图片 和 base64 互转

图片转base64

NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:urlStr]];

UIImage *img = [UIImage imageWithData:data];

NSString *img64 = [self encodeToBase64String:img];

- (NSString *)encodeToBase64String:(UIImage *)image{

NSString * test = [UIImagePNGRepresentation(image) base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];

return test;

}

base64转图片

NSData *data = [[NSData alloc]initWithBase64EncodedString:base64Str options:NSDataBase64DecodingIgnoreUnknownCharacters];

UIImage *img = [UIImage imageWithData:data];