将 uint8_t 转换为 NSData

NSMutableData *data = [NSMutableData dataWithLength:sizeof(uint8_t)];

[data getBytes:&uint8Value length:sizeof(uint8_t)];

return [NSData dataWithData:data];

- (NSData *)convertUInt8ToNSData:(uint8_t)uint8Value {
    NSMutableData *data = [NSMutableData dataWithLength:sizeof(uint8_t)];
    [data getBytes:&uint8Value length:sizeof(uint8_t)];
    return [NSData dataWithData:data];
}