Hex color to UIColor

UIColor+ColorCategoryg.m

// Usage: [self.navigationBar setTintColor: [AppDelegate colorWithHexString:@"4891CC"]];

@interface UIColor (ColorCategory) 

+(UIColor *) colorWithHexString:(NSString *)hex;

@end

@implementation UIColor (ColorCategory)

+(UIColor *) colorWithHexString:(NSString *)hex
{
    NSString *cString = [[hex stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString];
 
    // String should be 6 or 8 characters
    if ([cString length] < 6) return [UIColor grayColor];
 
    // strip 0X if it appears
    if ([cString hasPrefix:@"0X"]) cString = [cString substringFromIndex:2];
 
    if ([cString length] != 6) return  [UIColor grayColor];
 
    // Separate into r, g, b substrings
    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];
 
    // Scan values
    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];
}

@end