URL上的字符編碼問題，非英文字符-iOS

Question

我正在嘗試在YouTube上進行搜索。此代碼適用於英文字符。但是當我嘗試輸入非英文字母時，如ö，ü，則返回null。

NSString *kStrJsonURL = [NSString stringWithFormat:@"http://suggestqueries.google.com/complete/search?hl=en&ds=yt&client=youtube&hjson=t&cp=1&q=%@&key=API_KEY&format=5&alt=jsonc&callback=?", self.searchField.text]; 
    NSURL *url = [NSURL URLWithString:kStrJsonURL]; 
    NSURLRequest *request = [NSURLRequest requestWithURL:url]; 
    AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, id getJSON) { 
     _JSON = getJSON; 
     NSLog(@"%@", _JSON); 

    } failure:nil]; 
    [operation start]; 

我試圖編碼URL這樣可是不行的..

[self.searchField.text stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding] 

Answer 1

Hahve你試過URL編碼kStrJsonURL？請參閱此帖的接受答案。

How do I URL encode a string

Answer 2

您的代碼應該是這樣的：

//Added this line 
[self.searchField.text stringByReplacingOccurrencesOfString:@" " withString:@"+"]; 
// 
    NSString *kStrJsonURL = [NSString stringWithFormat:@"http://suggestqueries.google.com/complete/search?hl=en&ds=yt&client=youtube&hjson=t&cp=1&q=%@&key=API_KEY&format=5&alt=jsonc&callback=?", self.searchField.text]; 
     NSURL *url = [NSURL URLWithString:[kStrJsonURL stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]; 
     NSURLRequest *request = [NSURLRequest requestWithURL:url]; 
     AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, id getJSON) { 
      _JSON = getJSON; 
      NSLog(@"%@", _JSON); 

    } failure:nil]; 
    [operation start];