保存和检索UIColors到Core Data的最佳方法 [英] Best way to save and retrieve UIColors to Core Data

问题描述

我可以想到几种方法，例如将每个颜色组件保存为float，将数组保存为transformable。从模式图像保存颜色可能会稍微复杂一些，但我想你可以将图像的名称保存为字符串，并将其插入到创建代码。

I can think of a few ways, for instance saving each color component as a float, saving an array as transformable. Saving a color from pattern image could be slightly more complicated, but I guess you could save the name of the image as a string and insert that into creation code.

我在正确的轨道上，那么一般来说，最好的和最有效率的工作是什么？

Am I on the right track, else what is the best and most efficient to do this task in general?

推荐答案

您可以将 UIColor 转换为 NSData

NSData *theData = [NSKeyedArchiver archivedDataWithRootObject:[UIColor blackColor]];

那么您可以将它转换回您的 UIColor object：

then you can convert it back to your UIColor object:

UIColor *theColor = (UIColor *)[NSKeyedUnarchiver unarchiveObjectWithData:theData];

UPD。：

在关于存储数据的注释中回答您的问题，最简单的方法是将它存储在 NSUserDefaults ：

Answering your question in comments about storing the data, the most simple way is to store it in NSUserDefaults:

NSData *theData = [NSKeyedArchiver archivedDataWithRootObject:[UIColor blackColor]];
[[NSUserDefaults standardUserDefaults] setObject:theData forKey:@"myColor"];

，然后检索：

NSData *theData = [[NSUserDefaults standardUserDefaults] objectForKey:@"myColor"];
UIColor *theColor = (UIColor *)[NSKeyedUnarchiver unarchiveObjectWithData:theData];

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