[_dic setObject:valueStr forKey:keyObject];
[keyObject release];
}
NSLog(@"_dic.count = %lu", [_dic count]);
}
/**
* objective-c 字典常规的遍历方式，先快速遍历字典的键，然后用键找出对应的值~
*/
-(void) echo {
NSLog(@"echo");
NSLog(@"_dic.count = %lu", [_dic count]);
for(KeyObject* keyObject in _dic) {
NSString* valueStr = [_dic objectForKey:keyObject];
NSLog(@"keyObject.x = %d, keyObject.y = %d, valueStr = %@", keyObject.x, keyObject.y, valueStr);
}
}
/**
* 朋友问我怎么打印出 NSMutableDictionary 中的内容，我不假思索地便回答：遍历+打印啊~
* 然后，对方投来鄙视的一眼，“你就不知道重写值对象的 -(NSString*) description;方法？”
* 顿时我就傻了~在 java 里面没少这么干，在 objective-c 里面竟然不知道举一反三，实乃罪过~
*/
-(void) echo1 {
NSLog(@"echo1");
NSLog(@"_dic.count = %lu", [_dic count]);
NSLog(@"%@", _dic);
}
-(void) search {
NSLog(@" -------- search begin! --------");
KeyObject* k0 = [KeyObject kObjectWithX:5 y:3];
NSString* result0 = [_dic objectForKey:k0];
NSLog(@"结果为：%@", result0);
KeyObject* k1 = [KeyObject kObjectWithX:20 y:12];
NSString* result1 = [_dic objectForKey:k1];
NSLog(@"结果为：%@", result1);
NSLog(@" -------- search finish! --------");
}
-(void) dealloc {
[_dic release];
[super dealloc];
}
@end
//
// 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