WKWebView不显示JS的Alert,Confirm,Tex

最新项目使用网页加载页面的基本上都由UIWebView转到WKWebView了,然后刚刚才发现用了WKWebView之后不会弹窗提示了,查了一下知道原来WKWebView默认禁止了下面的跳转:

• 打开itunes.apple.com跳转到App Store, 拨打电话, 唤起邮箱等一系列操作
• JS的Alert,Confirm,TextInput弹框

解决方法:
首先实现WKUIDelegate代理方法

解决唤不起打电话和跳转系统应用的方法

- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {

    NSURL *URL = navigationAction.request.URL;
    NSString *scheme = [URL scheme];
    UIApplication *app = [UIApplication sharedApplication];
    // 打电话
    if ([scheme isEqualToString:@"tel"]) {
        if ([app canOpenURL:URL]) {
            [app openURL:URL];
            // 一定要加上这句,否则会打开新的页面
            decisionHandler(WKNavigationActionPolicyCancel);
            return;
        }
    }
    // 打开App Store
    if ([url.absoluteString containsString:@"ituns.apple.com"]) {
        if ([app canOpenURL:url]) {
            [app openURL:url];
            decisionHandler(WKNavigationActionPolicyCancel);
            return;
        }
        decisionHandler(WKNavigationActionPolicyAllow);
    }
}

解决JS的Alert,Confirm,TextInput不弹框的方法

#pragma mark -  Alert弹窗
- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(void))completionHandler {
    UIAlertController * alertController = [UIAlertController alertControllerWithTitle:@"提示" message:message ? : @"" preferredStyle:UIAlertControllerStyleAlert];
    UIAlertAction * action = [UIAlertAction actionWithTitle:@"确认" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        completionHandler();
    }];
    [alertController addAction:action];
    [self presentViewController:alertController animated:YES completion:nil];
}

#pragma mark -  Confirm弹框
- (void)webView:(WKWebView *)webView runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(BOOL))completionHandler {
    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"提示" message:message ? : @"" preferredStyle:UIAlertControllerStyleAlert];
    
    UIAlertAction * cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        completionHandler(NO);
    }];
    
    UIAlertAction * confirmAction = [UIAlertAction actionWithTitle:@"确认" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        completionHandler(YES);
    }];
    
    [alertController addAction:cancelAction];
    [alertController addAction:confirmAction];
    
    [self presentViewController:alertController animated:YES completion:nil];
}

#pragma mark -  TextInput弹框
- (void)webView:(WKWebView *)webView runJavaScriptTextInputPanelWithPrompt:(NSString *)prompt defaultText:(NSString *)defaultText initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(NSString * _Nullable))completionHandler {
    
    UIAlertController * alertController = [UIAlertController alertControllerWithTitle:prompt message:@"" preferredStyle:UIAlertControllerStyleAlert];
    [alertController addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
        textField.text = defaultText;
    }];
    UIAlertAction * action = [UIAlertAction actionWithTitle:@"完成" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        completionHandler(alertController.textFields[0].text ? : @"");
    }];
    [alertController addAction:action];
    
    [self presentViewController:alertController animated:YES completion:nil];
}