IOS图片转base64字符串和字符串转回图片

UIImage图片转成base64字符串：

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

Base64字符串转UIImage图片：

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

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