本节目录
添加了autorelease后就不用再用release代码，它会自己释放
#import <Foundation/Foundation.h> #import "Book.h" #import "Student.h" int main(int argc, const char * argv[]) { @autoreleasepool { Book *book = [[[Book alloc] init] autorelease]; } return 0; }
可以看到程序运行结束会Book被销毁
2014-03-18 18:11:20.808 HellowWord_OC[1499:303] Book 被销毁
如果没有再auorelease,Book被销毁不会被打印出来，说明这个对象没有被销毁
Book.h
#import <Foundation/Foundation.h> @interface Book : NSObject @property(nonatomic,assign)double price; +(id )book; +(id)bookWithPrice:(double)price; @end
Book.m
#import "Book.h" @implementation Book +(id)book{ return [[[Book alloc] init] autorelease]; } +(id)bookWithPrice:(double)price{ //Book *book = [[[Book alloc] init] autorelease]; //Book *book = [self book];self指类名 Book *book = [Book book]; book.price = price; return book; } -(void)dealloc{ NSLog(@"Book 被销毁"); [super dealloc]; }
猜下有几个销毁代码？
#import <Foundation/Foundation.h> #import "Book.h" #import "Student.h" int main(int argc, const char * argv[]) { @autoreleasepool { Book *book = [[[Book alloc] init] autorelease]; //自定释放，不用添加relase代码 Book *book1 = [Book book]; //自定释放，不用添加relase代码 Book *book2 = [Book bookWithPrice:12.50]; Book *book3 = [[Book alloc] init]; } return 0; }
总结：实例化对象时，是用alloc的方法的就要进行添加autorealese或者release代码
通过静态方法实例化的不用添加autorealese或者release代码
【Lession 10 OC语言】- 内存管理3 -autorelease,布布扣,bubuko.com
【Lession 10 OC语言】- 内存管理3 -autorelease
原文：http://www.cnblogs.com/vincent-guo/p/3608442.html