首页 > 代码库 > IOS开发之——颜色设置

IOS开发之——颜色设置

2024-07-25 21:11:36   213人阅读

颜色设置：


指定RGB，參数是：红、绿、黄、透明度，范围是0-1

+ (UIColor *)colorWithRed:(CGFloat)red green:(CGFloat)green blue:(CGFloat)blue alpha:(CGFloat)alpha;

指定HSB，參数是：色调（hue），饱和的（saturation），亮度（brightness）

+ (UIColor *)colorWithHue:(CGFloat)hue saturation:(CGFloat)saturation brightness:(CGFloat)brightness alpha:(CGFloat)alpha;

当前的颜色改变透明度后的颜色：

UIColor *color = [UIColor redColor];
UIColor *cl = [color colorWithAlphaComponent:0.5f];


自己定义255的颜色值，将255转成0-1

CGFloat R  = (CGFloat) 225/255.0;
CGFloat G = (CGFloat) 66/255.0;
CGFloat B = (CGFloat) 88/255.0;
CGFloat alpha = (CGFloat) 1.0;
    
UIColor *myColorRGB = [ UIColor colorWithRed: R  green: G  blue: B  alpha: alpha  ];
self.tableView.backgroundColor = myColorRGB;


最后附上

UIColor官方API文档：

Creating a UIColor Object from Component Values

  • + colorWithWhite:alpha:
  • + colorWithHue:saturation:brightness:alpha:
  • + colorWithRed:green:blue:alpha:
  • + colorWithCGColor:
  • + colorWithPatternImage:
  • + colorWithCIColor:
  • – colorWithAlphaComponent:

Initializing a UIColor Object

  • – initWithWhite:alpha:
  • – initWithHue:saturation:brightness:alpha:
  • – initWithRed:green:blue:alpha:
  • – initWithCGColor:
  • – initWithPatternImage:
  • – initWithCIColor:

Creating a UIColor with Preset Component Values

  • + blackColor
  • + darkGrayColor
  • + lightGrayColor
  • + whiteColor
  • + grayColor
  • + redColor
  • + greenColor
  • + blueColor
  • + cyanColor
  • + yellowColor
  • + magentaColor
  • + orangeColor
  • + purpleColor
  • + brownColor
  • + clearColor


IOS开发之——颜色设置


联系
我们