IOS中UIWebView、WKWebView之JS交互

2020-07-26 02:47:41

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做客户端开发，肯定避免不了JS交互，于是自己对苹果接口做了个简易封装：

JSExport-->UIWebView+Interaction、WKScriptMessageHandler -->WKWebView+Interaction以备以后使用。

代码非常简洁，见这里：https://github.com/V5zhou/JSInteraction.git

旧方式

旧的交互方式有通过UIWebViewDelegate实现的：JS与客户端定义好跳转页面参数，在将要跳转时捕获关键字，然后处理业务。

iOS端：

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {  NSString *urlString = [[request URL] absoluteString];  if ([urlString isEqualToString:@"objc://loading"]) {    if (_gotoRootViewController) {      _gotoRootViewController();    }  }  return YES;}

JS端：

<!DOCTYPE html><html>  <title>test</title>  <meta charset="utf-8">    <body>      <a href="javascript:document.location = 'objc://loading'" rel="external nofollow" class="btn">这是交互按钮</a>    </body></html>

UIWebView+JSExport方式

导入JavaScriptCore.framework，并导入我的扩展类#import "UIWebView+Interaction.h"。

使用方式

OC调JS：

[_webView InterActionToJs:@"alertMobile('15625298071')"];

JS调OC:

- (void)webViewDidFinishLoad:(UIWebView *)webView {  [self.webView InterActionToOc:^(InterActionOcType functionType, NSDictionary *param) {    switch (functionType) {      case InterActionOcType_alert:      {        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:param[@"title"] message:param[@"content"] delegate:nil cancelButtonTitle:nil otherButtonTitles:@"确定", nil];        [alert show];      }        break;      case InterActionOcType_present:      {        self.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;        Class Cls = NSClassFromString(param[@"toController"]);        BOOL isAnimate = [param[@"animate"] boolValue];        UIViewController *ctl = [[Cls alloc] init];        [self presentViewController:ctl animated:isAnimate completion:nil];      }        break;      default:        break;    }  }];}

添加动作

//自定义添加功能类型typedef NS_ENUM(NSUInteger, InterActionOcType) {  InterActionOcType_alert = 0,  InterActionOcType_present,  InterActionOcType_xxxxxxx,   //有啥需求就和这里添加};

并且对应的html中添加JS,参数封装为字典形式。例：

function myPresent(ctl) {      var param = new Array();      param["animate"] = 1;      param["toController"] = "SecondViewController";      WebViewInteraction.callBack(1, param);    }

其中callBack是通过这个JSExport实现的

@protocol WebViewJSExport <JSExport>JSExportAs(callBack /** callBack 作为js方法的别名 */, - (void)awakeOC:(InterActionOcType)type param:(NSDictionary *)param );@end

WKWebView+WKScriptMessageHandler方式

导入WebKit.framework，并导入我的扩展类#import "WKWebView+Interaction.h"。

使用方式

OC调JS：

[self.wkWebView InterActionToJs:@"JSReloadTitle('你点了刷新JS按钮，我没猜错！')"];

JS调OC:

//注册交互类型  [self.wkWebView registerScriptTypes:@{@"OCDismiss" : @(WKInterActionOcType_dismiss),                     @"OCShowAlert" : @(WKInterActionOcType_alert)}];  [self.wkWebView InterActionToOc:^(WKInterActionOcType functionType, NSDictionary *param) {    switch (functionType) {      case WKInterActionOcType_dismiss:      {        BOOL isAnimate = [param[@"animate"] boolValue];        [self dismissViewControllerAnimated:isAnimate completion:nil];      }        break;      case WKInterActionOcType_alert:      {        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"JS去做平方" message:nil delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"确定", nil];        alert.alertViewStyle = UIAlertViewStylePlainTextInput;        [alert show];      }        break;      default:        break;    }  }];

添加动作

//自定义添加功能类型typedef NS_ENUM(NSUInteger, WKInterActionOcType) {  WKInterActionOcType_alert = 0,  WKInterActionOcType_dismiss,  WKInterActionOcType_xxxxxxx,   //有啥需求就和这里添加};

并且对应的html中添加JS,参数封装为字典形式。例：

//js调ocfunction myDismiss() {  window.webkit.messageHandlers.OCDismiss.postMessage({"animate" : 1});  //这里的OCDismiss对应注册类型}

其中callBack是通过WKScriptMessageHandler实现的

- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message {  dispatch_async(dispatch_get_main_queue(), ^{    NSString *name = message.name;    NSDictionary *value = message.body;    WKInterActionOcType type = [self.typeDict[name] integerValue];    if (self.block) {      self.block(type, value);    }  });}

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