URL Encoding a string

Question

i am receiving a json data object and then i extract a string from it ``` NSDictionary *jsonDictionary = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil]; NSString *country=jsonDictionary[@"address"][@"country"]; ``` then i try to make the string suitable to be used in a URL ``` NSString *newCountryString = [country stringByReplacingOccurrencesOfString:@" " withString:@"%%20"]; ``` but it is not working if i hard coded the newCountryString it would work, why is that ?

Accepted Answer

Use This -

```
NSString *newCountryString = [country stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
```

This code will return a representation of the receiver using a given encoding to determine the percent escapes necessary to convert the receiver into a legal URL string.

for more details: https://developer.apple.com/documentation/foundation/nsstring/1415058-stringbyaddingpercentescapesusin

Edit - stringByAddingPercentEscapesUsingEncoding is deprecated in iOS 9. Use following instead

```
[country stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLHostAllowedCharacterSet]]
```

Swift 3 -

```
country.addingPercentEncoding( withAllowedCharacters: .urlHostAllowed)
```

for more details: https://developer.apple.com/documentation/foundation/nsstring/1411946-stringbyaddingpercentencodingwit?language=objc

URL Encoding a string

Solution

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