Objective-C UIWebView初始化錯誤

Question

當我試圖執行這段代碼時，我的應用程序崩潰。我是Objective-C的新手，所以我不確定問題是什麼。

- (void)loadWebView:(NSURL *)url { 
     UIWebView *nWeb = _webView; 
     if(nWeb == nil) { 
     nWeb =[[UIWebView alloc]init]; 
     } 
     [[self webView] loadRequest:[NSURLRequest requestWithURL:url]]; 
     self.view = nWeb; 
    } 

錯誤：

2016-03-13 08:32:39.885 [info][tid:com.facebook.React.JavaScript] Running application "TheNativeMobileWeb" with appParams: {"rootTag":1,"initialProps":{}}. __DEV__ === true, development-level warning are ON, performance optimizations are OFF 
2016-03-13 08:32:41.259 TheNativeMobileWeb[82483:9025502] VIEWCONTROLLER YEAH changed 
2016-03-13 08:32:41.259 TheNativeMobileWeb[82483:9025502] https://facebook.github.io/react-native/ 
2016-03-13 08:32:41.259 TheNativeMobileWeb[82483:9025502] https://facebook.github.io/react-native/ 
1 0x11873ba2e StartWebThread() 
2 0x110bb0eaf __pthread_once_handler 
3 0x110bc5f13 _os_once 
4 0x110bb0e4e pthread_once 
5 0x11773925e +[WebView(WebPrivate) enableWebThread] 
6 0x117733616 WebKitInitialize 
7 0x10ebf3efb ___UIApplicationLoadWebKit_block_invoke 
8 0x11087949b _dispatch_client_callout 
9 0x110864e28 dispatch_once_f 
10 0x10c4dabff _class_initialize 
11 0x10c4e0d23 lookUpImpOrForward 
12 0x10c4ef8bb objc_msgSend 
13 0x10bd73fc0 -[ViewController loadWebView:] 
14 0x10bd73db3 -[ViewController loadURL:] 
15 0x10bd73cc0 -[ViewController changedURL:] 
16 0x10d2a269c __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ 
17 0x10d2a23db _CFXRegistrationPost 
18 0x10d2a2142 ___CFXNotificationPost_block_invoke 
19 0x10d2e7972 -[_CFXNotificationRegistrar find:object:observer:enumerator:] 

Answer 1

可能是在URL的問題，您可以打印網址，並在瀏覽器中直接執行，那麼你就可以明白了。

你試試這個，

NSString *theOrigString = @"your_url_string"; 
    NSString *formattedString = [theOrigString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; 
    NSLog(@"%@", formattedString); 

    - (void)loadWebView:(NSURL *)url { 
      UIWebView *nWeb = _webView; 
      if(nWeb == nil) { 
      nWeb =[[UIWebView alloc]init]; 
      //Set WebView Frame 
      nWeb.frame = CGRectMack(0,0,320,480); 
      } 
      [nWeb loadRequest:[NSURLRequest requestWithURL:url]]; 
      self.view = nWeb; 
     } 

我希望ü幫助。