在ios 5中創建一個統一的地址搜索欄？

Question

幫助在ios 5中爲瀏覽器應用製作統一的地址欄？所以這裏是我的地址欄。

-(IBAction)url:(id)sender { 
    NSString *query = [urlBar.text stringByReplacingOccurrencesOfString:@" " withString:@"+"]; 
    NSURL *urlQuery = [NSURL URLWithString:[NSString stringWithFormat:@"http://%@", query]]; 
    NSURLRequest *request = [NSURLRequest requestWithURL:urlQuery]; 
    [webPage loadRequest:request]; 
} 

我不能添加一個「其他」引用來說，如果它不是一個地址，那麼附加谷歌搜索標籤？如果是這樣如何？你會知道如何使用Bing而不是谷歌？

-(IBAction)googleSearch:(id)sender { 
    NSString *query = [googleSearch.text stringByReplacingOccurrencesOfString:@" " withString:@"+"]; 
    NSURL *urlQuery = [NSURL URLWithString:[NSString stringWithFormat:@"http://www.google.com/search?hl=en&site=&q=%@", query]]; 
    NSURLRequest *request = [NSURLRequest requestWithURL:urlQuery]; 
    [webPage loadRequest:request]; 
} 

Answer 1

這裏有一些技巧可以幫助你：

• 使用stringByAddingPercentEscapesUsingEncoding:而不是你的 「+」 替代。
• 你應該確認http：//不是一個前綴URL字符串添加之前
• 應實現UIWebViewDelegate協議時加載一個無效的URL時出現錯誤識別
• 則作爲備用發射您的Google搜索（現在您可以用「+」替換「」）...或者Bing，無論您是做什麼的！

您的代碼應該看起來如下：

... 
webView.delegate = self; // Should appear in your code somewhere 
... 

-(IBAction)performSearch { 
    if ([searchBar.text hasPrefix:@"http://"]) { 
     ... // Make NSURL from NSString using stringByAddingPercentEscapesUsingEncoding: among other things 
     [webView loadRequest:...] 
    } else if ([self isProbablyURL:searchBar.text]) { 
     ... // Make NSURL from NSString appending http:// and using stringByAddingPercentEscapesUsingEncoding: among other things 
     [webView loadRequest:...] 
    } else { 
     [self performGoogleSearchWithText:searchBar.text] 
    } 
} 

- (BOOL)isProbablyURL:(NSString *)text { 
    ... // do something smart and return YES or NO 
} 

- (void)performGoogleSearchWithText:(NSString *)text { 
    ... // Make a google request from text and mark it as not being "fallbackable" on a google search as it is already a Google Search 
    [webView loadRequest:...] 
} 

- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error { 
    ... // Notify user 
    if (was not already a Google Search) { 
     [self performGoogleSearchWithText:searchBar.text] 
    } 
}