摘要：
@interface BusinessCard2 : NSObject@property (nonatomic) int _age;@property (nonatomic) Byte _padding; //放在这里会让对象分配内存空间时多分16字节=》alloc(32字节)@property (nonatomic, retain) NSString *_firstName;@property (nonatomic) Byte _b1;@end;@implementation BusinessCard2- (void)dealloc{ [__firstName release];}@end测 阅读全文
