URLWithString返回null

Question

我的代码必须更新网页视图和下载网站。但它并不是因为URLWithString返回null。我怎么解决这个问题？ {0}已被弃用。

stringByAddingPercentEscapesUsingEncoding

Answer 1

尝试

  -(void) setWebViewMain:(NSString *) link {
// link = @"http://www.rbc.ru/society/05/09/2017/59ae2dfe9a794753f05e3e06"; if this string uncomment code is working

NSURL *url = [NSURL URLWithString: [NSString stringWithFormat:@"%@",link]];

NSLog(@"%@",url); // here url is (null)

NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
[self.webView loadRequest:requestObj];
// [self.webView reload];

}

Answer 2

只需删除方法中的最后一行即可：

-(void) setWebViewMain:(NSString *) link {
    // link = @"http://www.rbc.ru/society/05/09/2017/59ae2dfe9a794753f05e3e06"; if this string uncomment code is working

    NSURL *url = [NSURL URLWithString: link];

    NSLog(@"%@",url); // here url is (null)

    NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
    [self.webView loadRequest:requestObj];
    //[self.webView reload];
}

您可以这样称呼它：

[self setWebViewMain:@"http://www.rbc.ru/society/05/09/2017/59ae2dfe9a794753f05e3e06"];