带有中文的url和NSString中文的转换

NSString *url = @"http://tw.news.yahoo.com/麵包魂東京吸睛-粉絲包圍導演-061222049.html";
    NSLog(@"url: %@", url);
//ios9中采用下边方法转换

NSString *urlString = [url stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLFragmentAllowedCharacterSet]];

    //之前方法
    NSString *urlString = [url stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
    NSLog(@"encode url: %@", encodeUrl);

    NSString *decodeUrl = [encodeUrl stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
    NSLog(@"decode url: %@", decodeUrl);
結果如下：
url: http://tw.news.yahoo.com/麵包魂東京吸睛-粉絲包圍導演-061222049.html

encode url: http://tw.news.yahoo.com/%E9%BA%B5%E5%8C%85%E9%AD%82%E6%9D%B1%E4%BA%AC%E5%90%B8%E7%9D%9B-%E7%B2%89%E7%B5%B2%E5%8C%85%E5%9C%8D%E5%B0%8E%E6%BC%94-061222049.html

decode url: http://tw.news.yahoo.com/麵包魂東京吸睛-粉絲包圍導演-061222049.html