ios - 我的第一个 iOS 应用程序。我的 ViewController 中有一个 UIWebView 我想更新

Question

我的 ViewController 中有一个 UIWebView，我想在 UIApplicationDelegate 传递一个 URL 时更新它, 喜欢

myApp://?changeWebView=newstuff

我正在根据传入的数据构建新的 URL，但我不知道如何更新我的 UIWebView

我的 AppDelegate.m 中有这个:

- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url
  sourceApplication:(NSString *)sourceApplication annotation:(id)annotation
{
    NSLog(@"Calling Application Bundle ID: %@", sourceApplication);
    NSLog(@"URL scheme:%@", [url scheme]);
    NSLog(@"URL query: %@", [url query]);
    NSLog(@"URL hash: %@", [url fragment]);

    NSURL *newURL = [NSURL URLWithString:@"URL constructed with pieces of passed URL data"];
    NSURLRequest *requestObj = [NSURLRequest requestWithURL:newURL];


 //now I want to update the UIWebview defined in my ViewController.h

    return YES;
}

Answer 1

您可以使用 loadRequest 在 webView 中加载请求

[self.myWebView loadRequest:requestObj];把这一行放在你的代码中

您可以发布通知让您的 View Controller 知道您可以加载 webview。

- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url
  sourceApplication:(NSString *)sourceApplication annotation:(id)annotation
{
    NSLog(@"Calling Application Bundle ID: %@", sourceApplication);
    NSLog(@"URL scheme:%@", [url scheme]);
    NSLog(@"URL query: %@", [url query]);
    NSLog(@"URL hash: %@", [url fragment]);

    NSURL *newURL = [NSURL URLWithString:@"URL constructed with pieces of passed URL data"];
    NSURLRequest *requestObj = [NSURLRequest requestWithURL:newURL];

      //Post Notification
      [[NSNotificationCenter defaultCenter] postNotificationName:@"loadRequest"
                                  object:nil
                                  userInfo:@{@"requestObj":requestObj}];

    return YES;
}

现在在你的 viewController 中添加通知观察者

-(void)viewDidLoad{

        //Add observer for notification
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(receiveEvent:) name:@"loadRequest" object:nil];
}

在你的 ViewController 中编写此方法以在 webView 中加载请求

- (void)receiveEvent:(NSNotification *)notification {
    // handle event
        NSURLRequest *requestObj = notification.userInfo[@"requestObj"];
       [self.myWebView loadRequest:requestObj];         
}