Encode Nsstring for Xml/Html

Encode NSString for XML/HTML

There isn't an NSString method that does that. You'll have to write your own function that does string replacements. It is sufficient to do the following replacements:

• '&' => "&"
• '"' => """
• '\'' => "'"
• '>' => ">"
• '<' => "<"

Something like this should do (haven't tried):

[[[[[myStr stringByReplacingOccurrencesOfString: @"&" withString: @"&"]
 stringByReplacingOccurrencesOfString: @"\"" withString: @"""]
 stringByReplacingOccurrencesOfString: @"'" withString: @"'"]
 stringByReplacingOccurrencesOfString: @">" withString: @">"]
 stringByReplacingOccurrencesOfString: @"<" withString: @"<"];

Encode NSString for XML/HTML

There isn't an NSString method that does that. You'll have to write your own function that does string replacements. It is sufficient to do the following replacements:

• '&' => "&"
• '"' => """
• '\'' => "'"
• '>' => ">"
• '<' => "<"

Something like this should do (haven't tried):

[[[[[myStr stringByReplacingOccurrencesOfString: @"&" withString: @"&"]
 stringByReplacingOccurrencesOfString: @"\"" withString: @"""]
 stringByReplacingOccurrencesOfString: @"'" withString: @"'"]
 stringByReplacingOccurrencesOfString: @">" withString: @">"]
 stringByReplacingOccurrencesOfString: @"<" withString: @"<"];

How to convert string to xml in iOS? (objective C, xcode 7.2)

Simple code for SOAP request and parsing.

Goto the link: https://yuvarajmanickam.wordpress.com/2012/10/17/soap-message-request-and-xmlparsing-in-ios-app/

or

github.com/nicklockwood/XMLDictionary

or

stackoverflow.com/questions/803676/encode-nsstring-for-xml-html

URL-encoding and HTML-encoding NSStrings

Returns a representation of the receiver using a given encoding to determine the percent escapes necessary to convert the receiver into a legal URL string.

- (NSString *)stringByAddingPercentEscapesUsingEncoding:(NSStringEncoding)encoding

and

Returns a new string made by replacing in the receiver all percent escapes with the matching characters as determined by a given encoding.

- (NSString *)stringByReplacingPercentEscapesUsingEncoding:(NSStringEncoding)encoding

Objective C HTML escape/unescape

This link contains the solution below. Cocoa CF has the CFXMLCreateStringByUnescapingEntities function but that's not available on the iPhone.

@interface MREntitiesConverter : NSObject <NSXMLParserDelegate>{
    NSMutableString* resultString;
}

@property (nonatomic, retain) NSMutableString* resultString;

- (NSString*)convertEntitiesInString:(NSString*)s;

@end


@implementation MREntitiesConverter

@synthesize resultString;

- (id)init
{
    if([super init]) {
        resultString = [[NSMutableString alloc] init];
    }
    return self;
}

- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)s {
        [self.resultString appendString:s];
}

- (NSString*)convertEntitiesInString:(NSString*)s {
    if (!s) {
        NSLog(@"ERROR : Parameter string is nil");
    }
    NSString* xmlStr = [NSString stringWithFormat:@"<d>%@</d>", s];
    NSData *data = [xmlStr dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];
    NSXMLParser* xmlParse = [[[NSXMLParser alloc] initWithData:data] autorelease];
    [xmlParse setDelegate:self];
    [xmlParse parse];
    return [NSString stringWithFormat:@"%@",resultString];
}

- (void)dealloc {
    [resultString release];
    [super dealloc];
}

@end

iOS HTML Unicode to NSString?

It's pretty easy to write your own HTML entity decoder. Just scan the string looking for &, read up to the following ;, then interpret the results. If it's "amp", "lt", "gt", or "quot", replace it with the relevant character. If it starts with #, it's a numeric entity. If the # is followed by an "x", treat the rest as hexadecimal, otherwise as decimal. Read the number, and then insert the character into your string (if you're writing to an NSMutableString you can use [str appendFormat:@"%C", thechar]. NSScanner can make the string scanning pretty easy, especially since it already knows how to read hex numbers.

I just whipped up a function that should do this for you. Note, I haven't actually tested this, so you should run it through its paces:

- (NSString *)stringByDecodingHTMLEntitiesInString:(NSString *)input {
    NSMutableString *results = [NSMutableString string];
    NSScanner *scanner = [NSScanner scannerWithString:input];
    [scanner setCharactersToBeSkipped:nil];
    while (![scanner isAtEnd]) {
        NSString *temp;
        if ([scanner scanUpToString:@"&" intoString:&temp]) {
            [results appendString:temp];
        }
        if ([scanner scanString:@"&" intoString:NULL]) {
            BOOL valid = YES;
            unsigned c = 0;
            NSUInteger savedLocation = [scanner scanLocation];
            if ([scanner scanString:@"#" intoString:NULL]) {
                // it's a numeric entity
                if ([scanner scanString:@"x" intoString:NULL]) {
                    // hexadecimal
                    unsigned int value;
                    if ([scanner scanHexInt:&value]) {
                        c = value;
                    } else {
                        valid = NO;
                    }
                } else {
                    // decimal
                    int value;
                    if ([scanner scanInt:&value] && value >= 0) {
                        c = value;
                    } else {
                        valid = NO;
                    }
                }
                if (![scanner scanString:@";" intoString:NULL]) {
                    // not ;-terminated, bail out and emit the whole entity
                    valid = NO;
                }
            } else {
                if (![scanner scanUpToString:@";" intoString:&temp]) {
                    // &; is not a valid entity
                    valid = NO;
                } else if (![scanner scanString:@";" intoString:NULL]) {
                    // there was no trailing ;
                    valid = NO;
                } else if ([temp isEqualToString:@"amp"]) {
                    c = '&';
                } else if ([temp isEqualToString:@"quot"]) {
                    c = '"';
                } else if ([temp isEqualToString:@"lt"]) {
                    c = '<';
                } else if ([temp isEqualToString:@"gt"]) {
                    c = '>';
                } else {
                    // unknown entity
                    valid = NO;
                }
            }
            if (!valid) {
                // we errored, just emit the whole thing raw
                [results appendString:[input substringWithRange:NSMakeRange(savedLocation, [scanner scanLocation]-savedLocation)]];
            } else {
                [results appendFormat:@"%C", c];
            }
        }
    }
    return results;
}

iOS decode HTML entity to string

Both link below is working.
It is actually my careless mistake for missing out an character.

https://github.com/Koolistov/NSString-HTML

https://github.com/mwaterfall/MWFeedParser/blob/master/Classes/NSString%2BHTML.m

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