Android RGB顏色轉(zhuǎn)換 iOS的UIColor

       對(duì)于開(kāi)發(fā)文檔而言,但部分手機(jī)移動(dòng)項(xiàng)目 所標(biāo)注的色值都是 RGB顏色,詞對(duì)于Android開(kāi)發(fā)人員來(lái)說(shuō)十分方便爾對(duì)于iOS開(kāi)發(fā)人員來(lái)說(shuō)十分麻煩

       OC是基于C的擴(kuò)張,因此C語(yǔ)言在OC之中可以無(wú)縫的調(diào)用,對(duì)于轉(zhuǎn)換可以采用 位移 和 與 來(lái)實(shí)現(xiàn)完美轉(zhuǎn)換

1.采用宏定義

       #define UIColorFromRGB(rgbValue) [UIColor colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 green:((float)((rgbValue & 0xFF00) >> 8))/255.0 blue:((float)(rgbValue & 0xFF))/255.0 alpha:1.0]

2.采用類(lèi)別

   @interface UIColor (ColorFromRGB)
/*
示例: 使用十六進(jìn)制的顏色 0x000000~0xffffff
self.view.backgroundColor = [UIColor colorFromRGB:0x0000ff];
*/
+(UIColor *) colorFromRGB:(int) RGBValue;
-(UIColor *) colorFromRGB:(int) RGBValue ;
-(UIColor *) colorFromRGB:(int) RGBValue alpha:(CGFloat) alpha;
@end

@implementation UIColor (ColorFromRGB)
+(UIColor *)colorFromRGB:(int)RGBValue
{
   return [UIColor colorWithRed:(float)((RGBValue&0xFF0000)>>16)/255.0 green:(float)((RGBValue&0xFF00)>>8)/255.0 blue:(float)((RGBValue&0xFF))/255.0 alpha:1.0f];
}
-(UIColor *)colorFromRGB:(int)RGBValue alpha:(CGFloat)alpha
{
return [UIColor colorWithRed:(float)((RGBValue&0xFF0000)>>16)/255.0 green:(float)((RGBValue&0xFF00)>>8)/255.0 blue:(float)((RGBValue&0xFF))/255.0 alpha:alpha];
}
-(UIColor *)colorFromRGB:(int)RGBValue
{
   return [self colorFromRGB:RGBValue alpha:1.0f];
}
@end