[IOS] Question about URL encoding in IOS

Source: Internet
Author: User
Tags rfc

[IOS] Question about URL encoding in IOS

The stringbyaddingpercentescapesusingencoding of nsstring can encode the URL parameter, but it is a small problem and will not encode all characters to be encoded. We can use the cfstringref

The cfurlcreatestringbyaddingpercentescapes function encapsulates this function. The Code is as follows:

- (NSString *)encodeToPercentEscapeString: (NSString *) input{    // Encode all the reserved characters, per RFC 3986    // (

Test code:

    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);    

The result is as follows:

    >> 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=($# it's {a*123})00!*'();:@&=+$,/?%#[]    

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