基于进度值的UIColor转换

问题描述

我有一个ProgressBar，我想为其指定一个customColor颜色，并根据进度淡入另一种颜色。使用下面的方法，我得到一个深色的彩虹效果颜色，包括红色和深棕色和深绿色。起始颜色为浅蓝色，目标颜色为浅绿色。

I have a ProgressBar to which I want to assign a customColor color and based on the progress fade to another color. Using the method below I get a dark rainbow effect color including reds and dark brown and dark green. The start color will be a light blue one and the destination color a light green.

-(UIColor *) makeCustomColorFromProgressValue:(float) progress{


UIColor *color;

// startColor Color - lightBlue
float red = 0.53;
float green = 0.82;
float blue = 1;

//Destination Color - lightGreen
float finalRed = 0.53;
float finalGreen = 1;
float finalBlue = 0.82;

float newRed = 80;//finalRed *255;
float newGreen = (finalGreen *progress) *255;
float newBlue = (finalBlue *progress) *255;
color = Rgb2UIColor(newRed, newGreen, newBlue);



return color;
}

推荐答案

你可以做一个线性插值颜色之间：

You can do a "linear interpolation" between the colors:

CGFloat newRed   = (1.0 - progress) * red   + progress * finalRed;
CGFloat newGreen = (1.0 - progress) * green + progress * finalGreen;
CGFloat newBlue  = (1.0 - progress) * blue  + progress * finalBlue;
UIColor *color = [UIColor colorWithRed:newRed green:newGreen blue:newBlue alpha:1.0];

这给出了 progress == 0 和
的最终颜色进度== 1 。

这篇关于基于进度值的UIColor转换的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！