蓝牙开发问题，蓝牙命令，十六进制字符串转bytes问题，请各位大神帮忙看看！！

[m0_37633669]

//传入一个16进制字符串：@"328A6102033B516386668561DF5F0B7E"
-(void)getByteWithString:(NSString *)string
{
    NSMutableArray *strMutArr = [[NSMutableArray alloc]init];
    for (int i = 0; i < string.length; i += 2)
    {
        NSString *str = [NSString stringWithFormat:@"0x%@",[string substringWithRange:NSMakeRange(i, 2)]];
        [strMutArr bd_addObject:str];
    }
    //strMutArr打印结果：Printing description of strMutArr:<__NSArrayM 0x145db8730>(0x32,0x8A,0x61,0x02,0x03, 0x3B,0x51,0x63,0x86,0x66,0x85,0x61,0xDF,0x5F,0x0B,0x7E)
    Byte bytes[16];
    for (int j = 0; j < strMutArr.count; j++)
    {
        const char *c = [strMutArr[j] UTF8String];
        Byte byte = (Byte)strtol(c, NULL, 16);
        bytes[j] = byte;
    }
    //bytes结果：(Byte [16]) bytes = {
                                //    [0] = '2'
                                //    [1] = '\x8a'
                                //    [2] = 'a'
                                //    [3] = '\x02'
                                //    [4] = '\x03'
                                //    [5] = ';'
                                //    [6] = 'Q'
                                //    [7] = 'c'
                                //    [8] = '\x86'
                                //    [9] = 'f'
                                //    [10] = '\x85'
                                //    [11] = 'a'
                                //    [12] = '\xdf'
                                //    [13] = '_'
                                //    [14] = '\v'
                                //    [15] = '~'
                                    //}
}

现在想要的结果是和strMuatle结果一一对应如下：
bytes结果：(Byte [16]) bytes = {
[0] = '\x32'
[1] = '\x8a'
[2] = '\x61'
[3] = '\x02'
[4] = '\x03'
[5] = '\x3b'
[6] = '\x51'
[7] = '\x63'
[8] = '\x86'
[9] = '\x66'
[10] = '\x85'
[11] = '\x61'
[12] = '\xdf'
[13] = '\x5f'
[14] = '\x0b'
[15] = '\x7e'
}
但一直不能成功....

Byte byte = (Byte)strtol(c, NULL, 16); 这个方法对于一些十六进制数有时候可以转化成对应的byte,有时候不能，不知道为什么，请大家帮我看看，给点建议，如何才能转换成功。

[qq_38546055]

nsscaner，可以把字符串转16进制int

[qq_38546055]

Nsscaner

[小男孩的王者梦]

有些转换容易歧义的

[dennis_ben]

-(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]; } return data; } 不过是二位二位的转的

[天材地宝]

NSLog(@"data %@", [self dataConvertToHexString:@"328A6102033B516386668561DF5F0B7E"]);

打印结果：data <328a6102 033b5163 86668561 df5f0b7e>


- (NSData *)dataConvertToHexString:(NSString *)hexString
{
const char *chars = [hexString UTF8String];
int i = 0;
NSUInteger len = hexString.length;
NSMutableData *data = [NSMutableData dataWithCapacity:len / 2];
char byteChars[3] = {'\0','\0','\0'};
unsigned long wholeByte;
while (i < len) {

byteChars[0] = chars[i++];
byteChars[1] = chars[i++];

wholeByte = strtoul(byteChars, NULL, 16);
[data appendBytes:&wholeByte length:1];
}

return data;
}

[qwasd116]

NSLog(@"%@",[self hexStringToByte:@"328A6102033B516386668561DF5F0B7E"]);

//从字符串中取字节数组 转成NSdaTa
-(NSData *)hexStringToByte:(NSString*)string {

NSString *hexString=[[string uppercaseString] stringByReplacingOccurrencesOfString:@"-" withString:@""];
if ([hexString length]%2!=0) {
return nil;
}
NSData * data = [hexString dataUsingEncoding:NSUTF8StringEncoding];
Byte *testByte = (Byte *)[data bytes];
Byte testByteArr[16] = {0};
for (int i=0; i<16; i++) {
int post = i*2;
testByteArr[i] = (Byte)(([self toByte:testByte[post]]<<4)|([self toByte:testByte[post+1]]));
NSLog(@"====1122==%02x",testByteArr[i]);
// NSLog(@"====1122==%d",testByteArr[i]);
}
return [NSData dataWithBytes:testByteArr length:16];
}

2019-06-11 10:05:57.401682+0800 UDPSocket[2619:831828] ====1122==32
2019-06-11 10:05:57.401710+0800 UDPSocket[2619:831828] ====1122==8a
2019-06-11 10:05:57.401718+0800 UDPSocket[2619:831828] ====1122==61
2019-06-11 10:05:57.401725+0800 UDPSocket[2619:831828] ====1122==02
2019-06-11 10:05:57.401732+0800 UDPSocket[2619:831828] ====1122==03
2019-06-11 10:05:57.401739+0800 UDPSocket[2619:831828] ====1122==3b
2019-06-11 10:05:57.401746+0800 UDPSocket[2619:831828] ====1122==51
2019-06-11 10:05:57.401753+0800 UDPSocket[2619:831828] ====1122==63
2019-06-11 10:05:57.401760+0800 UDPSocket[2619:831828] ====1122==86
2019-06-11 10:05:57.401766+0800 UDPSocket[2619:831828] ====1122==66
2019-06-11 10:05:57.401773+0800 UDPSocket[2619:831828] ====1122==85
2019-06-11 10:05:57.401779+0800 UDPSocket[2619:831828] ====1122==61
2019-06-11 10:05:57.401785+0800 UDPSocket[2619:831828] ====1122==df
2019-06-11 10:05:57.401792+0800 UDPSocket[2619:831828] ====1122==5f
2019-06-11 10:05:57.401798+0800 UDPSocket[2619:831828] ====1122==0b
2019-06-11 10:05:57.401805+0800 UDPSocket[2619:831828] ====1122==7e
2019-06-11 10:05:57.401849+0800 UDPSocket[2619:831828] <328a6102 033b5163 86668561 df5f0b7e>