Byte字节获取

- (void)viewDidLoad
{
    [super viewDidLoad];

    NSLog(@"short----%lu",sizeof(short));
    NSLog(@"int----%lu",sizeof(int));
    NSLog(@"long----%lu",sizeof(long));//32位处理器 4字节；64位处理器 8字节。
    NSLog(@"long long----%lu",sizeof(long long));
    NSLog(@"byte----%lu",sizeof(Byte));
    NSLog(@"char----%lu",sizeof(char));
    NSLog(@"float----%lu",sizeof(float));
    NSLog(@"double----%lu",sizeof(double));
    NSLog(@"bool----%lu",sizeof(BOOL));
    
    NSLog(@"%lu",class_getInstanceSize([UILabel class]));
}

  输出如下：