Is there a method for adding one NSString for NSData?

I'm working on writing to a file one user input on a textField. So far I have one NSFileManager which writes data to a file. Still, 开发者_JAVA技巧I have no way of putting the textField input inside a file.

Is there a way do add a string value to NSData so I can write it?

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you can get NSData from NSString,

NSData *newData = [yourString dataUsingEncoding:NSUTF16StringEncoding];

use encoding that fits your case. append the obtained data to existing NSData,

[existingData appendData:newData]

Note: "existingData" should be an instance of NSMutableData.

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Use below code as your reference.

NSString* myString   = @"Is there a method for adding one NSString for NSData";
NSData* myData=   [myString dataUsingEncoding:NSUTF8StringEncoding];