中有时候UI给的一个色号就像 #54e1b7 这个，而我们一般设置颜色都是根据RBG来设置的，所以这里需要把这个16进制的色号转为RGB值，这里我们就使用一下的方法来调用设置颜色。

1 + (UIColor *)getColor:(NSString *)hexColor 2 { 3     if (hexColor == nil || hexColor.length == 0) { 4         NSLog(@"color string is nil."); 5         return [UIColor blackColor]; 6     } 7     unsigned int red,green,blue; 8     NSRange range; 9     range.length = 2;10     11     range.location = 0;12     NSString *deHexColor = [hexColor substringWithRange:range];13     [[NSScanner scannerWithString:deHexColor] scanHexInt:&red];14     15     range.location = 2;16     deHexColor = [hexColor substringWithRange:range];17     [[NSScanner scannerWithString:deHexColor] scanHexInt:&green];18     19     range.location = 4;20     deHexColor = [hexColor substringWithRange:range];21     [[NSScanner scannerWithString:deHexColor] scanHexInt:&blue];22     23     return [UIColor colorWithRed:(float)(red/255.0f) green:(float)(green / 255.0f) blue:(float)(blue / 255.0f) alpha:1.0f];24 }