如何将NSString转换为UIColor [英] How to convert NSString to UIColor

问题描述

我有一个pickerView，它有一个颜色组件。

I have a pickerView which has a component of colors.

我有一个textField（textOther），现在我有所有可用颜色的NSMutableArray，它们是明确定义的。

I have a textField (textOther), now I have NSMutableArray of all the available colors which are explicitly defined.

如何将所有这些颜色（字符串！）传递给这些textField？

How do I pass all those colors(which are strings!) to these textField?

textField setTextColor将只设置一种颜色，但要将字符串传递给颜色我该怎么做？

textField setTextColor will set only a single color, but to pass string to a color how do I do it?

谢谢！

推荐答案

我认为最简单的方法是使用预定义的 UIColor NSDictionary c $ c>实例，并将它们映射为键值对; keys是表示颜色的字符串，value是实际的 UIColor 对象。

I suppose the cleanest way to do this would be by making an NSDictionary with predefined UIColor instances, and map them as key value pairs; keys being the string that represents the color, value being the actual UIColor object.

所以如果你想要的话如果我理解的话，将红色和蓝色都作为可能的颜色（现在在 NSMutableArray 中），你可以制作一个 NSDictionary 像这样：

So if you'd want to have both red and blue as possible colors (which are now in an NSMutableArray if I understood correctly), you'd make an NSDictionary like this:

NSArray * colorKeys = [NSArray arrayWithObjects:@"red", @"blue" nil];
NSArray * colorValues = [NSArray arrayWithObjects:[UIColor redColor], [UIColor blueColor], nil];
NSDictionary * colorMap = [NSDictionary dictionaryWithObjects:colorValues forKeys:colorKeys];

如果你想传递一种颜色（给出一个字符串AKA所说颜色的键），你可以简单地这样做：

If you then want to pass a color (given a string AKA the key of said color), you can simply do this:

NSString * chosenColor = textField.text; // extract desired color from input in textField
textField.textColor = [colorMap valueForKey:chosenColor]; // use this color string to find the UIColor element in the colorMap

希望这能回答你的问题！

Hope this answers your question!

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