iOS中十六进制的颜色转换为UIColor

直接贴代码如下：

+(UIColor*)getColor:(NSString *)color{

NSString *cString = [[color stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString];

// colorString should be 6 or 8 characters
if ([cString length] < 6) {
    return [UIColor clearColor];
}

// strip 0X /# if it appears
if ([cString hasPrefix:@"0X"])
    cString = [cString substringFromIndex:2];
if ([cString hasPrefix:@"#"])
    cString = [cString substringFromIndex:1];
// string should be 6 characters
if ([cString length] != 6)
    return [UIColor clearColor];

// Separate into r, g, b substrings
NSRange range;
range.location = 0;
range.length = 2;

//r
NSString *rString = [cString substringWithRange:range];

//g
range.location = 2;
NSString *gString = [cString substringWithRange:range];

//b
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];

CGFloat redFloat=(float) r / 255.0f;
CGFloat greenFloat=(float) g / 255.0f;
CGFloat blueFloat=(float) b / 255.0f;

UIColor *blockColor=[UIColor colorWithRed:redFloat green:greenFloat blue:blueFloat alpha:1.0f];
return blockColor;
}