iphone : objective-c : how to compress NSString? [duplicate]

This question already has answers here: 开发者_Go百科 Compress/Decompress NSString in objective-c (iphone) using GZIP or deflate (4 answers) Closed 7 years ago.

I want to compress an NSString. How I can do that in objective-c (iphone).

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here you may find you answer.