@end
下面是测试类
KeyTest.h
[cpp]
//
// KeyTest.h
// DictionaryKeyObject
//
// Created by BruceYang on 12-7-31.
// Copyright (c) 2012年 EricGameStudio. All rights reserved.
//
#import
#import "KeyObject.h"
@interface KeyTest : NSObject {
NSMutableDictionary* _dic;
}
-(id) init;
-(void) test;
-(void) add;
-(void) add1;
-(void) echo;
-(void) echo1;
-(void) search;
-(void) dealloc;
@end
//
// KeyTest.h
// DictionaryKeyObject
//
// Created by BruceYang on 12-7-31.
// Copyright (c) 2012年 EricGameStudio. All rights reserved.
//
#import
#import "KeyObject.h"
@interface KeyTest : NSObject {
NSMutableDictionary* _dic;
}
-(id) init;
-(void) test;
-(void) add;
-(void) add1;
-(void) echo;
-(void) echo1;
-(void) search;
-(void) dealloc;
@end
KeyTest.mm
[cpp]
//
// KeyTest.mm
// DictionaryKeyObject
//
// Created by BruceYang on 12-7-31.
// Copyright (c) 2012年 EricGameStudio. All rights reserved.
//
#import "KeyTest.h"
@implementation KeyTest
-(id) init {
if((self = [super init])) {
_dic = [[NSMutableDictionary alloc] init];
}
return self;
}
-(void) test {
NSMutableDictionary* dic = [[NSMutableDictionary alloc] init];
for(int i = 0; i < 5; ++ i) {
KeyObject* keyObject = [[KeyObject alloc] initWithX:i*5 y:i*3];
NSString* valueStr = [NSString stringWithFormat:@"Test%d", i];
/**
* 在调用 setObject:forKey 方法以后，
* key 对象的引用计数依然为 1，value 对象的引用计数增加为 2~
*
*/
NSLog(@"1.kRefCount = %lu, vRefCount = %lu", [keyObject retainCount], [valueStr retainCount]); // 1, 1~
/**
* 作为参数传进来的 keyObject 不是 autorelease 的对象，所以要手动的释放掉~
* 之所以要去手动释放掉是因为字典对象已经将作为参数传进来的 keyObject 键对象深拷贝了一份~
* 这也是之前提到的在调用字典对象的 setObject:forKey 方法后 keyObject 引用计数为什么依然还是 1 的原因~
* 因为字典对象里面的键对象并不是使用的作为参数传进来的那个 keyObject ~
*/
[dic setObject:valueStr forKey:keyObject];
[keyObject release];
NSLog(@"2.KRefCount = %lu, vRefCount = %lu", [keyObject retainCount], [valueStr retainCount]); // 1, 2~
}
NSLog(@"\n---------------------- 分割线 -------------------------\n");
for(KeyObject* keyObject in dic) {
NSString* valueStr = [dic objectForKey:keyObject];
NSLog(@"ValueStrReferenceCount = %lu", [valueStr retainCount]);
NSLog(@"keyObject.x = %d, keyObject.y = %d, valueStr = %@", keyObject.x, keyObject.y, valueStr);
}
/**
* 引用计数为 1 的字典对象 release 一下之后引用计数依然为 1，何解？
* 比较合理的一种解释：
* dealloc 之后的对象去取 retainCount 会返回 1 而非 0~
*/
NSLog(@"1.dicRefCount = %lu", [dic retainCount]); // 1~
[dic release];
NSLog(@"2.dicRefCount = %lu", [dic retainCount]); // 1~
}
-(void) add {
NSLog(@"add");
for(int i = 0; i < 5; ++ i) {
/**
* 因为是 autorelease 的键对象，所以使用完毕后不用再去手动释放掉~
*/
KeyObject* keyObject = [KeyObject kObjectWithX:i*5 y:i*3];
NSString* valueStr = [NSString stringWithFormat:@"Test%d", i];
[_dic setObject:valueStr forKey:keyObject];
}
NSLog(@"_dic.count = %lu", [_dic count]);
}
-(void) add1 {
NSLog(@"add");
for(int i = 0; i < 5; ++ i) {
/**
* 非 autorelease 的键对象，使用完毕后要手动去 release 掉，效率较高(人为控制的销毁时机是最佳的)~
*/
KeyObject* keyObject = [[KeyObject alloc] initWithX:i*5 y:i*3];