Question

大家好我正在尝试加载一个html页面，加载后我想要执行change.php?lang=eng。程序启动时我现在有了这个：

- (void)viewDidLoad {
    [super viewDidLoad];
    self.title = @"Treviturismo.it";
    link = @"http://www.treviturismo.it/dev/index.php";
    NSURL *url = [NSURL URLWithString:link];
    NSURLRequest *requestObj=[NSURLRequest requestWithURL:url];
    [myWebView loadRequest:requestObj];
}

也许我可以使用IF检查页面是否已加载，然后：

link = @"http://www.treviturismo.it/dev/change.php?lang=en";
NSURL *url = [NSURL URLWithString:link];
requestObj=[NSURLRequest requestWithURL:url];
[myWebView loadRequest:requestObj];

这是一个好方法吗？我不知道在if()输入什么，以检查第一页是否已加载！谁能帮我？谢谢！

Answer 1

您应该使用UIWebViewDelegate协议来监听页面加载事件。

- (void)viewDidLoad
{
   [super viewDidLoad];
   // init code...

   myWebView.delegate = self; // your class must implement the UIWebViewDelegate protocol

   link = @"http://www.treviturismo.it/dev/index.php";
   NSURL *url = [NSURL URLWithString:link];
   NSURLRequest *requestObj=[NSURLRequest requestWithURL:url];
   [myWebView loadRequest:requestObj];
}

- (void)webViewDidFinishLoad:(UIWebView *)webView
{
   // if you want this method to not being called again, do this :
   webView.delegate = nil;

   // then do your request to change.php here
   link = @"http://www.treviturismo.it/dev/change.php?lang=en";
   NSURL *url = [NSURL URLWithString:link];
   requestObj=[NSURLRequest requestWithURL:url];
   [webView loadRequest:requestObj];
}

（XCODE IPHONE）加载网页后通过change.php？lang = en更改语言

1 个答案: