數據轉換成藍牙數據發送的data

1、如藍牙發送顏色變化數據 -- 根據硬件需要的各種數據的其中一種轉換方式，如下圖，硬件需要8個數據：10、20、30、40、50、60、70、80等

+(NSData *)colorFocusRGB:(NSMutableArray *)array{

    Byte bytes[8];
    bytes[0] = (Byte)([array[0] intValue]);
    bytes[1] = (Byte)([array[1] intValue]);
    bytes[2] = (Byte)([array[2] intValue]);
    bytes[3] = (Byte)([array[3] intValue]);
    bytes[4] = (Byte)([array[4] intValue]);
    bytes[5] = (Byte)([array[5] intValue]);
    bytes[6] = (Byte)([array[6] intValue]);
    bytes[7] = (Byte)([array[7] intValue]);
    
    NSData *data = [NSData dataWithBytes:bytes length:8];
    
    return data;
}

2、藍牙發送顏色直接轉換 -- 硬件需要的數據只需要RGB和Alpha

+(NSData *)bleColorAlpha:(int)alpha andRed:(int)red andGreen:(int)green andBlue:(int)blue{

    NSData * data = [[NSData alloc]init];
    
    NSString * colorStr = [NSString stringWithFormat:@"ctl:%d:%d:%d:%d:",alpha,red,green,blue];
    data = [colorStr dataUsingEncoding:NSUTF8StringEncoding];
    
    NSLog(@"調節顏色的值：%@",data);
    return data;
}

3、發送十六進制的Str變化成data

+(NSData *)hexToBytes:(NSString *)str
{
    NSMutableData* data = [NSMutableData data];
    int idx;
    for (idx = 0; idx+2 <= str.length; idx+=2) {
        NSRange range = NSMakeRange(idx, 2);
        NSString* hexStr = [str substringWithRange:range];
        NSScanner* scanner = [NSScanner scannerWithString:hexStr];
        unsigned int intValue;
        [scanner scanHexInt:&intValue];
        [data appendBytes:&intValue length:1];
    }
    
    NSLog(@"hexToBytes:data:%@",data);
    return data;
}

4、將十進制轉換成十六進制，其中0表示成00

#pragma mark - 將十進制轉換爲16進制
+(NSString *)tenToHex:(long long int)tmpid

{
    
    NSString *nLetterValue;
    NSString *str =@"";
    int ttmpig;
    for (int i = 0; i<9; i++) {
        ttmpig=tmpid%16;
        tmpid=tmpid/16;
        switch (ttmpig)
        {
            case 10:
                nLetterValue =@"A";break;
            case 11:
                nLetterValue =@"B";break;
            case 12:
                nLetterValue =@"C";break;
            case 13:
                nLetterValue =@"D";break;
            case 14:
                nLetterValue =@"E";break;
            case 15:
                nLetterValue =@"F";break;
            default:
                nLetterValue = [NSString stringWithFormat:@"%u",ttmpig];
                
        }
        str = [nLetterValue stringByAppendingString:str];
        if (tmpid == 0) {
            break;
        }
    }
    //不夠一個字節湊0
    if(str.length == 1){
        return [NSString stringWithFormat:@"0%@",str];
    }else{
        return str;
    }
}

5、發送指定的命令到硬件，如0XFF、0XAA等

+ (NSData *)testData
{
    unsigned char Buffer[9];
    Buffer[0] = 0x4A;
    Buffer[1] = 0x53;
    Buffer[2] = 0x02;
    Buffer[3] = 0x23;
    Buffer[4] = 0xAA;
    Buffer[5] = 0xBB;
    Buffer[6] = 0xCC;
    Buffer[7] = 0x36;
    Buffer[8] = 0x57;
    
    return [NSData dataWithBytes:Buffer length:9];
}