ios中十六进制的颜色转换为uicolor-尊龙凯时

    #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];  
    }