Base64 Encode and Decode NSData and NSString Objects...

Base64 Encode and Decode NSData and NSString Objects...

Create a Base64 Encoded NSString Object

// Create NSData object

NSData *nsdata = [@"iOS Developer Tips encoded in Base64"

  dataUsingEncoding:NSUTF8StringEncoding];

 

// Get NSString from NSData object in Base64

NSString *base64Encoded = [nsdata base64EncodedStringWithOptions:0];

 

// Print the Base64 encoded string

NSLog(@"Encoded: %@", base64Encoded);

 

// Let's go the other way...

 

// NSData from the Base64 encoded str

NSData *nsdataFromBase64String = [[NSData alloc]

  initWithBase64EncodedString:base64Encoded options:0];

 

// Decoded NSString from the NSData

NSString *base64Decoded = [[NSString alloc]

  initWithData:nsdataFromBase64String encoding:NSUTF8StringEncoding];

NSLog(@"Decoded: %@", base64Decoded);

The output looks as follows:

Encoded: aU9TIERldmVsb3BlciBUaXBzIGVuY29kZWQgaW4gQmFzZTY0

Decoded: iOS Developer Tips encoded in Base64

Base64 Encode an NSData Object // Create NSData object NSData *dataTake2 =   [@"iOS Developer Tips" dataUsingEncoding:NSUTF8StringEncoding];   // Convert to Base64 data NSData *base64Data = [dataTake2 base64EncodedDataWithOptions:0]; NSLog(@"%@", [NSString stringWithUTF8String:[base64Data bytes]]);   // Do something with the data // ...   // Now convert back from Base64 NSData *nsdataDecoded = [base64Data initWithBase64EncodedData:base64Data options:0]; NSString *str = [[NSString alloc] initWithData:nsdataDecoded encoding:NSUTF8StringEncoding]; NSLog(@"%@", str); Useful link: http://iosdevelopertips.com/core-services/encode-decode-using-base64.html