zoukankan      html  css  js  c++  java
  • iOS - 16进制色值转化为RGB

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

    #pragma mark - 颜色转换 IOS中十六进制的颜色转换为UIColor

    + (UIColor *) colorWithHexString: (NSString *)color

    {

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

        // String 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];

        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];

        

        return [UIColor colorWithRed:((float) r / 255.0f) green:((float) g / 255.0f) blue:((float) b / 255.0f) alpha:1.0f];

    }

  • 相关阅读:
    Sql Server 邮件日志 操作 IT
    导出Excel IT
    Sqlserver 2005 修改数据库默认排序 IT
    SqlServer 备份数据库语法 IT
    HDFS常用shell命令
    改写UMFPACK算例中的压缩方式(动态)
    umFPACK使用调用(一)
    改写UMFPACK算例中的压缩方式(静态)
    利用C/C++实现从文件读入到子程序中调用返回结果
    改写UMFPACK算例中的压缩方式
  • 原文地址:https://www.cnblogs.com/amy54/p/5091568.html
Copyright © 2011-2022 走看看