颜色(color)转换为三色值(r/g/b)（干货分享）

//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);

}