objective c 不同数据类型转换

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1. NSString 转 byte字节

   NSData *strDataBytes = [@"$$" dataUsingEncoding:NSUTF8StringEncoding];

   转换结果为｛0x24, 0x24};

2. int 转 byte

   NSMutableData *myData = [[NSMutableData alloc] init];

   int num = 1024;

   [myData appendBytes:&num length:sizeof(num)];

3. Byte数组 转 NSData

   Byte *bytes = {***};

   NSData *strData = [NSData dataWithBytes:bytes length:strlen];
   

4. NSData 转 NSString

   NSData *strData = ***;
   

   NSString* string = [[NSString alloc] initWithData:strData encoding:NSUTF8StringEncoding];

来源：oschina

链接：https://my.oschina.net/u/1402271/blog/277844