ios UIWebView 无法显示加载的url，浏览器可以打开

//1. UIWebView 无法显示加载的url，浏览器可以打开    //报错如下UIWebView error 101    //解决:    UIWebView *_webView;    NSString *_requestURL;    NSString *encodedString = [_requestURL stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];    NSURL *weburl = [NSURL URLWithString:encodedString];    [_webView loadRequest:[NSURLRequest requestWithURL:weburl]];