图片转base64串及反转回图片

图片转base64串：

? ? UIImage *_originImage = [UIImage imageNamed:@"full_playlist_hl.png"];

? ? NSData *_data = UIImageJPEGRepresentation(_image, 1.0f);

? ? NSString *_encodedImageStr = [_data base64Encoding];

?

? ??NSLog(@"===Encoded image:\n%@", _encodedImageStr);

?

Base64串转图片：

? ? NSData *_decodedImageData ? = [[NSData alloc] initWithBase64Encoding:_encodedImageStr];

? ? UIImage *_decodedImage? ? ? = [UIImage imageWithData:_decodedImageData];

?

? ? NSLog(@"===Decoded image size: %@", NSStringFromCGSize(_decodedImage.size));