ios 开发之 各种数据类型之间转换 (持续补充)

1.图片转base64串及反转回图片

UIImage图片转成base64字符串：

1 UIImage *_originImage = [UIImage imageNamed:@"full_playlist_hl.png"];
2 NSData *_data = UIImageJPEGRepresentation(_image, 1.0f);3 NSString *_encodedImageStr = [_data base64Encoding];
4 NSLog(@"===Encoded image:\n%@", _encodedImageStr);

Base64字符串转UIImage图片：

1 NSData *_decodedImageData   = [[NSData alloc] initWithBase64Encoding:_encodedImageStr];
2 UIImage *_decodedImage      = [UIImage imageWithData:_decodedImageData];
3 NSLog(@"===Decoded image size: %@", NSStringFromCGSize(_decodedImage.size));