IOS开发转换UI设计师给的颜色值

 -(UIColor *) colorWithHexString: (NSString *)color{
NSString *cString = [[color stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString];
if ([cString length] <6) {
return [UIColor clearColor];
}
if ([cString hasPrefix:@"0X"])
 cString = [cString substringFromIndex:2];
if ([cString hasPrefix:@"#"])
cString = [cString substringFromIndex:1];
if ([cString length] !=6)
 return [UIColor clearColor];
NSRange range;
range.location =0;
range.length =2;
NSString *rString = [cString substringWithRange:range];
range.location =2;
NSString *gString = [cString substringWithRange:range];
range.location =4;
NSString *bString = [cString substringWithRange:range];
unsigned int r, g, b;
[[NSScanner scannerWithString:rString] scanHexInt:&r];
[[NSScanner scannerWithString:gString] scanHexInt:&g];
[[NSScanner scannerWithString:bString] scanHexInt:&b];
return [UIColor colorWithRed:((float) r /255.0f) green:((float) g /255.0f) blue:((float) b /255.0f) alpha:1.0f];
}