New features of iOS7: Use native Base64

iOS 7 introduces the following four new NSData methods to manipulate Base64-encoded data:

// From NSData.h   /* Create an NSData from a Base-64 encoded NSString using the given options. By default, returns nil when the input is not recognized as valid Base-64. */ - (id)initWithBase64EncodedString:(NSString *)base64String options:(NSDataBase64DecodingOptions)options;   /* Create a Base-64 encoded NSString from the receiver's contents using the given options. */ - (NSString *)base64EncodedStringWithOptions:(NSDataBase64EncodingOptions)options;   /* Create an NSData from a Base-64, UTF-8 encoded NSData. By default, returns nil when the input is not recognized as valid Base-64. */ - (id)initWithBase64EncodedData:(NSData *)base64Data options:(NSDataBase64DecodingOptions)options;   /* Create a Base-64, UTF-8 encoded NSData from the receiver's contents using the given options. */ - (NSData *)base64EncodedDataWithOptions:(NSDataBase64EncodingOptions)options;

These methods let you easily convert NSData objects to and from Base64, as shown in the following example:

NSData* sampleData = [@"Some sample data" dataUsingEncoding:NSUTF8StringEncoding];   NSString * base64String = [sampleData base64EncodedStringWithOptions:0]; NSLog(@"Base64-encoded string is %@", base64String); // prints "U29tZSBzYW1wbGUgZGF0YQ=="   NSData* dataFromString = [[NSData alloc] initWithBase64EncodedString:base64String options:0]; NSLog(@"String is %@",[NSString stringWithUTF8String:[dataFromString bytes]]); // prints "String is Some sample data"