iOS URL的Encode 与 URLDecode

原创于 2020-08-19 12:04:41 发布 · 1.7k 阅读

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本文深入探讨了URL编码和解码的过程，提供了详细的Objective-C代码实现，包括如何使用CFURLCreateStringByAddingPercentEscapes和CFURLCreateStringByReplacingPercentEscapes函数进行字符串的编码与解码。

/**
 *  URLEncode
 */
- (NSString *)URLEncodedString:(NSString *)str
{
    // CharactersToBeEscaped = @":/?&=;+!@#$()~',*";
    // CharactersToLeaveUnescaped = @"[].";
    
    NSString *unencodedString = str;
    NSString *encodedString = (NSString *)
    CFBridgingRelease(CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault,
                                                              (CFStringRef)unencodedString,
                                                              NULL,
                                                              (CFStringRef)@"!*'();:@&=+$,/?%#[]",
                                                              kCFStringEncodingUTF8));
    
    return encodedString;
}



/**
 *  URLDecode
 */
-(NSString *)URLDecodedString
{
    //NSString *decodedString = [encodedString stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding ];
    
    NSString *encodedString = self;
    NSString *decodedString  = (__bridge_transfer NSString *)CFURLCreateStringByReplacingPercentEscapesUsingEncoding(NULL,
                                                                                                                     (__bridge CFStringRef)encodedString,
                                                                                                                     CFSTR(""),
                                                                                                                     CFStringConvertNSStringEncodingToEncoding(NSUTF8StringEncoding));
    return decodedString;
}