.

WTWebView 1.0.0

  • By
  • lbrsilva-allin

Example

To run the example project, clone the repo, and run pod install from the Example directory first.

Requirements

Installation

WTWebView is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod "WTWebView"

Author

lbrsilva-allin, [email protected]

License

WTWebView is available under the MIT license. See the LICENSE file for more info. ##前言 WKWebView是在Apple的WWDC 2014发布，将原有UIWebViewDelegate与UIWebView重构成了14类与3个协议。 WKWebView，在iOS8和OS X 10.10开始支持，是为了解决UIWebView加载速度慢、占用内存大的问题。 在使用UIWebView加载网页的时候，会出现内存会无限增长，内存泄漏的问题。 WebKit中WKWebView控件的特性与使用方法，很好的解决了UIWebView存在的内存、加载速度等诸多问题。

一、WKWebView 特性

  • 占用更少的内存
  • Safari相同的JavaScript引擎
  • 支持了更多的HTML5特性；
  • 支持手势返回
  • 滚动刷新率可达到60fps，堪比native

##webkit WebKit.png ##OC与JS交互 WKWebview提供了API实现js交互 不需要借助JavaScriptCore或者webJavaScriptBridge。 ###WKWebView WKWebView对象显示交互式Web内容，例如针对应用内浏览器。 您可以使用WKWebView类将Web内容嵌入到您的应用程序中。 只需要创建一个WKWebView对象，并向其发送加载Web内容的请求。 API

初始化

- (instancetype)initWithFrame:(CGRect)frame configuration:(WKWebViewConfiguration *)configuration

常用方法

- (nullable WKNavigation *)loadRequest:(NSURLRequest *)request;
- (nullable WKNavigation *)loadHTMLString:(NSString *)string baseURL:(nullable NSURL *)baseURL;
- (nullable WKNavigation *)goBack;
- (nullable WKNavigation *)goForward;
// Reloads the current page.
- (nullable WKNavigation *)reload;
- (nullable WKNavigation *)reloadFromOrigin;

###WKNavigtionDelegate

// 页面开始加载时调用
- (void)webView:(WKWebView *)webView didStartProvisionalNavigation:(WKNavigation *)navigation;
// 当内容开始返回时调用
- (void)webView:(WKWebView *)webView didCommitNavigation:(WKNavigation *)navigation;
// 页面加载完成之后调用
- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation;
// 页面加载失败时调用
- (void)webView:(WKWebView *)webView didFailProvisionalNavigation:(WKNavigation *)navigation;
// 接收到服务器跳转请求之后再执行
- (void)webView:(WKWebView *)webView didReceiveServerRedirectForProvisionalNavigation:(WKNavigation *)navigation;
// 在收到响应后，决定是否跳转
- (void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponse decisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler;
// 在发送请求之前，决定是否跳转
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler;

###WKUIDelegate

//1.创建一个新的WebVeiw
- (nullable WKWebView *)webView:(WKWebView *)webView createWebViewWithConfiguration:(WKWebViewConfiguration *)configuration forNavigationAction:(WKNavigationAction *)navigationAction windowFeatures:(WKWindowFeatures *)windowFeatures;
//2.WebVeiw关闭（9.0中的新方法）
- (void)webViewDidClose:(WKWebView *)webView NS_AVAILABLE(10_11, 9_0);
//3.显示一个JS的Alert（与JS交互）
- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(void))completionHandler;
//4.弹出一个输入框（与JS交互的）
- (void)webView:(WKWebView *)webView runJavaScriptTextInputPanelWithPrompt:(NSString *)prompt defaultText:(nullable NSString *)defaultText initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(NSString * __nullable result))completionHandler;
//5.显示一个确认框（JS的）
- (void)webView:(WKWebView *)webView runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(BOOL result))completionHandler;

JS调用OC

使用WKUserContentController实现js=>native交互。简单的说就是先注册约定好的方法，然后再调用。 流程图：

op=>operation: 配置环境
op1=>operation: 注册方法
op->op1

代码：

//配置环境，使用WKWebViewConfiguration
WKWebViewConfiguration *configuration = [[WKWebViewConfiguration alloc] init];
configuration.allowsInlineMediaPlayback = YES;
WKUserContentController *userContentController = [[WKUserContentController alloc] init];
configuration.userContentController = userContentController;
//注册方法
／*
self.hybrid 是WTWebViewJSBridge类实例，处理js调用native方法
BridgeName js 方法名
*／
[userContentController addScriptMessageHandler:self.hybrid name:BridgeName];

JS回调处理

//WTWebViewJSBridge.m
- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message
{
    if ([message.name isEqualToString:BridgeName]) {
        if ([message.body isKindOfClass:[NSDictionary class]]) {
            [self postMessage:message.body];
        }
    }
}

###OC调用JS 这个简单多了，直接用WKWebview，evaluateJavaScript方法进行调用

- (void)evaluateJavaScript:(NSString *)javaScriptString completionHandler:(void (^)(id, NSError *))completionHandler
{
    if (self.webkit) {
        [self.webkit evaluateJavaScript:javaScriptString completionHandler:completionHandler];
    }
}