内存管理4Aotorelease自动引用计数

#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; }