iOS 获取UIColor对象的HSB字符串值。

/**

*  获取UIColor对象的HSB字符串值。

*

*/

- (NSString *)getHSBStringByColor:(UIColor *)originColor {

// Method provided by the Colours class extension

NSDictionary *hsbDict = [self
getHSBAValueByColor:originColor];

return [NSString
stringWithFormat:@"(%0.2f, %0.2f, %0.2f)",

[hsbDict[@"H"]
floatValue],

[hsbDict[@"S"]
floatValue],

[hsbDict[@"B"]
floatValue]];

}

/**

*  获取UIColor对象的HSBA值。

*

*/

- (NSDictionary *)getHSBAValueByColor:(UIColor *)originColor

{

CGFloat h=0,s=0,b=0,a=0;

if ([originColor respondsToSelector:@selector(getHue:saturation:brightness:alpha:)]) {

[originColor
getHue:&h saturation:&s
brightness:&b alpha:&a];

}

return @{@"H":@(h),

@"S":@(s),

@"B":@(b),

@"A":@(a)};

}