iOS下URL編碼

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使用NSString預設的URL編碼,會對漢字等進行轉義,但是對=+等這些字元不會進行轉義

所以要手動實現這些字元的轉義

 

- (NSString *)encodeToPercentEscapeString: (NSString *) input  {      // Encode all the reserved characters, per RFC 3986      // (<http://www.ietf.org/rfc/rfc3986.txt>)      NSString *outputStr = (NSString *)       CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault,                                              (CFStringRef)input,                                              NULL,                                              (CFStringRef)@"!*‘();:@&=+$,/?%#[]",                                              kCFStringEncodingUTF8);      return outputStr;  }    - (NSString *)decodeFromPercentEscapeString: (NSString *) input  {      NSMutableString *outputStr = [NSMutableString stringWithString:input];      [outputStr replaceOccurrencesOfString:@"+"                                 withString:@" "                                    options:NSLiteralSearch                                      range:NSMakeRange(0, [outputStr length])];        return [outputStr stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];  }  

 

測試代碼

NSString * testUrl      = @"http://search.google.com?keywords=($# it‘s {a*123})00!*‘();:@&=+$,/?%#[]";  NSLog(@"original: %@", testUrl);    NSString * encodeStr    = [self encodeToPercentEscapeString:testUrl];  NSLog(@"encoded: %@", encodeStr);    NSString * encodeStr2   = [testUrl stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];  NSLog(@"encoded2:%@", encodeStr2);    NSString * decodeStr    = [self decodeFromPercentEscapeString:encodeStr];  NSLog(@"decoded: %@", decodeStr);  

 

 

結果

>> original: http://search.google.com?keywords=($# it‘s {a*123})00!*‘();:@&=+$,/?%#[]  >> encoded:  http%3A%2F%2Fsearch.google.com%3Fkeywords%3D%28%24%23%20it%27s%20%7Ba%2A123%7D%2900%21%2A%27%28%29%3B%3A%40%26%3D%2B%24%2C%2F%3F%25%23%5B%5D  >> encoded2: http://search.google.com?keywords=($%23%20it‘s%20%7Ba*123%7D)00!*‘();:@&=+$,/?%25%23%5B%5D  >> decoded:  http://search.google.com?keywords=($# it‘s {a*123})00!*‘();:@&=+$,/?%#[] 

 

 

轉自:http://blog.csdn.net/kesalin/article/details/6678939

 

iOS下URL編碼