程序员人生网站导航

颜色(color)转换为三色值(r/g/b)（干货分享）

栏目：互联网时间：2014-10-04 08:00:01

//颜色转换 ##665522 ― 三色值
+ (UIColor *)setFontColorWithString:(NSString *)color
{
    NSString *cString = [[color stringByTrimmingCharactersInSet:[NSCharacterSetwhitespaceAndNewlineCharacterSet]] uppercaseString];

    // 字符串个数必须大于等于6
    if ([cString length] < 6) {
        return [UIColorclearColor];
    }

    // 根据16进制来区分
    if ([cString hasPrefix:@"0X"])
        cString = [cString substringFromIndex:2];
    if ([cString hasPrefix:@"#"])
        cString = [cString substringFromIndex:1];
    if ([cString length] != 6)
        return [UIColorclearColor];

    // 分为r,g,b 子字符串
    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];

    // 扫描r,g,b值
    unsignedint r, g, b;
    [[NSScannerscannerWithString:rString] scanHexInt:&r];
    [[NSScannerscannerWithString:gString] scanHexInt:&g];
    [[NSScannerscannerWithString:bString] scanHexInt:&b];

    return RgbHex2UIColor(r, g, b);

}

------分隔线----------------------------

上一篇 非常棒的Android开源项目分类汇总

下一篇 2-09. 装箱问题模拟（20） (ZJUPAT 模拟)

------分隔线----------------------------