// 16进制颜色转换

#define HexUIColor(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]

//用法

[btn setTitleColor:HexUIColor(0x52575b) forState:UIControlStateNormal];