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));