关于WKWebView 开发中 的 一些 常规问题

点击link不会跳转的解决方案

https://www.jianshu.com/p/60ba6aeb0c42

// 在发送请求之前，决定是否跳转
- (void)webView:(WKWebView*)webView decidePolicyForNavigationAction:(WKNavigationAction*)navigationAction decisionHandler:(void(^)(WKNavigationActionPolicy))decisionHandler {
    NSLog(@"decidePolicyForNavigationAction  ====    %@", navigationAction);
    //如果是跳转一个新页面
    if(navigationAction.targetFrame==nil) {
        [webViewloadRequest:navigationAction.request];
    }
    decisionHandler(WKNavigationActionPolicyAllow);
}

点击 邮箱 ，电话 无法 加载

其实这时候是不需要 跳转的，就让它cancel就可以了

- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {
    //如果是 邮件 或者 电话 停止 跳转
    if (navigationAction.request.URL.host == nil) {
        NSArray *schemeArr = @[@"mailto",@"tel"];
        if ([schemeArr containsObject:navigationAction.request.URL.scheme]) {
            decisionHandler(WKNavigationActionPolicyCancel);
            return;
        }
    }
}

页面 禁止 捏合 放大缩小

// 7页面加载完调用
- (void)webView:(WKWebView *)webView didFinishNavigation:(null_unspecified WKNavigation *)navigation {
    NSString *injectionJSString = @"var script = document.createElement('meta');"
    "script.name = 'viewport';"
    "script.content=\"width=device-width, user-scalable=no\";"
    "document.getElementsByTagName('head')[0].appendChild(script);";
    [webView evaluateJavaScript:injectionJSString completionHandler:nil];
}

网页原始的alert弹不出来

代理里 弹出 系统 的框

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