如何对iPhone SDK中的@符号进行URL编码？

Question

使用stringByAddingPercentEscapesUsingEncoding：NSUTF8StringEncoding对URL编码NSString不编码@符号。解决这个问题的正确方法是什么？谢谢。

Answer 1

的代码行，你已经有了后加入这个（并更改接收器等，以你自己的变量）：

[escaped replaceOccurrencesOfString:@"@" withString:@"%40" options:NSCaseInsensitiveSearch range:wholeString]; 

如果你想确保一切进行编码，这里是最好的方法：

NSMutableString *escaped = [actionString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];  
[escaped replaceOccurrencesOfString:@"&" withString:@"%26" options:NSCaseInsensitiveSearch range:wholeString]; 
[escaped replaceOccurrencesOfString:@"+" withString:@"%2B" options:NSCaseInsensitiveSearch range:wholeString]; 
[escaped replaceOccurrencesOfString:@"," withString:@"%2C" options:NSCaseInsensitiveSearch range:wholeString]; 
[escaped replaceOccurrencesOfString:@"/" withString:@"%2F" options:NSCaseInsensitiveSearch range:wholeString]; 
[escaped replaceOccurrencesOfString:@":" withString:@"%3A" options:NSCaseInsensitiveSearch range:wholeString]; 
[escaped replaceOccurrencesOfString:@";" withString:@"%3B" options:NSCaseInsensitiveSearch range:wholeString]; 
[escaped replaceOccurrencesOfString:@"=" withString:@"%3D" options:NSCaseInsensitiveSearch range:wholeString]; 
[escaped replaceOccurrencesOfString:@"?" withString:@"%3F" options:NSCaseInsensitiveSearch range:wholeString]; 
[escaped replaceOccurrencesOfString:@"@" withString:@"%40" options:NSCaseInsensitiveSearch range:wholeString]; 
[escaped replaceOccurrencesOfString:@" " withString:@"%20" options:NSCaseInsensitiveSearch range:wholeString]; 
[escaped replaceOccurrencesOfString:@"\t" withString:@"%09" options:NSCaseInsensitiveSearch range:wholeString]; 
[escaped replaceOccurrencesOfString:@"#" withString:@"%23" options:NSCaseInsensitiveSearch range:wholeString]; 
[escaped replaceOccurrencesOfString:@"<" withString:@"%3C" options:NSCaseInsensitiveSearch range:wholeString]; 
[escaped replaceOccurrencesOfString:@">" withString:@"%3E" options:NSCaseInsensitiveSearch range:wholeString]; 
[escaped replaceOccurrencesOfString:@"\"" withString:@"%22" options:NSCaseInsensitiveSearch range:wholeString]; 
[escaped replaceOccurrencesOfString:@"\n" withString:@"%0A" options:NSCaseInsensitiveSearch range:wholeString]; 

（罗杰@Iphone SDk : Issue with ampersand in the URL string）

Answer 2

到URL编码的最佳方式是与此，从我的博客文章http://simonwoodside.com/weblog/2009/4/22/how_to_really_url_encode/：

NSString * encodedString = (NSString *)CFURLCreateStringByAddingPercentEscapes(
    NULL, 
    (CFStringRef)unencodedString, 
    NULL, 
    (CFStringRef)@"!*'();:@&=+$,/?%#[]", 
    kCFStringEncodingUTF8);