在瀏覽器中添加內置Google搜索功能

Question

我想讓我的簡單瀏覽器能夠識別帶空格的文本，並將其視爲Google搜索查詢。要創建一個可以進入url的字符串，我需要用「+」替換空格。

我曾嘗試在第一個「if」語句中執行此操作，但是當我運行該程序並將帶有空格的文本放入搜索欄時什麼也沒有發生;輸入「google.com」或其他網址雖然工作。

我的代碼有什麼問題？

- (BOOL)textFieldShouldReturn:(UITextField *)textField { 
    [textField resignFirstResponder]; 

    NSString *URLString = textField.text; 

    NSURL *URL = [NSURL URLWithString:URLString]; 

    if ([URLString rangeOfString:@" "].location != NSNotFound) { 
    NSString *plusReplace = [URLString stringByReplacingOccurrencesOfString:@" " withString:@"+"]; 
    URL = [NSURL URLWithString:[NSString stringWithFormat:@"google.com/search?q=<%@ query", plusReplace]]; 


    } 

    if (!URL.scheme) { 
     // The user didn't type http: or https: 
     URL = [NSURL URLWithString:[NSString stringWithFormat:@"http://%@", URLString]]; 
    } 

    if (URL) { 
     NSURLRequest *request = [NSURLRequest requestWithURL:URL]; 
     [self.webView loadRequest:request]; 

    } 

    return NO; 

} 

Answer 1

我想你可能會遇到第三個有問題的請求。如果你改變它呢？

if (URL) { 
    NSString *plusReplace = [URLString stringByReplacingOccurrencesOfString:@" " withString:@"+"]; 
    URL = [NSURL URLWithString:[NSString stringWithFormat:@"google.com/search?q=<%@ query", plusReplace]]; 
} 

if (!URL.scheme) { 
    // The user didn't type http: or https: 
    URL = [NSURL URLWithString:[NSString stringWithFormat:@"http://%@", URLString]]; 
} 

NSURLRequest *request = [NSURLRequest requestWithURL:URL]; 
[self.webView loadRequest:request];