WKWebView提示框不显示问题

记得,关联wkUIdelegate，添加<WKUIDelegate>

wkWebView.UIDelegate=self;

#pragma mark =========wkUIdelegate实现：
- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(void))completionHandler {
    NSLog(@"我是“警告”提示框");
    NSLog(@"%@", message);
    // 确定按钮
    UIAlertAction *alertAction = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
     /*
       默认为yes。completionHandler(YES),允许加载 允许用户选择后的操作
       completionHandler(NO),不允许加载  返回用户选择前的操作
   */
        completionHandler();
    }];
    // alert弹出框   
    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:message message:nil preferredStyle:UIAlertControllerStyleAlert];
    [alertController addAction:alertAction];
    [self presentViewController:alertController animated:YES completion:nil];
}
#pragma mark Confirm选择框
- (void)webView:(WKWebView *)webView runJavaScriptConfirmPanelWithMessage:(nonnull NSString *)message initiatedByFrame:(nonnull WKFrameInfo *)frame completionHandler:(nonnull void (^)(BOOL))completionHandler {
       NSLog(@"我是 选择 提示框");
     NSLog(@"%@", message);
    // 按钮
    UIAlertAction *alertActionCancel = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
        // 返回用户选择前的信息
        completionHandler(NO);
    }];
    UIAlertAction *alertActionOK = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        completionHandler(YES);
    }];
    // alert弹出框
    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:message message:nil preferredStyle:UIAlertControllerStyleAlert];
    [alertController addAction:alertActionCancel];
    [alertController addAction:alertActionOK];
    [self presentViewController:alertController animated:YES completion:nil];
}

#pragma mark TextInput输入框
- (void)webView:(WKWebView *)webView runJavaScriptTextInputPanelWithPrompt:(nonnull NSString *)prompt defaultText:(nullable NSString *)defaultText initiatedByFrame:(nonnull WKFrameInfo *)frame completionHandler:(nonnull void (^)(NSString * _Nullable))completionHandler {
       NSLog(@"我是输入提示框3");
       NSLog(@"%@", message);
    // alert弹出框
    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:prompt message:nil preferredStyle:UIAlertControllerStyleAlert];
    // 输入框
    [alertController addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
        textField.placeholder = defaultText;
    }];
    // 确定按钮
    [alertController addAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        // 返回用户输入的信息
        UITextField *textField = alertController.textFields.firstObject;
        completionHandler(textField.text);
    }]];
    // 显示
    [self presentViewController:alertController animated:YES completion:nil];
    
}

如果帮助到您，点击喜欢，给个赞，支持一下。感激不尽