16进制颜色转UIColor

- (UIColor *)stringToColor:(NSString *)colorStr
{
unsigned int red,green,blue;
NSRange range;
range.length = 2;

range.location = 0;
[[NSScanner scannerWithString:[colorStr substringWithRange:range]]scanHexInt:&red];

range.location = 2;
[[NSScanner scannerWithString:[colorStr substringWithRange:range]]scanHexInt:&green];

range.location = 4;
[[NSScanner scannerWithString:[colorStr substringWithRange:range]]scanHexInt:&blue];

return [UIColor colorWithRed:(float)(red/255.0f)green:(float)(green / 255.0f) blue:(float)(blue / 255.0f)alpha:1.0f];
}