#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]
2.随时随地使用
UICorlor *color =UIColorFromRGBA(0xFF0000,.75);
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