- 定义一个转换颜色的宏。
#define UIColorFromRGBA(rgbValue, alphaValue) [UIColor colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 green:((float)((rgbValue & 0x00FF00) >> 8))/255.0 blue:((float)(rgbValue & 0x0000FF))/255.0 alpha:alphaValue]
- 随时随地使用
UICorlor *color = UIColorFromRGBA(0xFF0000, .75);
3.相互转换
+ (UIColor*) colorWithHex:(NSInteger)hexValue alpha:(CGFloat)alphaValue{
return [UIColor colorWithRed:((float)((hexValue & 0xFF0000) >> 16))/255.0 green:((float)((hexValue & 0xFF00) >> 8))/255.0 blue:((float)(hexValue & 0xFF))/255.0 alpha:alphaValue];
}
+ (UIColor*) colorWithHex:(NSInteger)hexValue{
return [UIColor colorWithHex:hexValue alpha:1.0];
}
+ (NSString *) hexFromUIColor: (UIColor*) color {
if (CGColorGetNumberOfComponents(color.CGColor) < 4) {
const CGFloat *components = CGColorGetComponents(color.CGColor);
color = [UIColor colorWithRed:components[0] green:components[0] blue:components[0] alpha:components[1]];
}
if (CGColorSpaceGetModel(CGColorGetColorSpace(color.CGColor)) != kCGColorSpaceModelRGB) {
return [NSString stringWithFormat:@"#FFFFFF"];
}
return [NSString stringWithFormat:@"#XXX", (int)((CGColorGetComponents(color.CGColor))[0]*255.0), (int)((CGColorGetComponents(color.CGColor))[1]*255.0), (int)((CGColorGetComponents(color.CGColor))[2]*255.0)];
}
