内存管理4Aotorelease自动引用计数

Student.h:

#import <Foundation/Foundation.h>

@interface Student : NSObject
@property(nonatomic,unsigned)int age;
+(id)student;
+(id)initWithAge:(int)age;
@end

#import "Student.h"

@implementation Student

+(id)student{
    return [[[Student alloc] init] autorelease];
}

+(id)initWithAge:(int)age{
    Student *stu=[[[Student alloc] init] autorelease];
    stu.age=age;
    return stu;
}

-(void)dealloc{
    NSLog(@"%@被销毁",self);
    [super dealloc];
}
@end

#import <Foundation/Foundation.h>
#import "Student.h"

int main(int argc, const char * argv[])
{
    //@autoreleasepool代表自动创建一个自动释放池
    @autoreleasepool {
        
        Student * stu=[[Student alloc] init];
        [stu autorelease];

        Student * stu1=[[Student alloc] init];
        [stu1 autorelease];

        //快速创建Student对象
        Student * stu3=[[Student student] autorelease];
    }
//    @autoreleasepool {
//
//        Student * stu2=[[[Student alloc] init] autorelease];
////        [stu2 autorelease];
//
//    }
    return 0;
}